Pressure And More Pressure On Your RV's Water Lines

Are you putting to much water pressure on your RV's PEX water lines and their PEX fittings?  Do you know how much pressure you can put on your RV's water lines and their  PEX fittings?
Let's take a look and see what's what.








RV manufacturers typically use PEX  PlasticTubing for all RV plumbing runs. The two sizes are commonly used, 3/8-inch and 1/2-inch. These are the standard size because the outside diameter of the tubing is about 1/8-inch greater than the called-for size. Red PEX is usually the Hot water line and Blue or Clear the cold water line.  But, not always.  There are special fittings used with this type of water line called PEX fittings.  Below are some examples of some fittings you might see under one of your sinks.

The fittings can be of any color or even colorless but they will all have the ribs you see on the fittings above.  You will also note that each PEX fitting has a crimped ring around it.  The ring looks like below.

To put the ring on the PEX tubing and secure the ring you would need a crimping tool.  Shown below.

OK, now that you understand what you currently have let's discuss the problems this type of system brings the RVer.  The whole system can leak at any time and usually does. Every connection, if it is not put on correctly, will leak at the worse possible time. Ah, you say no problem I will just squeeze the ring with my trusty pliers.  Well, your trusty pliers will not be able to squeeze the connector hard enough to seal the leak in most cases.  What to do?  Change the fitting to a more updated connector.  We will cover that in just a minute.

Why do these cheap PEX products not work well all the time?  PRESSURE, water pressure from campgrounds varies greatly and can not.  The PEX water system in an RV cannot safely go above 65 pounds of water pressure.  I will not allow mine to go over 55 pounds of pressure.  

How do I control the RV Parks water pressure with a brass water pressure regulator? 

Brass RV Water Regulator

 You can adjust this type of regulator to any safe water pressure you like for your RV.  This type of regulator does not affect the flow of the water just the pressure. There are lesser expensive water pressure regulators like the one shown below.

Fixed Water Pressure Regulator

While this type will regulate the water pressure it also affects the flow of the water which some people find objectable.  Either one will protect your RV water system from to much PRESSURE.

OK, you just found a PEX fitting under the kitchen island that is leaking now what can you do to fix the problem and how much time is it going to cost you?

You should carry a few Shark Bite connectors like the ones shown below.

Shark Bite Coupler

Shark Bite T

Shark Bite to Threaded 

There are even more fittings to choose from but you get the idea.  The advantages of these types of connector are, 

• INSTALLS IN SECONDS: 1/2 inch straight coupling requires no special tools, no soldering, no crimping or glue. Just push to create a watertight seal

• COPPER, PEX, CPVC: SharkBite straight coupling plumbing fittings fits copper tubing, and CTS CPVC and PEX and connects all three types in any combination

• CERTIFIED: SharkBite fittings are certified to 200 PSI and 200°F and can be reused up to four times

Now doesn't that beat the PEX connector and all the fuss it would take to fix a leaky connection?

The real story here is to control your water pressure coming into your RV.  If you do not you will find leaks and under the shower or under sink water damage.  

One other thing you may want to add a water shutoff to your toilet so in case you need to work on it you do not have to shut off all the water to the RV.

Shark Bite Shut Off

Until Next Time

And finally, please remember that this blog is an Amazon affiliate. When you order something through any of the Amazon links, it doesn’t add anything to your cost, but I do earn a small commission on everything you buy. 

Just click on an Amazon link, then shop as usual.

Well, What Did You Forget This Time?

Whether you are a new Full Timer, a Newbie, a Part Timer, or a Weekender we all seem to forget something vital to our RVing enjoyment or safety at the beginning of each season.  What do you really need to have to hook up your RV and have a safe but fun RVing experience? To find out I asked a bunch of Facebook RVers to give me a list of their most important, not to be forgotten, "must haves" for the RV before you pull out.  Here is the list in no particular order.









1. Power Cord to hook up the RV along with an extension cord. You need enough to go to either end of your RV.

15 Ft 50 Amp Extension Cable

25-Ft 30 Amp Extension Cord

2.  An extension drinking water hose is a must.  You should have a 25-foot regular hose and a 25-foot extension.

25 Foot Drinking Water Hose

I make the assumption  that you already have a drinking hose with you.  If not, you are going to need one.  Get a 25 foot one for everyday use and another 25 foot as the extension. (I once stayed at a park where the water was on one side of the TT and the electric was on the other side of the TT.)

3. Another good thing to have is a Water Hose Splitter for the park supply line. That way if you  need some additional outside water you will not need to unhook the water supply to the rig.

Plastic Water Hose Splitter

4. Extra sewer hose is a must these days.  With longer rigs you can't leave home without it.

10 Foot Sewer Hose Extension

5. In addition, to the hose extension you should also have a short clear section of sewer pipe to keep an eye on what is coming out of the sewer and to know when it is done draining.

45 Degree Clear Fitting

With the above fitting you can really see if that new RV TP really is quick dissolving.

6. In some States and in some RV Parks you must raise the sewer line off the ground.  It is the law.  There are lots of idea floating around but here is one of the simplest.  Remember in some States this is required.

Sewer Hose Stand

7. If the park you are staying at has Cable TV you will need some TV cable to go from the Utility Box to the rig.

25 Ft RG6 Cable TV Wire

8. How about better tasting water?  Please read the Blog Post on "Water Out Of The Campground Faucet, YUCK!!" for all the best options but, here is just one.

RV Water Filter

9. A good tire pressure gauge is vital for any RVer.  A cheap one is not an option.  As always check your RV tires when Cold.

Good Digital Tire Gauge

10. Wheel Chocks are the next must have item.  Oh, the Horror Stories I could tell.  Get some Chocks.

RV Wheel Chocks for Pull Behind RVs.

11.  For reasons of safety and anti-theft I also recommend an X-Chock.

Locking Chock

12. A spare set of water hose washers is a good idea.

Water Hose Washers

13. And by all means an RV 30 or 50 amp (depending on your RV's power requirement) Power Management Protector (Surge Protector).

30 Amp Surge Protector

50 Amp Surge Protector

Just be sure to get one that works with your Rig.

14. A Water Pressure Flow Manager would be a good thing as well.  This limits the water pressure to your Rig to no more than 50 psi of water pressure in your RV's plastic water pipe system.  Much more than that and you might start to blow water fittings.

Water Pressure Regulator

Water Pressure Regulator With Meter

14.5 If you use a Water Hose Splitter, like number 3 above for cleaning out your RV sewer hose then you should have a water Back Flow Preventer like

Water Back Flow Preventer

This little unit attaches to the hose splitter and prevents and water hose connected to the open side of the hose splitter from leaking water back into the water source and contaminating it.  Like when you wash out the sewer hose or the spare hose falls into a puddle. 

15. Often times people will suggest that you take boards with you to level the Rig in a campsite that is not level.  While boards may work they add weight and can absorb water when left on the ground during rain.  Here is an alternative.

RV Ramp/Leveler

Ramp Leveler Video

16. You will not want to forget some RV Dog Bones.  These adapters change your electrical hookups from one type to another.  For example from 50amp to 30amp.  Why because the campground only has 30amps. Please read "RV Dog Bones What Are They and How Are They Used" further down in this Blog for more details.

Adapt 50amp Plug to 30amp Plug

17. You should also carry a water hose for everything but drinking.  Wash the kids feet, flush the sewer hose, etc.  You get the picture.

General Duty Water Hose

18. You should also have a spray bottle of disinfectant to use on park water taps.

Spray Disinfectant

Feel free to add your Can't Be Left Behind" items to the comments area.

Until next time.

The Open Range RV Owners is a Facebook Group on RVing with Hints & Tips. In case U can't find us "Facebook.com/groups/Open Range RV Owners" we are here hoping you will join us!

And finally, please remember that this blog is an Amazon affiliate. When you order something through any of the Amazon links, it doesn’t add anything to your cost, but I do earn a small commission on everything you buy. Just click on an Amazon link, then shop as usual.