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RV LIFE

RV Plumbing: How To Fix Water Supply Lines

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  • Maintenance, Modifications and Repairs

When something goes wrong with plumbing in your house, the “fixer” can be at your door within a couple of hours. But when you discover a leak in your plumbing, it’s that not simple.

Not too many plumbers make RV house calls. Whether you’re on the road as a snowbird or find a problem while prepping your RV for spring , getting a repair done at a service facility could mean days, even weeks, just waiting for an appointment. That’s an untenable situation, especially for snowbirds.

plumbing

There are a series of waterlines in an RV and ensuring quality tubing is recommended. Photo courtesy TG Twinkie, airforums.com member

In many cases, a break or leak in an RV water supply line is often a literal snap to repair. That’s because the water lines in most RVs are plastic “PEX” pipe. They are not buried inside walls and are usually accessible for easy repair. PEX stands for cross-linked polyethylene.

Typically, this pipe is connected using a special tool and metal fittings that can complicate the fixing procedure for RVers. The good news is you can skip the tool altogether. Instead, use a variety of plastic fittings, some of which snap the stuff together, making repairs quick, easy, and relatively inexpensive.

plumbing

In RVs, manufacturers typically use translucent non-colored PEX for all runs.

What is PEX tubing for the plumbing in my RV?

PEX tubing in homes is color-coded for hot and cold. In RVs, manufacturers typically use translucent non-colored PEX for all plumbing runs.

Further, two sizes are used, 3/8-inch and ½-inch. These are the standard size because the outside diameter of the tubing is about 1/8-inch greater than the called-for size. Also, PEX is inexpensive. At one hardware store, bulk 3/8-inch may set you back 50 cents/foot.

Additionally, PEX is ideal for both cold and hot water (some up to 200 degrees) plumbing. Typically, the rating is on the tubing itself. Chlorinated water is not an issue in terms of tubing or health safety.

What tools do I need?

While working on water lines , you just need a tool to cut the PEX tubing itself. You can use a utility knife, but a tubing cutter designed for PEX ensures a clean, even edge.

This is also a requirement for a leak-proof connection. These cutters are less than $10. I usually go with a PVC pipe cutter, which makes a clean edge and can be used on PVC pipe as well.

Fittings that are required

When you need to change out your water lines , there are a variety of different fittings available. They range from simple couplers that allow you to fix a break to tees that are for jobs when adding a new run.

plumbing

The partial assembly of the tubing in place over the flare. The next step is to tighten the nut.

Others include adapters that allow you to shift from one size of tubing to another. Want to add a shut-off valve to turn the water off to your toilet (or whatever) without shutting down the whole RV supply?

There are fittings for that, too. Here are a couple of styles particularly useful to RVers when it comes to plumbing:

  • Plastic compression fittings: A brand found in many hardware stores is Flair-It. These are relatively inexpensive. We bought a 3/8-inch tee fitting in a small-town hardware store, but you can also find them on Amazon . Simply, cut the tubing squarely and ensure there aren’t any burrs on the tube. Unscrew the nut from the fitting, and slide it back over the tubing. Now, push the tubing over the fitting flare, rocking it back and forth until it comes to a full stop against the fitting. Then, tighten the nut by hand until secure. Need to take it apart? Just reverse the order of assembly instructions.

plumbing

The assembled tubing inserted into the fitting. (*Note: The tube stiffener not visible as it’s inside the fitting)

So, what are advantages of this? They are less expensive than quick-connect fittings. However, the disadvantages are when you are working in a cramped area.

It can be a bit difficult to maneuver your hands in place to shove the tubing onto the fitting and to tighten the nut.

  • Quick-Connect fittings: Made by Watts, these are a little more costly. A 3/8-inch coupler for joining two pieces of tubing is around $4.00. Using these fittings in a cramped area is much easier. Again, cut the tubing square and check for burrs. Slide the included “tube stiffener” into the end of the tubing until there’s resistance. Now, keep pushing until the tubing comes to a complete stop. Finish the job by inserting the included collet clip on the joint.

To take this connector apart, remove the collet clip. Then, push the collet firmly against the tubing face and pull the tubing out of the fitting.

Aside from an easier fix in a cramped space, there’s less water flow impediment in this design, as opposed to the plastic compression style. Both insert material into the flow, but the tube stiffener appears to block less water flow.

Additionally, the Watts fittings allow you to attach to a host of other plumbing materials, including copper and CPVC. What’s more is the quick-connect fittings and the plastic compression fittings will connect directly to polybutylene tubing.

You may find other brands of quick-connect fittings to meet your needs as well. Some of the larger stores sell other brands of fittings, and of course, price comparing is the order of the day.

travel trailer water lines

RV Plumbing System Basics: Diagrams & How It All Works

travel trailer water lines

RVs can be intimidating, especially if you’re brand new to them. They have so many different systems and it’s all so different from what we’re used to in our homes. Learning it all can feel overwhelming, but RVing Headquarters is here to help! If you want to learn RV plumbing system basics, you’re in the right place. 

Not only do we cover the basics and include RV plumbing diagrams, we’ve also got several step-by-step “how-to” tutorials in this post! 

This guide covers:

  • RV plumbing system basics
  • RV holding tanks
  • How RV toilets work and how to use them
  • How to sanitize your fresh water tank
  • How to dump your waste water
  • How to find RV dump stations
  • Essential RV plumbing accessories
  • And so, so much more!

This post contains affiliate links. This means if you make a purchase after clicking a link on our website, we may earn a small commission at no extra cost to you.

Table of Contents

RV Plumbing System Basics

Your RV plumbing system is made up of many of the same components as a house plumbing system, with a major difference: you store your fresh AND waste water on board. 

Every self-contained RV will have at least 3 water holding tanks, and the size of the tanks is dependent on the size of the RV. The holding tanks on an RV are: 

  • Fresh water tank – stores fresh, potable* water for drinking, cleaning, and showering.
  • Grey water tank – stores waste water from your sinks and shower. 
  • Black water tank – stores waste water from your toilets–aka sewage.

*Potable water is water that is safe for human consumption. 

Some larger RVs and fifth wheels may have 4 tanks if they have two bathrooms. 

These 3 tanks allow you to have all the comforts of home, no matter where you are. 

You can use the toilet in your RV, shower in your RV , wash dishes, cook, and yes: you can even drink the water from your RV fresh water tank.

You can fill your RV with fresh water from home, campgrounds, or anywhere with a potable water spigot. 

When it’s time to dump your waste water, you need to find an approved RV dump station and connect a sewer hose to dump your RV–we explain all of this later in this post.

RV waste water must always be dumped at an approved dump station. Never dump your RV waste water on the ground. It’s illegal and it’s a biohazard!

Your RV has holding tank sensors on each tank and a panel inside the RV that tells you how full your tanks are so you always know if you need water or if you need to find a dump station.

RV Plumbing System Diagram: An Overview

travel trailer water lines

Water-Using Appliances and Fixtures in an RV

Every self contained RV will have these fixtures and appliances at minimum: 

  • Hot water heater

The bigger and more luxurious an RV you have, the more water-using appliances and fixtures you will have. These include: 

  • Shower(s) – indoor and outdoor
  • Washing machine

RV Holding Tanks Explained

To understand RV plumbing system basics, you need to understand RV holding tanks. There are 3 types of holding tanks in every self-contained RV , and each type of tank holds a different kind of water. 

Although larger RV types may have more than 3 tanks total, there are only 3 kinds. 

Fresh Water Tank

The fresh water tank holds fresh, potable water. You can use this water for drinking, showering, cooking, and washing dishes. 

The fresh water tank supplies water to every water-using appliance in your RV. This tank has a filling port on the RV exterior called the city water connection. 

“City Water” can mean potable water from any potable source, like from your house spigot, a campground, etc. 

Depending on the size of your RV, your fresh water holding tank may be able to hold anywhere from 12 – 100 gallons of fresh water.

Grey Water Tank

“Grey water” is the term used to describe waste water from your sinks, showering, dishwasher, and washing machines. This waste water contains soaps, washing chemicals, and even food particles from washing dishes. Grey water is not true sewage, but it can definitely develop a terrible odor! 

Typically, the grey water tank on your RV is as big as (or bigger) than your RV fresh water tank. The grey water tank also fills up the fastest and needs dumped more often.

This tank is plumbed to the grey tank waste valve on the exterior of your RV for dumping.

Black Water Tank

“Black water” is the term used to describe sewage, so your black water tank is your sewage tank. The black tank holds waste and waste water from your toilets, and occasionally your bathroom sink. 

If your RV has two bathrooms on either end of the RV, you will likely have 2 black tanks. This is because the black tank is always directly beneath the toilet. This allows solid waste and paper to drop straight from the toilet into the black tank, so you never have to worry about toilet clogs (unless you develop a poop pyramid). 

The black tank is plumbed to the black tank waste valve on the exterior of your RV for dumping, located right next to the gray tank waste valve.

RV Holding Tank Diagram

RV holding tank diagram black and gray tank

The RV Toilet Explained & RV Toilet Diagram

travel trailer water lines

If you’ve ever stepped foot in an RV bathroom, you probably noticed that RV toilets are nothing like residential toilets . 

They have a flap that closes the hole, and a pedal on the exterior of the toilet. They don’t have a fresh water holding tank and they also look quite a bit different from a residential toilet. Some RV toilets even have a sprayer or spraying wand for rinsing the bowl. 

So how does an RV toilet work ? 

How Your RV Toilet Works

There are 3 things that make the RV toilet work: 

An RV toilet doesn’t have a freshwater tank, but it is hooked up to a water line which you can usually see on the back of the toilet.

The RV toilet pedal works to open the flap and flush the toilet, but it also serves two purposes. 

If you hold the pedal down halfway, it fills the toilet bowl with water but doesn’t open the flap. 

If you press the pedal all the way, it opens the flap AND activates the water. 

The flap in the bottom of the toilet bowl is lined with a rubber gasket, called the flush seal. This rubber gasket serves two purposes: it holds water in the toilet bowl, and it also creates an air-tight seal to prevent odors from the black tank from entering the RV. 

RV Toilet Diagram

RV toilet diagram - the rv toilet is plumbed into the black tank as you can see in the RV toilet plumbing diagram

How to Use an RV Toilet

You can use your RV toilet for both #1s and #2s, but the process is a little different for each. 

To use an RV toilet, first hold down the pedal halfway to add some water to the toilet bowl. If you’re going #2, be sure there is plenty of water in the bowl.

To flush, depress the pedal all the way. Hold the pedal down long enough to flush all debris out of the toilet bowl and rinse it. 

If you go #2 or you use toilet paper, hold the pedal down for several seconds to flush with plenty of water. 

The key to preventing RV black tank clogs is making sure you always have plenty of water in the tank to help liquify solid waste. 

This information is for a standard RV toilet which is the most common, but there are many other RV toilet types. Examples include the composting toilet , cassette toilet, macerating toilet, and more.

IMPORTANT RV TOILET TIP: How to Avoid RV Black Tank Clogs

RV black tank clogs are something no one wants to deal with, but they happen often. One of them is the dreaded RV poop pyramid that happens when solid waste and paper build up and create a literal pyramid in the tank.

Here are 4 important tips to prevent RV black tank clogs (essential RV plumbing system basics tips).  

  • Always flush with plenty of water. 
  • Use RV-specific toilet paper in your RV toilet, or don’t flush your paper and put it in a trash can instead. 
  • NEVER leave your black tank waste valve open, even at a full hook-up campground. This causes poop pyramids by allowing liquids to drain and solids will build up. Leave it closed until the tank is full and ready to dump.
  • Use a black tank treatment like RV Digest-It to help dissolve solid waste. 2oz treats a 40 gallon tank, add it in after you dump and rinse your tank. This will prevent dried waste from accumulating in your black tank.

RV Plumbing System Inputs and Outputs

travel trailer water lines

So how does fresh water go IN your RV, and waste water go OUT? 

City Water Connection/Fresh Water Fill

Fresh water goes into your RV via the city water connection, which is a port on the exterior of your RV that you hook a hose up to. 

Never use a regular garden hose to add fresh water to your RV–you need a potable water hose. Potable water hoses are made specifically for clean drinking water and are free of the chemicals that can leach into the water that you find in garden hoses. 

Never use your potable water hose for anything other than drinking water. You can use a utility hose for everything else! Store your potable water hose in its own separate and SANITARY container. You never want to risk cross-contaminating! 

RV Waste Valves

travel trailer water lines

RV waste valves are exactly what they sound like: valves that open to dump your RV waste water. 

Your RV fresh water fill and RV waste valves are both located on the driver’s side exterior of your RV. 

In many cases, they are all located in the same general area. Some RVs have a sanitation-station area located in a storage bay, but others have them exposed.

The gray water and black water waste valves will usually look just like handles attached to a metal rod. Pulling these handles will open a valve, called a gate valve, that dumps your RV waste water tanks. 

These valves have a rubber gasket, similar to the one on your toilet flap. This keeps them closed and watertight, but they can fail from time to time. If you notice waste water dripping from this area, you may need to replace your gate valve. 

Never pull your gate valve handle until you are absolutely sure that your RV sewer hose is tightly connected and securely attached to a dump station.

Once you pull the valve to dump your tanks, water comes out with such force that the hose can easily pop off or come out of the sewer port on the ground. 

Editor’s Note: The sewer hose popping off mid-dump has happened to me more than once and it’s a disgusting mess! Now I am always sure to tug on my sewer hose at the connection after I hook it up to make sure it’s secure.

How to Fill Your RV Fresh Water Tank

travel trailer water lines

One of the easiest RV plumbing system basics is filling your fresh water tank. Filling your fresh water tank is as simple as hooking up your potable water hose to a spigot, connecting it to your RV, and turning on your “Fresh Tank Fill”. 

The fresh tank fill may be labeled differently on different RVs, but it should say something similar. 

On most RVs, it’s a knob that can point in one of two directions: city water or fresh tank fill. 

Leaving the knob on “City Water” does not fill your fresh water tank. This simply allows the water from the spigot to go directly to your taps and appliances any time you use them. This is a good option if you are staying in one spot for a long period of time, as long as the temps are above freezing. 

Turning the knob to “Fresh Water Fill” will allow the water to go through your RV plumbing and fill up your fresh tank. Be sure to constantly monitor your tank monitoring panel so you can turn the water off before your fresh water tank overflows. 

Can You Drink Water From Your RV?

Yes! You can drink water from your RV, as long as you keep up on your fresh water tank sanitization maintenance. Your RV is meant to be a home-away-from-home, and it’s meant to have every creature comfort as a house. 

If you regularly sanitize your fresh water tank, the water in your RV can be used for drinking, bathing, washing dishes, and cooking! 

Sanitizing Your RV Fresh Water Tank – RV Plumbing System Basics

You should sanitize your RV fresh water tank every 6 months if you’re a full-time RVer, or before every camping season if you’re a part-time RVer.

Sanitizing your RV water tank is a pretty simple procedure. It involves adding chlorinated water to your fresh water tank and running it through all your faucets. Then, let it sit for several hours, drain it out, and run fresh water through your system. 

Important: Never add undiluted bleach to your RV plumbing system. This will damage your tank and pipes! Always be sure to mix bleach with plenty of water and have a few gallons of water already in your tank before adding the bleach mixture. 

You’ll need about ½ cup of bleach for every 25 gallons of fresh water. Mix your required amount of bleach with several gallons of fresh water before adding to your RV tank.

  • Drain your RV fresh water system including all faucets, toilet, shower, etc. 
  • Turn off and bypass your hot water heater and any other appliance you don’t want bleach to get in. There are knobs to do this, refer to your owners manual if necessary.
  • Mix your bleach with several gallons of fresh water. 
  • Add bleach water to your RV fresh water system.
  • Fill fresh water tank. 
  • Turn on your water pump and open all faucets one by one until you smell the bleach water mixture.
  • Let sit for 6-12 hours. 
  • Drain your fresh water tank and refill. 
  • Run fresh water through all your faucets (one-by-one) until you no longer smell bleach, and you’re done!

How and Where to Dump Your RV Waste Water

how to dump your RV waste tanks: photo shows a person connecting RV sewer hose to dump their RV waste tanks

To dump your RV waste water, you need: 

  • An RV sewer hose kit with a clear attachment
  • Clorox wipes 
  • Utility hose
  • A dump station! 

The quality of your accessories will make all the difference when doing this dirty job.

Not all RV sewer hoses are made the same, and some can make the job a lot harder, messier, and more disgusting than others. 

Editor’s Note: I tried the cheap, flimsy RV sewer hoses ONE TIME and vowed I would never go back! It was an awful experience, the sewer hose slithered around like a snake and the attachments were impossible to screw on.

Now, I use the Rhino Extreme sewer hose kit (shown in photo above) because it’s rigid and stays in place. It’s a bit pricey, but I promise you it’s worth it… I’ll never use another brand!

Most RVers recommend having a clear attachment so you can see the color of the water draining as you rinse out your tanks. It might seem gross, but it’s a fact of life and it’s the only way you can know if your tanks are actually clean! (The Rhino kit comes with one, so no worries on that.)

How to Dump Your RV Waste Tanks – RV Plumbing System Basics

travel trailer water lines

RVHQ Tip: always dump your black tank first. Dumping your grey tank after your black tank helps rinse out the sewer hose and remove any remaining sewage or debris.

  • Put on gloves. 
  • Hook up your RV sewer hose to your RV sewer hose hookup, and give it a good tug or jiggle to make sure it’s locked in place. 
  • Put the other end of the sewer hose into the dump port on the ground. Be sure this is secure in the hole. Sometimes there will be a large rock or cement block to put on the top of the hose to hold it in place.
  • Once you’re sure everything is tight and secure, slowly start to open the black tank valve. If the hose is remaining tight and secure, you can open the waste valve all the way. 
  • Once the black tank is empty, close the valve.
  • Hook up your utility hose to your black tank flush (if applicable) and flush your black tank for 10-15 minutes, then drain again and close the valve.
  • Repeat the process with your grey tank, then close the grey tank valve. 
  • Remove your sewer hose from your RV but leave it in the dump port. 
  • Use your utility hose to rinse out your RV sewer hose.
  • Put your sewer hose and utility hose away. 
  • Use sanitizing wipes to wipe down the spigot and all valves and handles on your RV that you touched during the process.

How to Find RV Dump Stations Near You

Dumping RV waste water is just a fact of life, and you can find RV dump stations all over the place. 

By law, you cannot dump RV waste water on the ground. Both grey water and black water should only ever be disposed of in an approved RV dump station. 

RV dump stations can be found: 

  • At your campsite if you have full hook-ups.
  • At campgrounds, RV parks, state parks, etc.
  • At RV dealerships.
  • At RV service centers.
  • At some gas stations.
  • At some rest stops. 

Apps and Websites to Find RV Dump Stations: 

  • Allstays RV Dumps App
  • FreeRoam App
  • RV Dump Stations App

Essential RV Plumbing System Accessories

We say “essential” because these accessories really are essential in some way or another. For example, you can’t dump your RV waste water without a sewer hose. 

And, in some campgrounds, you’re not allowed to hookup to the sewer unless you have a sewer donut and/or a sewer hose support. 

Each of these essential accessories has a link to a recommended product on Amazon and a brief description of why you need it. 

Important: RVers should carry two hoses. You need a potable water hose AND a utility hose. Your utility hose can be a garden hose, and you can use this hose for everything from rinsing your feet to washing your RV or rinsing your sewer accessories. NEVER store your utility hose and potable hose together.

  • Water Filter – A water filter is essential for filtering out sediment from varying water sources. Some campgrounds have a lot of sediment in the water that can damage your RV plumbing.
  • Water Pressure Regulator – Campgrounds do not regulate their water pressure, but your RV can only handle 40-60 PSI. Some campgrounds have 100+ PSI and can rupture your RV pipes.
  • RV Sewer Hose and Clear Attachment – This is essential for dumping your tanks.
  • RV Sewer Donut – This is a sewer port attachment that helps your sewer hose stay in securely. Some campgrounds require this. 
  • RV Sewer Hose Support – This keeps your RV up off the ground and provides a slope for draining. Required by some campgrounds and RV parks.
  • Extra RV Waste Valves – Essential to have if one of your waste valves fails and starts leaking. 
  • Potable Water Hose – For drinking water only. Be sure to get a potable hose that’s rated specifically for drinking water.
  • Utility Hose – For everything else. 

Storing Your RV Plumbing Accessories

Always store your fresh water supplies in a sanitary container that’s watertight and never cross-contaminated with other things. 

Editor’s Note: I like to use clear plastic totes to organize my sewer accessories and I label the exterior so I never mix them up. 

All of my fresh water supplies like fresh water hose, water filters, and water pressure regulator all go in one tote. I keep this tote clean and dry and I clean it with a bleach water spray bottle mixture every few months to keep it sanitized. 

All my sewer supplies go in a designated sewer tote that I store away from my fresh water tote. If you have to store them together, store your sewer tote on the bottom.

Wrapping Up RV Plumbing System Basics

This RV Plumbing System Basics is a beast of a guide, and I hope by now you have a solid understanding of how the RV plumbing system works. And how to actually use it, clean it, and dump it!

The RVHQ editors are constantly adding to this post and updating it to keep the information fresh, and adding additional insight when we find it. 

RVing Headquarters Team

RVing Headquarters is operated by long-time RV enthusiasts with over 8 years of RV industry expertise and full-time and part-time RV ownership experience. From motorhomes to trailers and campervans, we've done it all. Our Mission: to inspire, educate, and entertain anyone who is interested in the RV lifestyle.

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How To Blow Out RV Water Lines

How To Blow Out Water Lines In RV – Step-By-Step DIY Guide

Aaron Richardson

  • Last Updated: March 2, 2024
  • 7 minutes read

Blowing out the water lines in your RV before winter storage is crucial to prevent freezing and cracks. We’ve winterized countless RVs over the years. Trust us when we say blowing out your water lines before storage is absolutely important to prevent pipe damage. So, we will show you exactly how to properly blow out RV water lines using an air compressor. 

Summary/TL: DR

Properly winterizing your RV by blowing out water lines is critical to prevent pipe damage from freezing. We will cover the key steps to force all moisture out of the plumbing system using an air compressor:

  • Safely drain and flush all water tanks before blowout
  • Attach a plastic blowout plug to the city water inlet
  • Connect an air compressor at optimal 30-40 PSI setting
  • Open valves one at a time to force air through each line
  • Disconnect compressor and bypass hot water heater
  • Add antifreeze after draining to displace leftover moisture
  • Extra tips for winterizing campers, checking for leaks, adding insulation
  • Recommendation for quality oil-free air compressor

How To Blow Out RV Water Lines?

Step 1 : Turn Off the Water Heater and Allow the Lines to Cool

Turn off the gas and electric power to the RV water heater. This stops it from reheating and burning you during the blowout process.

Also, open the pressure relief valve to allow hot water to drain out faster. Wait at least 24 hours for all lines to cool to a safe temperature.

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Step 2 : Drain and Flush All Waste Tanks

Open the release valves and drain out all freshwater, greywater and blackwater tanks completely. This clears the pipelines and allows you to route the incoming air pressure through the valves.

Use a tank disinfectant cleaner before refilling to keep tanks hygienic.

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Step 3 . Disconnect Any Inline Water Filters

Unhook any in-line water filtration units, softeners or purifiers that are attached to your RV’s plumbing system. This allows unobstructed airflow to push out the remaining water from the pipes.

Step 4 . Open All Faucets to Drain Out Lines

Once tanks are drained, open up all faucets, including the shower, bathroom sink taps, kitchen taps, etc. Verify both hot and cold lines are opened up fully.

This depressurizes the plumbing lines and lets gravity pull out all the remaining droplets of stagnant water stuck inside that the blowout will push out forcefully.

Let the faucets run for a few minutes until the dripping stops completely.

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Step 5 . Connect Blowout Plug to City Inlet

Find the city water connection inlet, a special portal for sending pressurized water into the RV’s plumbing system. Remove any existing hoses.

Then, firmly screw in the plastic blowout plug and attach an extension hose leading to the air compressor. This creates a sealed pathway to supply high-pressure air.

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Step 6 . Attach Air Compressor to Blowout Plug

Connect the air compressor using the extension hose and preset it to 30 to 40 PSI output pressure. Do NOT exceed 50 PSI to avoid damage.

Use a compressor with minimum 10-gallon tank size and output volume capabilities for optimal home winterization needs.

Here are improved steps 7-10 with more details:

Step 7 . Blow Air Through Plumbing Lines

Turn on the air compressor to send pressurized air into the RV’s plumbing lines. Open one water line valve at a time and let the air blast through for several minutes to force out all traces of water.

Make sure to blow air separately into both cold lines and hotlines connected to the water heating system.

Listen for any sputtering or gurgling sounds that indicate trapped water escaping successfully from pipes.

Step 8 . Turn Off the Compressor and Disconnect

Once done, turn off the air compressor before disconnecting to avoid any accidents due to pressure differences. Unscrew the blowout plug and detach the compressor hose.

It helps to have a second person controlling the compressor ON/OFF switch when disconnecting.

Step 9. Bypass Water Heater Lines

The water heater tank can hold 5-6 gallons of water at once. To save on antifreeze usage, install bypass valves to isolate and eliminate this section when winterizing the RV pipes.

Use an automatic diverter kit specifically sized for your RV water heater make and model rather than temporary plugs.

Step 10. Pour Antifreeze Into Lines

After the blowout, pour RV-safe antifreeze into horizontal pipe runs and drains via the city water inlet to displace any remnants of moisture.

Use a non-toxic propylene glycol formula antifreeze for best results.

One gallon is usually sufficient for most RV classes. Smaller campers may need less quantity. Let the mixture flow into all branches by turning ON the water pump briefly.

Blowing Out Water Lines In RV With Air Compressor

As RVers, we recommend using a high-powered air compressor when winterizing to force water out of the pipes.

  • Hook up a quality compressor in Step 6 when attaching the blowout plug. Wear protective gear – the pressurized air is loud!
  • It has a durable pump for consistent airflow even under heavy use
  • The large 16-gallon tank has greater capacity than smaller models
  • No need to stop and wait for the tank to refill!
  • We’ve tried cheaper compressors before, but they tend to overheat quickly.
  • Investing a little more gives you reliability that saves tons of time and prevents burst pipes all winter.
  • As an RVer, this is one winterizing accessory we think is well worth spending extra money on year after year.

Blowing Out Water Lines In Camper

Blowing out the water lines in smaller campers follows nearly the same winterizing process, but we have a few extra tips:

  • Camper trailers and pop-ups tend to have pretty basic plumbing compared to larger RVs. So take time to trace all the hot and cold pipe runs throughout before getting started. Missing one line can spell disaster.
  • For the antifreeze fill step, calculate the specific amount needed based on your actual freshwater tank capacity after draining. Too much antifreeze is just wasted money.
  • For these compact trailers, we recommend using 2 gallons or less unless you have an unusually large freshwater tank.
  • Once finished, thoroughly inspect underneath the entire camper exterior. Check for any drips or puddles indicating blown air pushing water out of unnoticed cracks or unsealed joints.
  • Catching a leak early makes a quick fix now versus a much bigger issue if left unaddressed over the freezing months in storage.

How Much PSI Do You Need To Blow Out My RV Water Lines?

Use the above table as a guideline for setting the right pressure based on your RV type. Do not exceed the 50 PSI limit or risk damaging plumbing lines.

When Do You Need To Blow Out My RV Water Lines

Here are the signs indicating it’s time for a blowout:

  • Freezing nighttime temperatures in your storage area
  • Planning to store RV through winter months
  • Notice leaks, drips, or cracks in the water system
  • RV has remained unused/unwinterized for over 6 months

Ensuring System Integrity Post-Blowout

After completing the RV water line blowout, we take a few extra steps:

  • Double check all valves and drains are CLOSED tight to prevent contamination.
  • Use a flashlight to inspect all piping for missed damp spots indicating leftover moisture. Press joints by hand to feel for drips.
  • Recheck compressor fittings and accessories to ensure proper winter storage.
  • For cold climates, add supplementary foil-backed pipe insulation to prevent cracks from deep freezes.

A User Tip, I agree with:

“When trying to loosen stuck drain valves, always start by pouring hot water mixed with dish soap into the tanks. Let it sit for 10-15 minutes. The heat and detergent help dissolve solid buildups which may be preventing valve movement. If that doesn’t work, carefully use a plumber’s snake to break up debris clogs from the outside going inwards. Lubricating valves and cables are key to preventing this issue year after year.” – Dave from RV Travel

Tools and Materials

Gather these supplies before getting started:

  • Air compressor (min 10 gal capacity)
  • Blowout plug
  • Water tank disinfectant
  • RV antifreeze (between 1-3 gallons)
  • Hose/attachments to connect air compressor
  • Gloves, eye protection
  • Bypass kit for water heater

Following proper technique for winterization and blowing out RV water lines prevents expensive plumbing repairs and keeps your system ready for next season’s adventures! Reach out with any questions.

Aaron Richardson

About Author / Aaron Richardson

Aaron Richardson is an expert RVer and the co-founder of RVing Know How. Aaron, along with his wife Evelyn, has been living and traveling in their Keystone Fuzion RV since 2017. Their adventures span across the country and beyond, including memorable RVing experiences in Mexico. Aaron's passion for the outdoors and RVing shines through in his writings, where he shares a blend of travel stories, practical tips, and insights to enhance the RV lifestyle.

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Thanks for the great information, it is very helpful. One thing I didn’t see is that you didn’t mention putting some antifreeze in the P-traps under any sinks. Mine has frozen and busted in the past.

Marcin

great tip! thanks

Jess

If you are going to pump antifreeze through all the lines with the water pump anyway, why blow out the water first?

Tim

Water can dilute the antifreeze making it less effective. Just an extra step to assure your pipes stay safe.

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travel trailer water lines

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How Do RV Water Systems Work?

travel trailer water lines

Most RV water systems can operate as self-contained systems – meaning you draw from a tank of potable water on board. This tank is usually called your freshwater holding tank. This must be sanitized regularly to ensure safe water for drinking, dishes, and more.

Potable: (adj.) safe to drink

Your RV water system pumps water throughout your coach using a water pump – a device that pressurizes the plumbing lines to drive water from the freshwater tank out through your faucets, fixtures, and hot water heater. The water heater must be turned on to heat water, which the pump distributes to hot water lines.

Your RV water system also heats and distributes water to fixtures when connected to a city water source . A check valve in your water pump prevents your fresh water tank from filling when connected to city water. Another check valve at the city water inlet prevents water from flowing backward out of the inlet when the pump is running.

City water: (n.) a municipal water supply. In the case of RV parks, it can sometimes refer to water pulled from a local well and distributed via underground mains to campsite spigots.

RV Water System RV Plumbing Diagram

Here’s a quick diagram of the basic design of RV water systems:

RV Water System Diagram-how-do-rv-water-systems-work-02-2023

Disclaimer: This general diagram may not be 100% accurate for all RVs. Consult your owner’s manual or contact your RV manufacturer for an up-to-date diagram of your RV’s water system.

RV Water System Components

Here are the various components you’ll find in most RV water distribution systems:

Pressure Regulator

pressure-regulator-how-do-rv-water-systems-work-02-2023

Most RVs require the use of an external pressure regulator installed at the spigot if you’re connecting to city water. However, some units have a built-in regulator at the city water connection on the RV’s exterior wall. Most regulators also have backflow preventers and strainers to keep debris out of your RV’s water system.

External and built-in models protect your water pump and system components from damage that can be caused by unregulated city water pressure. City water hookups can have pressures at high as 150 PSI (pounds per square inch). A pressure regulator reduces that pressure to an acceptable level for your RV – usually between 40 and 50 PSI.

Learn more about why you need a water pressure regulator for your RV.

RV Water Filter Systems

filter-systems-how-do-rv-water-systems-work-02-2023

Some RVs are equipped with a water filter built into the distribution system. Others require installing an external water filter at the spigot (but after a pressure regulator, if applicable).

Onboard filtration systems are typically installed in an underneath compartment or under the kitchen sink. They are usually cartridge-style filters that remove impurities that affect the incoming water’s texture and taste.

Onboard and external water filters must be replaced regularly according to the manufacturer’s recommendation. Water quality standards differ dramatically from region to region and campground to campground, so some water filtration mechanism is vital to safe RV adventures.

Learn more about getting clean drinking water in your RV.

Potable Water Tank (Fresh Water Tank)

water-tank-how-do-rv-water-systems-work-02-2023

Potable water tanks are often made of polyethylene or a similar plastic material. The number of gallons of water these tanks hold depends on the make and model, as well as sometimes based on supply chain availability.

Most RVs have a permanent fresh water tank built into the RV in manufacturing, but some have a small, removable tank. Permanent RV potable water tanks are filled via a labeled fill port on most RVs’ off-camp side – opposite the main entry door.

In-line Strainer

inline-strainer-how-do-rv-water-systems-work-02-2023

Most modern water pumps include a built-in strainer, but older RVs may have a separate in-line strainer installed between the water tank and the pump. These inline filters are simple screens that collect dirt, sand, and other debris before they can damage your water pump, check valves, vacuum breakers, and faucets. They do not filter the same impurities as a water filter.

RV water systems distribute water in three main ways: by a demand pressure system, a city water pressure system, or a manual pump system.

A demand pressure system utilizes a water pump powered by a small 12-volt motor. Most RV water pumps pressure to a range of 40-50 PSI. An internal pressure switch turns the pump off when the set pressure is reached.

Most water pumps are also equipped with a strainer and check valve. The strainer removes large sediments that could damage the pump. The check valve prevents water from flowing backward through the pump into your potable water tank when connected to city water.

A city water pressure system relies on the pressure supplied by a potable water source from a spigot. It requires a water pressure regulator to decrease pressure to a safe level for RV plumbing.

A manual pump system utilizes a foot or hand-operated pump to pressurize the system and distribute water from the tank to the fixtures.

Technician Tip: There was a fourth method for water distribution – air pressure. This method utilized an onboard air compressor to pressurize the system in place of a water pump. But it was more common on older RVs and is rarer to find now. Should you come across a pneumatic system, become fully trained in the use and maintenance of the system before use.

These systems will contain a very high volume of pressure, and severe injury can occur if extreme caution is not exercised. Also, the compressor must be food grade and likely oilless. Using the wrong compressor or maintaining it incorrectly can contaminate the potable water system.

Most RV fresh water distribution systems are designed to utilize two potential supply sources – demand pump (via your portable water tank) and city water are the most common.

Shut-Off Valve

shut-off-valve-how-do-rv-water-systems-work-02-2023

The shut-off valve in an RV water system keeps water in the tank if repairs are required in other parts of the distribution system. Closing the valve allows for repairs without draining the tank.

Piping/Tubing

piping-how-do-rv-water-systems-work-02-2023

According to NFPA 1192, the piping that transports water from that tank to your fixtures must be rated for use with potable water. Pipes and tubes transporting hot water must also be rated for hot water use.

The most common piping material used in today’s RVs is CPVC or polyethylene cross-link tubing (PEX). Other common materials include PVC and polybutylene. The materials must be rated for hot and cold installations, and the requirements for material, type, size, installation, and support are all outlined in NFPA 1192.

Water distribution piping is often red or blue but may be transparent or opaque. RVs with red and blue piping make identifying hot and cold water lines easier, but additional testing is required to determine if the lines are hot or cold for models with transparent or opaque piping.

Accumulator

accumulator-how-do-rv-water-systems-work-02-2023

An accumulator tank is mostly found on higher-end units but can be added to any unit by a professional RV technician. It’s a small water storage tank (usually made of ABS plastic or metal) that’s located downstream from the water pump to help maintain consistent water pressure, reduce water sputtering, and minimize the cycling of the water pump.

Internally, an accumulator is divided into two halves, separated by a rubber membrane. The user will pressurize half of the accumulator by adding compressed air through a Schrader valve, typically to 30 PSI. The water system will add pressurized water to the other half.

When there is no demand on the system, the pressure is stored inside the tank and will be immediately released when a fixture or valve is opened. This provides immediate high-pressure water flow without delay. The water system then keeps the water flowing.

If the water pump is being used, the accumulator will absorb the pulsations caused by the pumping action. This provides a smoother, more city-water-like experience. The air pressure is adjustable to fine-tune the performance to the user’s preference.

Water Heater

RV water heaters supply hot water to your fixtures and run on 120-volt AC power, propane, or both. Many RV water heaters today are known as DSI (direct spark ignition) water heaters. That means there’s no pilot light to be lit manually before each use.

Water heaters that use propane must be listed for RV use because they must be designed and tested for the added vibrations and bouncing that come with the RV lifestyle. You’ll also see ‘on-demand’ or ‘tankless’ water heaters in many new RVs.

Certain water heater installations may also include a bypass kit for easier winterization. This kit eliminates the need to fill the water heater with antifreeze to protect the tank and your hot water lines from freezing temperatures. Bypass kits can include 1-3 manual shut-off valves.

Technician Tip: Winterization shut-off valves should NOT be closed when winterizing a tankless, on-demand, or hydronic (boiler) water heater, as they MUST be protected from freezing by displacing all water with RV antifreeze.

fixtures-how-do-rv-water-systems-work-02-2023

Most RVs are equipped with the following common fixtures: tubs, toilets, indoor and outdoor showers, and kitchen and bathroom sinks. These fixtures are the final element in your RV’s water distribution system before the water enters your RV’s plumbing system for waste collection.

Approved RV fixtures must be listed and installed by the terms of that listing, such as those stipulated by the National Sanitary Foundation ( NSF ) and the International Association of Plumbing and Mechanical Officials ( IAPMO ).

Low-Point Drains

low-point-drain-how-do-rv-water-systems-work-02-2023

The low-point drains in an RV water system allow you to drain the system using gravity. However, the potential for low spots in the distribution system requires blowing out the lines using an air compressor or filling them with RV antifreeze when winterizing your RV.

Technician Tip: Due to the potential for freeze damage, there is no warranty at Camping World for the Basic Winterize Package (blowing lines out with compressed air). The Complete Winterize package includes blowing the lines out with compressed air and filling the lines with RV antifreeze, which carries Camping World’s standard warranty.

Contact a Camping World Service Center to learn more about RV winterization services.

How to Maintain Your RV Water System

Now that you understand the basic operation of RV water systems, here are some tips to help you keep yours running smoothly and efficiently:

  • Always use a pressure regulator and water filter when connecting to city water. 
  • Always use a water filter when filling your fresh water tank from a potable water source.
  • Sanitize your fresh water tank before each use. Most RVers do this annually after dewinterizing their RV in the spring . Others do it every time their RV has sat without use for more than 2-4 weeks. Learn how to sanitize your fresh water tank.
  • Winterize your RV properly. Learn the basic steps for RV winterization in this tutorial.
  • Drain your water heater regularly and check the anode rod (for steel tanks). 

When you know how it functions, anything is easier to work on or troubleshoot. Hopefully, you now have a better understanding of RV water systems. Still, you can always contact an RV service advisor at your local Camping World Service Center if you need assistance.

Do you have any questions about RV water systems? Let us know in the comments below.

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Dave Solberg

Learn About Different RV Water Lines

  • Description

RV water lines have changed over the years. Older style RV water lines used to be a hard plastic with a lot of metal elbows and crimp ends. These lines were very susceptible to freezing and would have leaks caused by vibrations from driving on the highway.

Newer generations are starting to use plastic pipes with a more user-friendly style featuring flared fittings. Many of these new RV water lines that are being used are residential style or the new Pex ½-inch tubing. The tubing is perfect for RV water lines for many reasons, including the fact that they come in colors – blue for cold and red for hot.

With pressure your RV will get from connecting to city water fills these tubes allow more flow on the inside of the unit and through all of the RV water lines. Plus, Pex does not have a lot of taste inside the tubing so you will not get a lot of added taste to water.

Pex tubing can expand up to one and one-half of the original size without splitting. This is great should the pipes get cold and freeze during the winter months.

Newer plastic RV water lines are easy to work with. You can easily select the lengths of tubing you need and cut off with the proper tool. The flared system makes it easy to slide pipe in using a compression fitting over it. Your new water lines can also be upgraded with different features, such as elbows, Ts and shut off valves.

With these new Pex tubing you will have the ability to add things to bigger pipes and relocate items throughout your RV’s water system. There are definitely more options available using the newer tubing systems than the older metal and less durable water pipes.

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Shooting Star

How to Access Water Lines in RV: 6 Steps [DIY]

Last Updated on September 19, 2023

You may need to access your RV’s water lines if they develop leaks or require maintenance. Accessing the water lines of an RV is impossible without proper knowledge and tools.

To access the water lines in your RV, you need to consult your RV owner’s manual to locate the water lines. Your RV water lines are often concealed behind drawers, underneath the vehicle, or inside compartments.

After locating the actual area, you need to remove the outer part of the area. Once that’s done, you can access your RV’s water line.

Alright, let’s break it down and get into the basics of accessing those RV water lines. We’ve got your back and will ensure you know exactly what to do.

Table of Contents

Steps on How to Access Water Lines In RV

Steps on How to Access Water Lines In RV

Here are a few quick steps that you can follow to gain access to your RV’s water lines.

Step #1: Gather the Necessary Tools

Step #2: consult the rv owner’s manual to identify access points.

Step #3: Remove Panels or Compartments 

Step #4: Remove Drawers Or Cabinets

Step #5: inspect the underbelly and floor, step #6:  reassemble.

Let’s take a deeper look at the steps.

Gather all the tools you’ll need, like a screwdriver, pliers, adjustable wrench, flashlight, and any other tools specific to your RV model. Make sure to have all the necessary tools before starting the task to avoid unnecessary delays.

A flashlight is especially important, as it’ll help you see any hard-to-reach areas where the water lines may be located.

Once you have all the tools, make sure they’re in good working order and easily accessible. You don’t want to be scrambling to find a missing tool in the middle of the job.

Check your RV’s owner’s manual to find the water lines. It provides essential information on where the water lines are located and how to access them. Water lines in RVs are usually hidden behind underneath the vehicle, drawers, or inside compartments.

Locate access points and carefully follow any special instructions given. With the help of the owner’s manual, accessing your RV’s plumbing system will be a breeze.

Step #3: Remove Panels or Compartments

Now it’s time to get hands-on and use your screwdriver to take off the panels or compartments obstructing your view of the plumbing.

Before you begin, ensure you have the appropriate tools and a container to hold any screws or fasteners you remove.

Follow these steps to remove the panels or compartments:

  • Locate the screws or fasteners holding the panel or compartment in place.
  • Use your screwdriver to remove the screws or fasteners.
  • Gently pull the panel or compartment away from the wall or ceiling, being careful not to damage any wiring or plumbing.

Once you have removed the panels or compartments , you should have a clear view of the water lines. If you still cannot access the water lines, you may need to remove drawers or cabinets to reach them.

If the water pipe is located inside of drawers or cabinets, you will need to remove the drawers or cabinets to access those hidden pipes.

Once you’ve emptied the contents of the cabinets or drawers, locate any screws or fasteners that hold them in place.

Use a screwdriver or drill to remove these screws carefully, and set the components aside in a safe place.

You need to remove the cover of your RV’s underbelly and floor if the access point is there. This usually involves unscrewing panels or removing fasteners.

When you have access to the underside of your vehicle, check the water lines for cracks, holes, and wear. If you spot any damage, make sure to repair or replace the affected sections before reassembling the underbelly.

For the flooring, look for any removable sections or panels that provide access to the water lines. Once you’ve removed these sections, look closely at the water lines for any signs of damage or leakage. Inspect the fittings and connections as well, as they can also be a source of leaks.

Once you have inspected the water lines and made any necessary repairs or replacements, it’s time to put everything back together. Follow these steps to reassemble the panels, compartments, drawers, or cabinets:

  • Make sure all the components are clean and free from any debris or dirt.
  • Align the compartments, panels, drawers, or cabinets with their original positions.
  • Insert the screws or fasteners back into their respective holes and tighten them using a screwdriver or drill. Be careful not to overtighten and strip the screws.
  • Double-check that all the components are securely in place and properly aligned.
  • Test the stability of the panels, drawers, compartments, or cabinets by gently pushing and pulling on them to ensure they are firmly attached.
  • Once you’re confident that everything is back in place, clean up your work area and put away any tools or equipment.

What types of water lines are used in RV?

What types of water lines are used in RV

RVs commonly use either copper or plastic piping for their water supply. Copper is more common in older models, while plastic, specifically PEX pipe, is the modern material of choice.

Although copper pipes are known for their durability and resistance to corrosion, they are not as flexible as PEX pipes and may be more difficult to install or repair.

PEX pipes are made of a flexible plastic material called cross-linked polyethylene, which makes them much easier to work with than copper pipes. They are also more resistant to freezing and bursting, which is a common problem in RVs during colder temperatures.

What are some common causes of RVwater line leaks?

If you’re experiencing leaks in your RV’s water system, age and wear, freezing temperatures, or poor installation could be the culprits.

Over time, constant exposure to water pressure, temperature changes, and vibrations can cause the water lines to deteriorate. This leads to cracks, fractures, or weakened connections.

Exposure to freezing temperatures can also accelerate the wear and tear of the pipes, which can result in them bursting or cracking.

To prevent water line leaks, you have to use high-quality materials during installation and ensure that the plumbing system is installed correctly.

Do You Need to Winterize Your RV Water Lines?

Winterizing your RV is essential to prevent damage from freezing temperatures. You’re at risk of cracking or bursting your RV water lines if you live in a cold climate. Water expands as it freezes, and any water left in your RV’s pipes can cause them to burst, leading to expensive repairs.

To winterize your RV’s water lines, drain all the water from the tanks, pipes, and faucets. Open all the valves and drains and let the water drain. Once all the water has been drained, you must use antifreeze to protect any remaining water from freezing.

At what temperature do RV water lines freeze?

At what temperature do RV water lines freeze

RV water lines can freeze when the temperature drops below 32 degrees Fahrenheit (0 degrees Celsius), but they typically freeze around 20 degrees Fahrenheit.

Depending on the RV’s insulation, the location of the water lines, and the length of time exposed to cold temperatures, freezing temperatures can vary.

To prevent RV water lines from freezing, make sure to properly insulate the RV and ensure that the water lines are in a location that is less exposed to the cold. Also using heat tape or a space heater can also help keep the water lines from freezing.

Efficiently Maintain Your RV Water Lines with Easy Access

Congratulations, you’ve successfully accessed your RV’s water lines. With the steps outlined in this article, you can confidently tackle any repairs or maintenance needed to keep your RV’s water system in tip-top shape.

Remember, there are different types of water lines used in RVs, so it’s important to identify what type you have before making any repairs. Also, leaks are a common issue with RV water lines , so regular inspections and maintenance can prevent costly repairs.

Taking good care of your RV’s water system means years of worry-free road trips. Let’s ensure you’re ready to hit the road without any water system headaches.

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The Plumbero

How to Keep RV Water Lines from Freezing

Keeping RV water lines from freezing is a crucial concern for those who enjoy camping and traveling in their recreational vehicles during the cold winter months. Freezing temperatures can lead to frozen pipes and plumbing issues that can be costly and inconvenient. In this comprehensive guide, we will explore effective methods and tips to prevent RV water lines from freezing.

From techniques like opening cabinet doors to allow heat in, heating the bays, using heat tape on RV pipes, and skirting your RV, to practical advice such as closing the gray valve and using onboard freshwater, this article will provide a step-by-step approach to safeguarding your RV’s plumbing system from winter-related damage.

Whether you’re a full-time RVer or just an occasional traveler, understanding how to keep RV water lines from freezing is essential for a comfortable and stress-free journey during the colder seasons.

The Risks and Challenges of RV Water Lines Freezing in Cold Weather

One of the biggest risks and challenges that RV owners face during cold weather is the freezing of their water lines. This can be a major inconvenience and even lead to costly repairs if not properly addressed. In this guide, we will explore the potential dangers of frozen water lines in an RV and provide tips on how to prevent it from happening.

Why Do RV Water Lines Freeze?

RV water lines are susceptible to freezing because they are exposed to the outside elements and often not insulated. When temperatures drop below freezing, any standing water inside the lines can quickly turn into ice, causing blockages and potentially damaging the pipes. This is especially common in older RVs that may have outdated or inadequate plumbing systems.

The Dangers of Frozen RV Water Lines

Aside from the obvious inconvenience of not having access to running water, frozen RV water lines can lead to more serious issues. As the ice expands inside the pipes, it can cause them to crack or burst, resulting in costly repairs. It can also damage pumps and other components in the RV’s plumbing system. In extreme cases, a frozen water line can even cause a complete shutdown of the RV’s water system.

10 Methods How to Keep RV Water Lines from Freezing

1. insulate the water lines.

Insulating your RV’s water lines is one of the best ways to prevent them from freezing in cold temperatures. You can do this by wrapping insulation around the pipes or using special insulated covers that are designed specifically for RV water lines. This will help to keep the pipes warm and prevent them from freezing up.

2. Use Heated Water Hoses

If you’re looking for an even more effective way to keep your RV’s water lines from freezing, consider investing in a heated water hose. These hoses are designed with a built-in heating element that keeps the water inside warm enough to prevent it from freezing, even in extremely cold temperatures.

3. Use Antifreeze

Using antifreeze is another great way to protect your RV’s water lines from freezing up in cold weather. Simply pour some antifreeze into your RV’s fresh water tank before winter sets in, and it will help to keep the water inside warm enough so that it won’t freeze.

4. Increase Your RV Insulation

Increasing your RV’s insulation is another effective way to keep its water lines from freezing in cold weather. Make sure that all of the walls and windows are properly insulated, as this will help to keep the interior of your RV warm and prevent any of its pipes from becoming frozen during winter months.

5. Install Heat Tape on Pipes

Installing heat tape on any exposed pipes is another great way to keep them from freezing during cold weather months. Heat tape is a type of electrical wiring that can be wrapped around pipes and plugged into an outlet, which will provide just enough warmth to keep them from becoming frozen over time.

6. Keep Your Freshwater Tank Full

Keeping your RV’s fresh water tank full at all times is another great way to protect its water lines against freezing temperatures during winter months. The fuller the tank is, the less likely it will be for any of its pipes or hoses to become frozen over time due to a lack of insulation or heat loss through evaporation or condensation buildup within the tank itself.

7. Install a Water Heater

Installing a small electric or propane-powered water heater near your RV’s plumbing system is another effective way to ensure that its pipes don’t freeze over during winter months when temperatures drop significantly low outside. The heater will provide just enough warmth throughout the system so that none of its components become frozen over time due to a lack of heat transfer between internal surfaces within the plumbing system itself.

8. Move Your RV Indoors During Winter Months

Moving your RV indoors during winter months is one of the most effective ways you can guarantee that its plumbing system won’t become frozen over time due to extreme cold temperatures outside. If you don’t have access to an indoor space large enough for your vehicle, consider renting storage space at a nearby facility instead.

9. Use Pipe Covers

Using pipe covers can also help insulate your RV’s plumbing system against extreme cold temperatures outside. Pipe covers are made out of thick materials such as foam or rubber, which provide extra insulation against extreme temperatures. Just make sure you purchase covers specifically designed for use with RVs, as these have been tested for durability against harsh weather conditions.

10. Keep Your Cabinets Open During Winter Months

Finally, keeping your cabinets open during winter months can also help reduce condensation buildup within them, which could otherwise lead to ice formation on exposed metal surfaces such as those found within plumbing systems.

By opening up these cabinets periodically throughout winter, you’ll allow air circulation within them, thus reducing chances for ice formation on any exposed metal surfaces, which could potentially damage their integrity if left unchecked.

Things to Consider When Keeping RV Water Lines from Freezing

One of the biggest challenges for RV owners during the winter months is keeping their water lines from freezing. While there are several methods and products available to prevent water lines from freezing, it’s important to understand some key factors that can affect the effectiveness of these solutions. Here are some things to consider when trying to keep your RV water lines from freezing:

Temperature:

The most obvious factor that affects whether or not your water lines will freeze is the temperature outside. If you’re in an area where temperatures regularly drop below freezing, you’ll need to take extra precautions to keep your pipes from freezing.

Insulation:

Proper insulation is key when it comes to preventing freezing pipes. Make sure your RV is well-insulated , especially in areas where water lines run through. You can also add extra insulation around exposed pipes or use heat tape to keep them warm.

Heat source:

Another important factor is having a reliable heat source inside your RV. This could be a furnace, space heater, or even electric blankets. Just make sure to follow safety precautions and never leave any heat sources unattended.

Common Mistakes to Avoid When Winterizing Your RV

During the winter season, many people prefer to take their RV for a trip or head to their favorite campsite. However, with the freezing temperatures, it’s crucial to properly winterize your RV to prevent any potential damage that could occur due to frozen water lines.

Mistake #1: Not Properly Draining the Water System

One of the most critical steps in winterizing an RV is to drain the water system completely. Many people make the mistake of not fully draining their water tanks, which can lead to frozen pipes and potential damage. It’s crucial to open all faucets and drains, including the hot water tank, until there is no more water coming out.

Mistake #2: Not Adding Enough Antifreeze

Another common mistake when winterizing an RV is not adding enough antifreeze to the system. It’s crucial to use enough antifreeze to ensure that all of your water lines are protected against freezing temperatures. Follow the manufacturer’s instructions for how much antifreeze to use, and make sure to add it to all faucets, drains, and toilets.

Mistake #3: Not Properly Insulating Exposed Piping

Exposing pipes can be a major issue during winterization. If any of your water lines are exposed to the freezing temperatures, it can lead to them freezing and potentially bursting. It’s essential to properly insulate all exposed piping with foam pipe insulation or heat tape.

At the end of the day, your water lines are an integral part of properly maintaining your RV and keeping it functioning at its best. Keeping them from freezing is essential for this, so following the tips provided in this blog post will help you protect your waterlines, and keep them running smoothly all year round.

So don’t neglect this important task — be proactive about learning how to keep RV water lines from freezing today! With a little bit of knowledge and effort, you can ensure that your RV water system continues to run smoothly through even the coldest winter days — ensuring that you can enjoy comfortable temperatures and reliable plumbing all season long!

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How To Unclog RV Water Lines ? [5 Simple Steps]

After a rough winter spring fills one’s heart with sheer joy. This calls for some camping trips in the sunshine. But your RV needs some maintenance work. Unclogging RV water lines must be one of the first things on your to-do list.

But, how to unclog rv water lines?

To unclog the RV water line, drain all of the water from the water heater . After that, you must locate the low point drains.

All of the water in the freshwater lines must be drained. After that, you should clean the holding tank . Finally, you need to flush the freshwater tank with bleach followed by clean water .

Easy right? Let’s check out the step-by-step guide on this topic that we have prepared for you!

5 Simple Steps to Unclog RV Water Lines

A clogged water pipe in an RV can be a major issue. It takes a bit of manual labor and some technical prowess to unclog it. It’s not that hard like removing the RV window screen . It’s one of the first things you should do while performing routine RV maintenance. 

The health hazards one can face for clogged water line is threatening.Yet, if you follow the easy actions outlined below, you can avoid this.

Step 1: Draining the Water Heater

The first thing you should do is turn off your water heater. To do this, first, locate the power switch of your water heater. Then turn off the power heater. After you’re done with this search for the drain plug. 

It is usually located near the lower left side. Once you’ve found it remove the drain plug. Finally, unlock the pressure release valve to start draining the water. 

Step 2: Pointing Out the Low Point Drains

The function of the low point drains is to drain out all freshwater lines. In general, these can be found at the bottom of the RV. Before moving on to the next phase, you must first locate them.

You should also consult the manufacturer’s user manual. They are often pointed out in the instruction manual. They’re located at the lowest point of your RV’s water system. 

Locating them is as easy as keeping the RV door open . Some of the RVs have two low points, for hot and cold water. While others may have three separate low points. 

Unlock the lines once you’ve found them. The draining process will begin as a result of this. While the water is draining open the faucets located in the sink and washroom. 

Also, flush the toilet to increase the effectiveness of the draining process. This will sanction the utmost drainage of water. Once the water stops draining close up the lines.

Step 3: Cleaning the Holding Tank

After you’ve drained all the freshwater lines, open the drinking water hold tank. You should drain all of the water from the tank and then empty it. If there’s a bit of remaining water, run the pump. This will force out all the residual water. 

But there is a catch! Make sure you don’t keep the pump operating after draining is complete. Otherwise, your motor might stop working and burn out.

Step 4: Flushing the Fresh Water Tank with Bleach

After cleaning the holding tank, close the valves. The next action is to use a bleach solution to flush your freshwater tank. A bleach water solution is needed to do this task. Approximately half of a cup of bleach is needed to mix with 30 gallons of water.

Both of them will work perfectly to achieve your desired result.

Now, fill the fresh water tank with clean water and mentioned amount of bleach. You must be using the best faucets in your sink, washroom, or kitchen. So, next turn them all on. If there is an outdoor shower, turn that on as well. 

Keep them on till you notice the smell of bleach. This will make sure the bleach has traveled through your water line.

Finally, close all the faucets and let your RV sit overnight. The Bleach-water solution should be kept inside the water lines for approximately 12-15 hours.

Step 5: Flushing the Fresh Water Tank with Clean Water

Finally, we’ve arrived at the last task. Here you need to drain out all the bleach water solution from the tank. 

To turn on all of the faucets, use the same procedure. Turn on all the faucets situated in your sink, washroom, kitchen. Turn on the outside shower too, if you have one. 

This way empty the whole freshwater tank. It should be cleaned like the glass cleaned with the best rubber seal conditioner . 

Fill the tank with clean water once it is emptied. Then turn on all the faucets of your RV, as you did before. You need to keep the water running until the water coming out is odor-free. 

Voila! Your RV water line will be back to its prime. It will function like there was no problem at all.

Question: How do I get rid of calcium in my RV water lines?

Answer: The obvious answer is by vinegar treatment. RV experts say that you should pump a vinegar-water solution into the RV water system. You must let it sit overnight. The solution should be made at 1:1 water to white vinegar proportion.

Question: How can I remove calcium from my water tank?

Answer: Vinegar or Lye is the most useful chemical to get rid of calcium. To do this, drain all of the water in your tank, mix a vinegar-water solution and let it sit. Then flush it with clean water.

Question: Is hard water fatal for my kidneys?

Answer: If you consume hard water for a long time, it can create kidney problems. This, in turn, may cause diabetes, kidney failure, cerebrovascular disease, and much more. So, it’s better to be safe than sorry.

Bottom Line

With that, we’ve come to an end of our conversation. That was How To Unclog Rv Water Lines in a step-by-step manner. Hopefully, we could help you with your problem. If you have any further inquiry please let us know down below.

Stay safe and happy RV-ing!

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Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with Compressed Air

Antifreeze vs blowing out water lines with compressed air: which is better when winterizing your rv….

  • 1 Antifreeze vs blowing out water lines with compressed air: which is better when winterizing your RV?…
  • 2 The Broad Definition of Winterizing Your RV
  • 3 When Do You Need to Winterize Your RV?
  • 4 Do I Need to Winterize MY RV If I'm Using It in the Winter?
  • 5 Winterizing with Antifreeze vs Blowing Out Water Lines
  • 6.1 Use Low PSI
  • 6.2 Be Wary of Leftover Water
  • 7 Using Non-Toxic Anti-Freeze
  • 8 Don't Forget to Drain Your Holding Tanks!
  • 9 Just Remember: Keep Your Water Lines From Freezing While Camping
  • 10 What Method Do We Use to Winterize Our RVs?
  • 11 We Are Huge Fans of Winter Camping!

The most important part of winterizing your RV is ensuring your water lines won't freeze. You don't have to worry about this if you store your RV inside a temperature-controlled unit or in a temperate location that never drops before freezing.

However, even southern regions in the U.S. often experience freezing temperatures at some point in the winter. And even a few hours of freezing temps is enough to wreak havoc on your RV water lines.

So, it's important to know how to winterize your RV water lines. There are two main methods, and some controversy over which is better. We'll discuss both methods and answer other common winterizing questions.

If you buy something through our links, we may get a small commission at no extra cost to you. It helps keep our lights on so we can continue to provide helpful resources for RVers. Read our  full affiliate disclosure here.

The Broad Definition of Winterizing Your RV

Antifreeze vs Blowing Out

First, we must clarify that “winterizing” is often used as a broad term in the RV community. In its simplest form, winterizing is preparing your RV for colder months but is often used to describe getting an RV ready for storage in the off-season.

So, “winterizing” can include anything and everything from emptying your RV pantry to removing your battery to post-season cleaning to protecting your RV from severe weather.

However, the most accurate definition of winterizing is preparing your RV for extreme cold, especially freezing temperatures. That is the definition we're using, as this article focuses specifically on winterizing your RV water lines so they don't freeze.

If your RV water lines freeze or liquid freezes in your tanks, they can crack or burst from the pressure. When they unfreeze, you'll be left with an instant big water damage problem or a slow leak that will gradually wreak havoc on your RV. Either way, water damage is something you want to avoid at all costs!

When Do You Need to Winterize Your RV?

Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with Compressed Air 1

If your RV will be exposed to freezing temperatures for more than a few hours, you need to winterize your water lines. You may get away with several hours of freezing temperatures since water lines can take a while to freeze through; however, it's always better to be safe than sorry.

So, if you live or are storing your RV in cold regions, winterizing is a must every autumn before freezing temperatures hit. If you live or store your RV in temperate regions, you must keep a steady eye on the weather and act immediately if freezing is in the forecast.

Do I Need to Winterize MY RV If I'm Using It in the Winter?

Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with Compressed Air 2

If you RV full-time or travel often throughout the winter, “winterizing” will look different for you. If your RV is kept at “living condition” temperatures, then you won't need to winterize. Basically, if it's warm enough for you in the RV, it should be warm enough for your RV systems.

HOWEVER, that's only a rule of thumb, and anytime your RV is exposed to below-freezing temperatures, you should take serious precautions to prevent your water lines from freezing. In those cases, you should follow these 10 Tips to Keep Your RV Pipes From Freezing While Camping .

If you camp during the winter but store it at any point in freezing weather, it needs to be winterized between camping trips. For you, the best option may be to “winterize” it by keeping it plugged into shore power (or propane power) to keep the heat on full-time at your thermostat's lowest setting.

Winterizing with Antifreeze vs Blowing Out Water Lines

There are two main methods for winterizing your RV water lines. The first is running non-toxic antifreeze throughout your water system. The second is using compressed air to blow all the water out of your water lines.

Let's start with the compressed air option and then move on to the more popular antifreeze option.

Blowing Out RV Water Lines with Compressed Air

Blowing out RV water lines is a logical solution for winterizing your RV. After all, water lines can't freeze if there isn't any water in them! You can watch the above short video by Keystone RV Company to see how it's done.

This method uses compressed air to push all the water out of your RV water systems. In most cases, RVers open all their faucets and connect an air compressor to their water line. They blast air through the system, flush toilets, etc., until no more water comes out.

Use Low PSI

Compressed air works well in many cases, but there are some important considerations. First is the potential damage an air compressor can cause. Too much air pressure can cause the same cracks and breakage you're trying to prevent in the first place.

Be sure to set the air pressure to around 30-50 psi, depending on the system you're blowing out. Otherwise, you risk damaging your system.

Please note that some owner's manuals for certain appliances or your RV as a whole state that you should not use compressed air. So, checking ALL of your owner's manuals before winterizing with compressed air is important.

Be Wary of Leftover Water

The second big concern is how effective blowing out the water is. Some appliances and water lines are coiled or don't run in straight lines. That means some water will likely settle into these troughs (like sink J traps), even after blowing them out.

This remaining water can be negligible, but it's impossible to tell how much is really left in there. You may be tempted to blast it with more air, but remember, too much air pressure can damage your plumbing system.

Many RVers still add some antifreeze to their systems after blowing it out, especially where you know the pipes bend (like sink J traps).

Those two concerns are why many RVers opt for antifreeze instead of compressed air…

Using Non-Toxic Anti-Freeze

RV antifreeze

The second and arguably more popular winterizing method is running non-toxic antifreeze through your water system. This “pink stuff” (or “Orange Stuff” for the non-toxic version) is specially designed to protect your RV water lines down to -50 degrees F and is safe to use in potable water systems.

You run undiluted antifreeze through your water system by connecting to your RV's water inlet port or wet bay. You then open faucets and run water through all of the lines until pink/orange stuff starts coming out.

The challenge is to not forget about any water lines! Methodically ensure the pink/orange stuff comes out of every water line (i.e., ice maker, washer, dishwasher,etc!) and/or drain the water from certain appliances (i.e., the ice maker!).

You can learn more about how to do this by reading this podcast transcript or watching the following video.

Like what you see in these videos?  We'd appreciate it if you would Subscribe to our YouTube Channel ( easy to do right here ) and consider “ringing the bell icon” to be notified of any new video from us. 🙂 Thanks!

Don't Forget to Drain Your Holding Tanks!

Water lines aren't the only things that can freeze! The liquids in your holding tanks can freeze in severe cold, too.

So, it's important to drain all your holding tanks, including the black water tank. Here are some helpful resources:

  • Can I Legally Dump Gray Water on the Ground While RV Camping?
  • RV Black Tank Accessories: 7 Must-Haves for Dumping & Odors
  • How to Easily Find RV Dump Stations
  • How to Dump RV Tanks at Home (Options & Answers)

Just Remember: Keep Your Water Lines From Freezing While Camping

How to Winterize an RV: The Complete Guide

We love winter camping! It's freezing cold… but so much fun! It's an entirely different experience and a great way to enjoy typical summer destinations in a whole new way.

However, RV owners must take the necessary precautions to protect their RV from the cold weather. Don't risk frozen pipes, which can cause serious damage to your RV's plumbing system!

What Method Do We Use to Winterize Our RVs?

We've used both. Last year, when our fifth wheel was kept in Tennessee during November and December, we chose to blow out the pipes with compressed air. Tennessee gets cold but not as cold as it does in northern states.

When we headed to Florida in January, all we had to do was hook up a hose, fill the freshwater tanks and hook up to city water and we were “dewinterized.”

This year, when the RV will be stored on our Michigan property, we will blow out the lines and also winterize it with antifreeze. We'll still head to Florida and a warmer climate in January, but because temperatures in Michigan can easily get below zero Fahrenheit, we feel the antifreeze will give us better protection.

We Are Huge Fans of Winter Camping!

Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with Compressed Air 3

Now we say that knowing many people are not. Indeed, you need to actually enjoy snow and cold. But we know there are thousands of RVers out there who just need a little coaxing and some tips to get out there and have fun in their RVs year-round.

So that’s why we wrote The Winter RV Camping Guide.

In this 36-page ebook – (NOT a Print book) we’ll walk you through what you need to do before you leave home to get your rig winter-ready, and we’ll cover what to do when setting up camp.

Last update on 2024-03-27 / Affiliate links / Images from Amazon Product Advertising API

travel trailer water lines

Published on 2023-10-19

Mike Wendland is a multiple Emmy-award-winning Journalist, Podcaster, YouTuber, and Blogger, who has traveled with his wife, Jennifer, all over North America in an RV, sharing adventures and reviewing RV, Camping, Outdoor, Travel and Tech Gear for the past 12 years. They are leading industry experts in RV living and have written 18 travel books.

5 Responses to “Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with Compressed Air”

travel trailer water lines

October 23, 2023at9:14 pm , Keith Fouts said:

Remember when blowing out the lines to add antifreeze to the J-traps. I like what one commenter mentioned. I might just use a wet/dry shop vac on my J-traps this winter.

travel trailer water lines

October 24, 2023at10:59 am , Team RV Lifestyle said:

Thanks for sharing, Keith! Team RV Lifestyle

travel trailer water lines

October 20, 2023at12:29 pm , Karl Tacheny said:

I live in Northern Minnesota and I always use a shop vacuum to remove the water from my RV. Don’t forget to remove the sacrificial anode from the water heater and replace it when it shows about 50 percent loss of material. Sucking out all of the water is very easy with this method, and we experience temperatures of minus 40 every winter. I have never had any problems with the water pump or tanks. Use the cheap pink stuff in your holding tanks, not the water lines!

travel trailer water lines

October 20, 2023at7:42 am , Raymond Spencer said:

I live in the Northeast where it gets below zero at times through the winter. I feel better blowing lines out and antifreeze after. None of this takes a whole lot of time and way better than having water line breaks in the spring.

October 20, 2023at5:33 pm , Team RV Lifestyle said:

Makes sense! Thanks for sharing, Raymond – Team RV Lifestyle

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Blowing Out RV Water Lines Vs Antifreeze (Pros and Cons)

If you’re an RV owner, the winter months can be daunting. It’s important to take precautions in order to protect your plumbing system from freezing temperatures and burst pipes. But how do you decide between blowing out RV water lines vs antifreeze?

Overall using compressed air to blow out an RV’s water lines is a cost-effective method of winterizing an RV and is easier to perform in addition to being easier to de-winterize. However, in extremely cold weather it is not as effective as using antifreeze to winterize.

In this article, we’ll delve into both approaches to assist you in making a well-informed decision on which is the most suitable for your recreational vehicle.

That way you can practically guarantee it runs without any issues during winter.

We’ll discuss topics such as fresh tank draining techniques, black tank maintenance tips, hot water heater bypass valve tricks – all while exploring why blowing out RV water lines vs antifreeze might be a good idea (or not.)

Table of Contents:

What is blowing out rv water lines, how to blow out rv water lines, pros and cons of blowing the lines in your rv’s water system, pros and cons of using antifreeze in your rv’s water system.

blow water line anti lg

Blowing out RV water lines is a process of removing all the water from your RV’s plumbing system.

Anytime your RV will just be parked during winter without the power on and without the taps dripping, you need to winterize it if it gets below freezing where you live.

The process involves using compressed air to force the remaining water out of the pipes and faucets, leaving them completely dry and free from potential harm.

What is the Process?

Blowing out RV water lines requires an air compressor with a minimum pressure rating of 50 PSI (pounds per square inch). Most will go much higher than 50, but staying around 50 ensures you won’t damage the water system.

Don’t worry. I’ll do a step-by-step guide in the next section.

Blowing out RV water lines can be beneficial in multiple ways. It helps protect against frozen pipes, which can lead to costly repairs due to bursting or leaking plumbing systems when exposed to cold temperatures over extended periods of time without regular use.

Additionally, it reduces buildup within piping systems that could cause clogs and affect performance negatively if left unchecked for too long between trips or uses.

Blowing out RV water lines is an essential step for winterizing your rig and ensuring that it survives the cold temperatures.

Now, let’s look at how to blow out those water lines so you can enjoy a worry-free camping season.

Turn off any water supply connected to your RV from a hose.  Then, open up faucets throughout the RV and allow them to run until the water runs out. Keep the faucets open.

You’ll need an air compressor that can reach 50 PSI, like this one on Amazon . You will also need a blowout plug like this one on Amazon which will thread onto your fresh water tank’s drain plug.

The drain plug is located on the freshwater tank outside the RV usually accessible behind one of the exterior doors.

Start by connecting one end of your hose to the blow-out plug and then connect it to your air compressor. Then turn it on starting with a low PSI.

Gradually increase the PSI until you get to about 50. Keep blowing air until there is no water visible coming from any faucet.

One tip for successful blowing out is making sure that all hoses connected between outside faucets such as an outside shower or washing machine are disconnected prior to starting the procedure.

This helps prevent overpressurization which could lead to leaks occurring down the line after refilling the tank with fresh potable drinking water post-winterizing season.

Additionally, always remember to wear protective eye gear anytime working around high pressured systems like those found within RVs since even small amounts escaping unexpectedly can cause serious injury if not taken seriously ahead of time.

Once you’ve successfully blown out your RV water lines, you can explore the alternative option of using antifreeze to protect your water system from freezing temperatures.

Discover the advantages and disadvantages of using antifreeze to protect your RV water system from freezing temperatures, as well as how to implement it, by reading further.

How To Blow Out RV Water Lines Using An Air Compressor https://t.co/5ia0n0ojgl pic.twitter.com/P7zLp4AxwJ — RV LIFE – Join the #RVLIFE Movement (@rvlife) December 4, 2021

Pros of using compressed air to blow the lines in an RV’s water system:

  • It is a fast and efficient way to remove all standing water from the system.
  • It can be done without having to disconnect any of the plumbing.
  • It is a relatively inexpensive way to protect the system during cold winter months.
  • It can be done by one person in a short amount of time.
  • It is a safe and effective way to prevent damage from freezing temperatures.
  • Un-winterizing in Spring is quick and easy as it doesn’t involve flushing the lines of antifreeze.
  • No lingering antifreeze taste in your water once you return it to normal use.

Cons of using compressed air to blow the lines in an RV’s water system:

  • The process can be noisy.
  • The air pressure needs to be monitored carefully to avoid damaging the plumbing.
  • The process requires access to an air compressor, which may not always be available or convenient.
  • If not done correctly, it can cause leaks or other damage to the plumbing system.
  • It may not be effective in removing all standing water from some areas of the system (putting your RV at risk of freeze damage).
  • Not quite as good as using antifreeze in places where temps get well below freezing.

Pros of Using Antifreeze in an RV’s Water System

  • The best and most effective way to ensure no burst pipes during cold winter months.
  • Septic-safe RV-approved antifreeze is easy to find.

Cons of Using Antifreeze in an RV’s Water System

  • Must be continually purchased as opposed to a one-time compressor expense.
  • A lot of work to de-winterize.
  • A lingering taste of antifreeze in the water once you de-winterize.
  • Dangerous to wildlife and the environment despite RV anti-freeze being labeled non-toxic .
Check out our tips for cleaning your RV water lines! #RVtips #RVing https://t.co/Tmjo8B8sco pic.twitter.com/yDeSytZ4TT — Lakeshore RV Center (@LakeshoreRV) October 25, 2016

How to Use Antifreeze in Your RV’s Water System:

First, make sure all of the water lines are empty.

This can be done by turning off the water supply and running all of the faucets until they are dry. Then, turn off the water heater and drain it completely. Once all water has drained from the faucets, turn them off again.

Next, add antifreeze, like this best-seller on Amazon , to each of the drains in your RV in addition to the toilet.

Most water pumps in an RV have an antifreeze suction tube attached to them.

It’s typically a small white plastic tube that connects to the pump on one end and is not connected to anything on the other end.

Close the valve to the fresh water tank, and open the valve for the antifreeze tube. Then place the other end of the tube into the gallon of antifreeze.

Turn on the water pump and allow it to pull the antifreeze into the plumbing system until the gallon of antifreeze is empty.

Then close the valve for the antifreeze tube and open the valve for the freshwater tank back again.

Then run the faucets inside the camper (with the pump still on) and the outside shower if you have one, and allow them to run until what comes out is totally pink (the usual color of RV antifreeze ).

CLICK HERE to see the best choice for RV non-toxic anti-freeze on Amazon.

Frequently Asked Questions

What psi should i use blowing out water lines in rv.

Blowing out water lines in an RV is essential to prevent damage from freezing temperatures.

The PSI (pounds per square inch) used for this process should be about 50 PSI. This pressure will ensure that all the water has been removed from the system, while still being gentle enough not to cause any damage.

It’s wise to be mindful that too much PSI can cause more harm than benefit.

So it is best to take the safest route when selecting a pressure level. With proper preparation and maintenance, your RV will stay safe during cold weather months.

Can I winterize my RV without antifreeze?

Yes, you can winterize your RV without antifreeze.

Empty the plumbing system of all liquid and replace it with air – this includes draining out the fresh water tank, hot water heater, and any other holding tanks/lines. This includes draining the fresh water tank, hot water heater, and any other tanks or lines that contain liquid.

Once everything is drained and filled with air, use a non-toxic RV antifreeze alternative such as propylene glycol to protect against freezing temperatures in exposed pipes.

Finally, add lubricants to all moving parts like pumps and valves for added protection during cold weather months.

Do you leave RV antifreeze in the RV’s plumbing lines?

Yes, RV antifreeze should be left in the lines to prevent any damage from freezing temperatures.

Keep it in there until the last danger of freezing temperatures has passed. Then go through the process of de-winterizing it which involves completely draining the antifreeze and flushing the lines with water to get rid of any lingering antifreeze.

Is blowing out your RV water lines cheaper than using antifreeze?

Winterizing an RV is an important part of preparing for the cold winter season.

One of the most important steps in winterizing an RV is protecting the water lines from freezing. There are two main ways to do this: blowing out the water lines or using antifreeze.

Overall, blowing out your RV’s water lines is usually cheaper than using antifreeze to winterize it.

However, there are some cases where using antifreeze may be more cost-effective, such as if you live in an area with extremely cold winters or if you plan on leaving your RV unattended for long periods of time during winter months.

Does blowing out your RV water lines prevent pipes from freezing?

Yes, blowing out your RV water lines can help prevent pipes from freezing during freezing temperatures.

This is because when you blow out the water lines, you are removing all of the water from the pipes. Without any water in the pipes, there is nothing for the cold temperatures to freeze.

It is important to note that this method will only work if ALL of the water has been removed from the pipes.

If there is still some water left in them, then it can still freeze and cause damage to your RV’s plumbing system. Therefore, it is important to make sure that you completely empty all of your RV’s water lines before attempting to blow them out.

Other steps to help avoid burst pipes

In addition to blowing out your RV’s water lines, there are other steps you can take to help prevent your pipes from freezing during cold temperatures.

One of these steps is to insulate your RV’s plumbing system with insulation wrap or foam insulation. This will help keep the temperature inside of your RV’s plumbing system higher than outside temperatures and reduce the chances of freezing.

Another step you can take is to keep a small trickle of water running through your RV’s plumbing system when temperatures drop below freezing. This will help keep the temperature inside of your plumbing system higher than outside temperatures and reduce the chances of freezing as well.

Of course that requires being connected to a water source like when you’re at a campground.

Finally, it is important to make sure that all exposed pipes are properly insulated and sealed off from cold air drafts or wind chill factors that could cause them to freeze more quickly than normal.

Taking these steps will help ensure that your RV’s plumbing system remains safe and functional during cold weather conditions.

How to winterize an RV: The complete guide!❄️ – https://t.co/y9pWMXclRx – – – #rvwinterization #rv #rvlife #roadtrip #motorhome #rvcountry #rvliving #camping #outdoors #wenrv #travel #rvlifestyle #luxuryrv #campingmemories #hiking #rvdealership #newrv #roadtrip pic.twitter.com/hyi48jZfRU — WEnRV (@WEnRVcom) October 21, 2022

Is blowing out RV water lines as effective as antifreeze in sub-zero temperatures?

Blowing out RV water lines is a popular method of winterizing recreational vehicles in sub-zero temperatures. It involves using compressed air to force all the water out of the lines, preventing them from freezing and bursting.

However, this method is not as effective as using antifreeze.

Antifreeze is designed to remain liquid even in extremely cold temperatures, so it can protect the pipes from freezing and bursting . It also helps to lubricate the valves and seals, which can help prevent leaks.

Blowing out RV water lines does have some advantages over antifreeze.

It is much less expensive than antifreeze, and it does not require any special equipment or tools. Additionally, it is much easier to do than using antifreeze, as it only requires a compressor and an air hose.

However, blowing out RV water lines is not as effective as antifreeze in sub-zero temperatures.

The compressed air may not be able to reach all of the pipes and fittings in the system, leaving some areas unprotected from freezing and bursting. Additionally, if there are any leaks or cracks in the system, they may still be vulnerable to freezing even after being blown out with compressed air.

RV antifreeze types – which is best?

The most common type of RV antifreeze is propylene glycol-based.

This type of antifreeze is non-toxic and biodegradable , making it safe for use in recreational vehicles. It also has a low freezing point, which makes it ideal for winterizing an RV. However, propylene glycol-based antifreeze can be more expensive than other types. But it is the most common choice for winterizing RVs.

Another type of antifreeze is ethylene glycol-based, and this is what you might normally see for cars.

This type is more toxic than propylene glycol-based antifreeze and should not be used in recreational vehicles. It also has a higher freezing point than propylene glycol-based antifreeze, making it better suited for colder climates.

However, ethylene glycol-based antifreeze can be more corrosive than other types and can damage some metals over time. It SHOULD NOT be used to winterize an RV.

A third type of RV antifreeze is methanol-based.

This type is toxic and hazardous to humans and animals alike. But it is popular as it has a higher boiling point than either ethylene or propylene glycol-based antifreeze.

Methanol-based antifreeze also does not corrode metals like ethylene glycol does, making it a good choice for those who want to protect their metal components from corrosion over time.

However, methanol-based antifreeze can be more expensive than other types and may require special handling when disposing of them due to their toxicity levels.

Because you will be eventually drinking water from faucets that once contained the antifreeze, DO NOT use Methanol-based antifreeze.

CLICK HERE to see the best choice for RV anti-freeze on Amazon.

An RV hits the road out of Mammoth Hot Springs; 1977 #Yellowstone #RV #Summer #NationalParks pic.twitter.com/osJIy6aWj6 — Vintage Yellowstone (@VintageYNP) May 4, 2018

How do you de-winterize an RV?

De-winterizing an RV is an important step in preparing for the camping season once the last danger of freeze has passed. It involves a few simple steps to ensure that your RV is ready for the road.

The first step is to drain the freshwater tank.

With the power to the RV on, turn on the water pump and open all the faucets and shower. The antifreeze (pink stuff typically) will begin to flow. All it to flow until it stops flowing.

Next, you will need to flush out all of the plumbing lines. This can be done by connecting a garden hose to the RV as you normally do at a campground and turn it on. With the faucets still open, run fresh water until all of the antifreeze has been flushed out.

Make sure to run plenty of water through each line until it runs clear.

Do monitor the levels in your black and gray tanks to ensure you don’t accidentally overfill them! If you are at a campground, simply ensure your gray/black water tank hose is connected to the campground’s sewer drain and open the gate valves as you would normally at a campground.

De-winterizing an RV is an important step in preparing for the camping season, as it ensures that your RV’s plumbing system is protected from freezing temperatures during winter months.

But that’s just a quick snapshot and not the focus of this article!

Check out my complete step-by-step guide and checklist on de-winterization . I show you everything you need to do to get your RV ready be back in action.

Just click that link to read it on my site.

What do you do with the water filter when winterizing an RV?

Winterizing an RV is an important part of preparing for the cold winter months. One of the steps in this process is to take care of the water filter.

The first step is to remove the filter from its housing.

This can be done by unscrewing the housing and carefully removing the filter. It’s important to be careful when doing this, as some filters can be fragile and easily damaged.

The water filter is typically located very close to where you connect the water supply from a campground to your RV. Typically on the outside of the RV behind one of the hatch doors.

Once the filter has been removed, it should be inspected for any signs of damage or wear and tear. If any damage is found, it should be replaced with a new one before continuing with winterizing.

The next step is to clean the filter thoroughly. This can be done by running a solution of vinegar and water through it, or by using a specialized cleaning solution designed for water filters. Once cleaned, it should be rinsed thoroughly with clean water before being stored away for winterization.

Finally, the filter should be stored in a cool, dry place until it’s ready to be used again in springtime. This will help ensure that it remains in good condition throughout the winter months and will help keep your RV’s water system running smoothly when you’re ready to use it again in springtime.

How much antifreeze do you need to winterize an RV?

For a standard RV, you will need between 2 and 4 gallons of antifreeze.

If your RV is larger than average, you may need up to 6 gallons. It is important to use a non-toxic, propylene glycol-based antifreeze that is safe for drinking water systems.

Ultimately, comprehending the dissimilarities between blowing out your RV’s water lines and utilizing antifreeze is paramount for correctly winterizing your rig, if it even gets cold enough to warrant winterizing your RV .

Blowing out the water lines is an ideal approach to guarantee no liquid remains in the system or holding tanks, but if that isn’t possible, then antifreeze can be a suitable substitute.

However, make sure that you follow all of the instructions outlined in your owner’s manual when doing either one of these tasks as improper use could lead to costly repairs down the road.

No matter which method you choose for winterizing your RV ‘s plumbing system, just remember that blowing out rv water lines vs antifreeze can both be used effectively depending on what works best for you.

Colorado Winter RV Park by vicki watkins is licensed under CC2.0 and was cropped, edited, and had a text and graphic overlay added.

Image by OpenClipart-Vectors from Pixabay and Image by Clker-Free-Vector-Images from Pixabay

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Jeff Campbell

Jeff Campbell travels on and off with his 3 daughters in a Newmar Baystar Class A Motorhome. He writes extensively on both RVs, campgrounds, parenting on the road tips, remote learning & schooling, and much more! Click Here to learn more about me. Click Here to learn more about my site. Editorial Policies.

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What Size Is RV Water Lines? (RV Black and Gray Pipe Sizes)

  • December 10, 2022 /
  • By James V.

Your size may be different. The older the RV the chances are your water lines are not the same size nor made of the same material as modern RVs. You could have old plastic pipes with metal fittings and they made be larger than the new PEX pipe material.

The standard for modern RVs has changed to using 1/2-inch PEX pipes. There may be other sizes included like 7/16ths or 5/8ths inch pipe so measure your pipes to be sure. You may have more than one size in your RV.

To learn more about this topic, just continue to read our article. It has the information you want to know about so you can make repairs to your water system easily. Take a few minutes to see how this information helps you solve a plumbing problem

What Kind Of Water Pipe is Used in RVs ?

What-Kind-Of-Water-Pipe-is-Used-in-RVs

The industry has moved on from plastic and metal. It has now turned to what is called Pex pipe material to run your water lines. If you have not heard of Pex pipe material then that short word stands for cross-linked polyethylene.

This pipe material is lightweight, flexible, easy to work with, and can handle a lot of water pressure. Plus, Pex is a form of plastic and does not corrode. All of this adds up to the RV makers installing a long-lasting water line in your RV.

By long-lasting, this material has been tested and it is said to be able to last for 100 years+. This is in sharp contrast to metal pipes that can corrode and break down long before that century has passed.

While this pipe material is flexible and capable of expanding to 3 times its normal size, it can break and crack on you. Extreme temperatures, over-tightening, and damage through normal use are just three sources that can cause this pipe material to crack or break.

Two places you do not want this pipe material are near a heat source or out in the sun. The former can melt the plastic and the latter can cause it to break down through exposure to UV rays.

What Size is The RV Water Line?

What-Size-is-The-RV-Water-Line

This will depend on your model of RV or trailer. RV makers have been known to use different sizes of water pipes in different models. This should hold true for the older than 2000 models. Those older RVs may have a water pipe size all their own.

However, in modern RVs and trailers, you should find that the standard diameter is 1/2 or 3/8 of an inch. Those diameters should be all the sizes you would need.

But there may be those RV models that come with a 3/4 inch diameter on their water pipes. We have seen this size sold by at least one RV parts store. The best thing to do when you need to change your water lines is to measure the old diameter first to make sure you know what size you do have.

Many older RV and trailer models may come with the 3/8 of an inch diameter in its old pipe material but again, you have to disconnect one pipe and measure the opening. That way you will know for sure.

The Pex pipe material, despite its weaknesses, is being used now as it lasts longer and is easier to work with. Plus, the flared connections help speed up construction time.

Plumbing Size On An RV Water Drain Pipe

Plumbing-Size-On-An-RV-Water-Drain-Pipe

Again, the size of your specific RV drain may vary depending on age, brand, model, and other factors. But so far, all we have seen is that the drains are either 1 1/2 inches in diameter or 3 inches in diameter.

There may be odd sizes but that will depend on who built and designed your RV or trailer. Older RVs may have the old standard of drain size. That was 4 inches for some holding tanks.

This change created a problem as newer hoses were made in the 3-inch size. You would need an adapter to drain your 4-inch holding tanks without making a mess.

If you are talking about the water drain plug, then you have either a 1/2-inch or a 3/4-inch plug. Not every part is going to be the same size. If you are not sure about your RV, you can ask your dealer.

They should have a good idea of the water drain pipe size. Since the water drain is not going to be passing large objects, do not be surprised if it is a bit on the small size.

RV Gray Water Pipe Size

RV-Gray-Water-Pipe-Size

This part is going to be about the same as every other drain you have in your RV or trailer. Since this drain does not have to deal with a large amount of waste products you won’t find a large drain size on it.

The standard for today seems to be 3 and 1 1/2 -inches in size. That is according to the parts outlet we found online. They were not selling any other sizes for you to use in your RV.

This may cause a problem for those owners of older RVs that came with the standard 4-inch drains. You would have to buy an adapter to use to make sure you can connect those new universal RV hoses.

The real problem comes in when one of your larger gray water tank drains breaks or cracks. You may be hard-pressed to find a replacement for it. At least at those stores that cater to RV owners and their special needs.

Most modern RVs should come with a 3” size of drain pipe but that may be only for the external drain and not for the lines that drain into the gray water tank. The interior drainpipe may be a bit smaller.

The best thing to do is crawl under your RV and measure those drain pipes. Because different models come with different designs, it is hard to give a specific answer.

RV Black Water Pipe Size

RV-Black-Water-Pipe-Size

This is probably the easiest water drain pipe question you can ask and answer. There is only one pipe that goes into the black water tank and that comes from the toilet. That drainpipe has to be a specific size to make sure all the waste gets through the pipe and into the tank.

The interior and exterior drains on this system are now 3 inches in diameter. You won’t find any smaller sizes as that would be too small for draining. Again, this does present a problem for those RV owners who have older models that were built by older standards.

If your drain is 4 inches in diameter, you would need an adapter to connect to the sewer hoses. Of course, if you have an older RV you may not find that RV parts outlets are stocked with 4-inch replacement drains. You may have to shop elsewhere to get the size you need.

Make sure to measure your drains and then check with different RV parts stores and see what they have in stock. You can do it all by computer and stay in the comfort of your home or trailer.

With everything changing these days getting parts for older RVs is becoming more of a challenge.

What Size Pipe Connection On The RV Water Heater

What-Size-Pipe-Connection-On-The-RV-Water-Heater

This will go by the brand of your RV’s water heater. Different companies make these drains in different sizes. That mentality should hold true for the connections as well.

For example, a Dometic water heater may only have a 1/2 inch connection diameter., while Camco seems to have a 3/4 inch connection diameter. Valterra may have a 3/8 of an inch connection and on it goes.

You will find that the drain plugs on the different brands of water heaters are a different size. Suburban placed a 7/8ths or a 15/16ths of an inch drain plug on its water heaters (depending on the model).

Atwood, when they were in business, used the same size as Suburban but Dometic went with a 1/2-inch. Then the RV makers may use all 3 sizes depending on the model of RV or trailer they are building.

Getting the right size of water pipe and connections, as well as plugs can be a bit of a guessing game. Make sure to measure your RV’s water lines and connections as you never know what size those RV makers will use.

Some Final Words

Getting the right-sized water pipe may not be as easy for owners of older RVs as it is for newer ones. With the standards changing the older owners may be out of luck.

To make it easier for you to change broken water lines or connections, make sure to measure your current parts and buy the same size. If you do not like Pex pipes then go back to the old copper or PVC options. They are just not as flexible.

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RecPro 1/2" RV Pressurized Cold Water Line | Flexible | Non-Toxic | Vinyl | Heavy Duty | Length Options (5 Feet)

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RecPro 1/2" RV Pressurized Cold Water Line | Flexible | Non-Toxic | Vinyl | Heavy Duty | Length Options (5 Feet)

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What to Do If RV Water Lines Freeze: A Comprehensive Guide

Picture this: you’re enjoying a winter adventure in your RV, relishing the beauty of snow-capped mountains and crisp air.

Suddenly, you discover that your RV’s water lines have frozen, leaving you without a water supply.

Don’t panic!

In this article, we will guide you through the steps to take if you encounter frozen water lines in your recreational vehicle.

By following our expert advice, you’ll be well-equipped to tackle this icy predicament head-on and ensure your water system gets flowing again.

What to Do If RV Water Lines Freeze?

When faced with frozen water lines in your RV, it’s essential to take immediate action.

Follow these steps to address the issue and get your water flowing once more:

1. Turn Off the Water Supply

As soon as you discover frozen water lines, it’s crucial to turn off the water supply to prevent further damage.

Locate the main shut-off valve in your RV and close it to halt the water flow.

This step is essential to minimize any potential leaks or bursts in the pipes.

2. Open Faucets and Drains

Once the water supply is turned off, open all the faucets and drains in your RV to relieve any pressure in the system.

This will help prevent additional stress on the frozen pipes and potentially reduce the risk of cracks or leaks.

3. Thaw the Water Lines

To thaw the frozen water lines, you have several effective options at your disposal:

a) Apply Heat to the Affected Areas

One of the most common methods for thawing RV water lines is by applying heat.

Here’s what you can do:

  • Use a hairdryer: Gently warm the frozen areas with a hairdryer on low heat. Keep the dryer at a safe distance to avoid any heat damage.
  • Wrap with towels soaked in warm water: Dampen towels with warm water and wrap them around the frozen sections. This can help expedite the thawing process.
  • Install heat tape: Heat tape is an electrical device designed to warm pipes. Carefully follow the manufacturer’s instructions when installing it on the frozen sections of your water lines.

b) Utilize RV Antifreeze

RV antifreeze, available at most camping supply stores, can be a useful tool for thawing frozen water lines.

Follow the instructions on the antifreeze container and introduce it into your RV’s water system.

As the antifreeze circulates, it will gradually thaw the frozen areas.

c) Use Warm Water

Another simple yet effective method involves using warm water to thaw the frozen lines.

Fill a container with warm water and carefully pour it over the affected areas.

The gentle heat transfer can assist in melting the ice within the pipes.

4. Inspect for Leaks or Damage

After successfully thawing the frozen water lines, it’s crucial to inspect the system for any leaks or damage.

Slowly turn on the water supply and observe each connection point, faucet, and pipe for signs of leaks.

If you spot any issues, promptly address them to prevent further complications.

5. Insulate and Protect

To prevent future occurrences of frozen water lines in your RV, take proactive measures to insulate and protect your water system.

Here are some recommended steps:

a) Add Insulation

Inspect your RV’s water lines and ensure they are adequately insulated.

If you discover areas lacking insulation, consider adding foam pipe insulation sleeves or heat tape.

These measures can help keep the pipes warm and prevent freezing.

b) Heat Source Placement

During winter trips, position a heat source near the vulnerable sections of your RV’s water lines.

This could be a space heater or a specialized RV pipe heating device.

Exercise caution and ensure proper ventilation when using any heat source.

c) Disconnect and Drain

If you plan to store your RV in extremely cold conditions, it’s wise to disconnect and drain the water lines completely.

This will eliminate the risk of freezing and potential damage during prolonged periods of inactivity.

Frequently Asked Questions (FAQs)

Can i use a heat gun to thaw frozen rv water lines.

While a heat gun may seem like a viable option, it’s important to exercise caution. Heat guns produce intense heat, which can damage or melt certain materials in your RV. Stick to safer alternatives like hairdryers or warm water.

Is it possible for RV water lines to freeze while connected to a city water source?

Yes, it is possible. If the city water source does not provide heated water or the water hose is exposed to freezing temperatures, the RV water lines can still freeze.

Should I leave my RV’s faucets dripping overnight to prevent freezing?

Dripping faucets can be a preventive measure to avoid frozen water lines. Allowing a small amount of water to flow through the pipes helps prevent ice formation. However, this technique is not foolproof and may not work in extremely cold conditions.

How can I protect my RV’s water filter from freezing?

To protect your RV’s water filter from freezing, consider relocating it to an insulated area within your RV. Alternatively, you can use a specialized heated water hose that keeps the water flowing to the filter, preventing freezing.

Are there any DIY methods for creating insulation for RV water lines?

Yes, there are a few DIY methods you can try. Wrapping the pipes with old towels or using foam pool noodles slit lengthwise are simple options to provide temporary insulation. However, it’s recommended to invest in proper insulation materials for long-term protection.

Can frozen RV water lines cause permanent damage?

Frozen RV water lines can lead to burst pipes and subsequent water damage. The severity of the damage depends on various factors, including the duration of freezing and the quality of the pipes. Promptly addressing frozen water lines can help minimize the risk of permanent damage.

Conclusion: Be Prepared and Take Action

Experiencing frozen water lines in your RV can be an inconvenience, but armed with the right knowledge, you can tackle the situation effectively.

Remember to act promptly by turning off the water supply, thawing the lines safely, and inspecting for any leaks or damage.

Implementing preventive measures, such as insulation and heat sources, will also help protect your RV’s water system from freezing in the future.

By being prepared and taking swift action, you’ll ensure a continuous water supply during your RV adventures, even in the coldest of winters.

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How to Remove RV Water Line Clamps

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When it comes to rv water line clamps, the right way to remove them can make all the difference between being stuck in the middle of nowhere with no water or having to buy entirely new fittings. However, they are simple enough that if you know how to do it correctly, you can do it in just minutes! This article will show you how to remove rv water line clamps safely and efficiently so that you never get stuck on the road again!

Table of Contents

If you have an RV, then you know that there are a lot of different parts and pieces that go into making it work. One of those parts is the water line clamps. These clamps help to keep the water lines in place so that they don’t come loose and cause problems. Before begin, ensure that you have the right tools for the job. You will need a Phillips head screwdriver and a flathead screwdriver. These are some of the common sizes for clamps: 1/4 inch or 5/16 inch clamp. If you do not know what size your clamp is, then it is best to measure it before beginning so that you can buy the appropriate sized wrench.

Identify the right clamp

The first step is to identify which clamp you need to remove. There are two types of clamps: hose clamps and pipe clamps. Hose clamps are generally used to secure hoses, while pipe clamps are used for pipes. If you’re not sure which type of clamp you have, consult your owner’s manual or ask a professional.

Removing the Clamp

First, locate the clamps that are holding the water line in place. There are usually two of them, one on each side of the line. Next, unscrew the screws holding the clamps in place. Be careful not to strip them. Once the screws are removed, you should be able to slide the clamps off easily. If they’re stuck, you can try spraying them with WD-40 or using a rubber mallet to tap them loose. Finally, clean up debris that may have been left behind and dispose of it properly.

Repairing Holes in Plastic Pipes

RV water line clamps are used to secure the water lines running to and from your RV. Over time, these clamps can become worn or damaged, causing leaks. If you notice a leak, it’s important to repair it as soon as possible.

If you’re new to the world of RVs, you may not know how to remove RV water line clamps. These clamps are used to secure water lines and prevent leaks. They can be made of plastic or metal and are usually located near the water pump or water heater . While they may seem like a simple task, removing them without damaging your RV can be tricky.

How to Remove RV Water Line Clamps

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  1. How To Fix RV Water Supply Lines: RV Plumbing Tips

    Simply, cut the tubing squarely and ensure there aren't any burrs on the tube. Unscrew the nut from the fitting, and slide it back over the tubing. Now, push the tubing over the fitting flare, rocking it back and forth until it comes to a full stop against the fitting. Then, tighten the nut by hand until secure.

  2. RV Plumbing, Water Line Fittings and Repair

    An RV water heater will typically have a 6-gallon or 10-gallon tank which is plumbed in as part of your RV plumbing system. Cold water enters the tank at the bottom through tubing from the fresh water tank. This cold water then fills the tank, which in turn pressurizes the hot water system in your RV. Once the water heater tank is full, the ...

  3. RV Water Lines: How to Find, Repair, and Seal Leaks

    The water lines in an RV can look like a jumbled mess of various connections as water needs to run to water pumps, heaters, and the multiple faucets, toilets, and showers in an RV. The water lines in an RV can look like a jumbled mess, but each one serves an important function.

  4. RV Water Lines, Tubing and Seals

    View Details. RV Sea Tech Red 1/2" CTS x 100' Coil Tubing. For Sale. $75.40. View Details. RV Sea Tech Red 3/4" x 50' CTS Tubing. $85.12. You need a good water hose to keep your water flowing smoothly.

  5. RV Plumbing System Basics: Diagrams & How It All Works

    RV Plumbing System Basics. Your RV plumbing system is made up of many of the same components as a house plumbing system, with a major difference: you store your fresh AND waste water on board. Every self-contained RV will have at least 3 water holding tanks, and the size of the tanks is dependent on the size of the RV.

  6. How Your RV Water System Works: A Complete Newbie's Guide

    Use 1/4 cup of bleach for every 16 gallons your fresh water tank holds. So, if you have a 40-gallon water tank, you'll need 5/8 cup of bleach. Dilute it with around a gallon of water (never pour straight bleach directly into your tank), then pour the mixture in. Fill your tank completely. Make sure to use potable water.

  7. RV Water System Explained In Depth

    The RV Water System is pretty easy to understand, once you know what goes where and why. This is an in-depth overview. Hooking Up RV Water or Filling the Ta...

  8. How To Replace Travel Trailer Water Lines

    Belle's water lines get a major upgrade. 1/2 inch pex tube EVERYWHERE. And me trying to clamp things together. Guest starring my father Eddie and Uncle Glen ...

  9. How To Blow Out RV Water Lines With An Air Compressor

    Attach a plastic blowout plug to the city water inlet. Connect an air compressor at optimal 30-40 PSI setting. Open valves one at a time to force air through each line. Disconnect compressor and bypass hot water heater. Add antifreeze after draining to displace leftover moisture.

  10. How Do RV Water Systems Work?

    RV water systems distribute water in three main ways: by a demand pressure system, a city water pressure system, or a manual pump system. A demand pressure system utilizes a water pump powered by a small 12-volt motor. Most RV water pumps pressure to a range of 40-50 PSI. An internal pressure switch turns the pump off when the set pressure is reached.

  11. Learn About Different RV Water Lines

    Older style RV water lines used to be a hard plastic with a lot of metal elbows and crimp ends. These lines were very susceptible to freezing and would have leaks caused by vibrations from driving on the highway. Newer generations are starting to use plastic pipes with a more user-friendly style featuring flared fittings. Many of these new RV ...

  12. How to Clean Your RV's Water Lines

    Turn off the faucets and water pump. Water will remain in the lines and tank. Let your RV sit overnight with the water lines filled with the bleach-water solution in the lines. For best results, it's recommended to let the system sit for 12-15 hours. Flush fresh water tank with clean water.

  13. How to Access Water Lines in RV: 6 Steps [DIY]

    Step #2: Consult the RV Owner's Manual To Identify Access Points. Check your RV's owner's manual to find the water lines. It provides essential information on where the water lines are located and how to access them. Water lines in RVs are usually hidden behind underneath the vehicle, drawers, or inside compartments.

  14. How to Keep RV Water Lines from Freezing

    Increasing your RV's insulation is another effective way to keep its water lines from freezing in cold weather. Make sure that all of the walls and windows are properly insulated, as this will help to keep the interior of your RV warm and prevent any of its pipes from becoming frozen during winter months. 5. Install Heat Tape on Pipes.

  15. How to Remove Air From RV Water Lines Quickly and Easily

    Turn OFF your RV's water heater. Wait an hour or so to allow the water in the tank to cool down. Shut off the main water supply. Open a faucet inside your RV to relieve the pressure in the system. Flip the pressure relief valve on your water heater and allow any water to be released. Close the pressure relief valve.

  16. How To Unclog RV Water Lines ? [5 Simple Steps]

    Step 3: Cleaning the Holding Tank. After you've drained all the freshwater lines, open the drinking water hold tank. You should drain all of the water from the tank and then empty it. If there's a bit of remaining water, run the pump. This will force out all the residual water.

  17. Winterizing Your RV: Antifreeze vs Blowing Out Water Lines with

    There are two main methods for winterizing your RV water lines. The first is running non-toxic antifreeze throughout your water system. The second is using compressed air to blow all the water out of your water lines. Let's start with the compressed air option and then move on to the more popular antifreeze option.

  18. Blowing Out RV Water Lines Vs Antifreeze (Pros and Cons)

    Blowing out RV water lines does have some advantages over antifreeze. It is much less expensive than antifreeze, and it does not require any special equipment or tools. Additionally, it is much easier to do than using antifreeze, as it only requires a compressor and an air hose. However, blowing out RV water lines is not as effective as ...

  19. What Size Is RV Water Lines? (RV Black and Gray Pipe Sizes)

    The older the RV the chances are your water lines are not the same size nor made of the same material as modern RVs. You could have old plastic pipes with metal fittings and they made be larger than the new PEX pipe material. The standard for modern RVs has changed to using 1/2-inch PEX pipes. There may be other sizes included like 7/16ths or 5 ...

  20. RV water lines

    Thousands of rv water lines reviews, same day shipping. Best rv water lines selection available. Easy online ordering or call Hwy A at 1-800-940-8924.

  21. RecPro 1/2" RV Pressurized Cold Water Line

    RV Cold Water Line . The non-toxic PVC tubing is reinforced with nylon braiding to hold up to the pressures of every day RV'ing and keep your water safe to drink at the same time. It is flexible enough to get through some tight places without binding and transport water to your faucet or shower with ease. The ½" inside diameter grants safe ...

  22. What to Do If RV Water Lines Freeze: A Comprehensive Guide

    1. Turn Off the Water Supply. As soon as you discover frozen water lines, it's crucial to turn off the water supply to prevent further damage. Locate the main shut-off valve in your RV and close it to halt the water flow. This step is essential to minimize any potential leaks or bursts in the pipes. 2.

  23. How to Remove RV Water Line Clamps

    First, locate the clamps that are holding the water line in place. There are usually two of them, one on each side of the line. Next, unscrew the screws holding the clamps in place. Be careful not to strip them. Once the screws are removed, you should be able to slide the clamps off easily. If they're stuck, you can try spraying them with WD ...

  24. Coast Guard says finding survivors unlikely after Francis Scott Key

    The water temperature in the Patapsco River at the site of the Key Bridge collapse this morning is currently around 47 degrees Fahrenheit, according to buoy data from the National Oceanic and ...