RV Water Pressure Regulator

If you’re like me and you cruise the Facebook RV groups and Internet discussion boards, you’ll hear a lot about this little doohickey, the famous WATER PRESSURE REGULATOR! Here’s a picture of my setup:

Notice I don't just have a regulator, I also have a flex hose and quick connector on mine.

How many times have you gotten to a campground late and just want to get hooked up and go relax? But then that darn water connection starts leaking, after you fumbled with it for ten minutes to get it hooked up!

Well not anymore! With a simple quick connector and flex hose, all you have to do is feed you fresh water hose through the opening and snap it on! NO MORE LEAKS OR ADJUSTMENTS!

There's a lot more to the story, so keep reading!

So, I’m guessing that, if you have spent any time on the Internet reading about the hook ups on an RV, you’ve heard all the so-called “experts” talking about how you absolutely need to have a water filter!! With an extra exclamation point!! Listen folks, I’m no expert on anything, but I will give you a little common sense advise: don’t listen to all this chatter! If the filter were necessary, it would have come with your unit from the factory! Look, we’re hooking up to city water most of the time, right? Hey, guess what? we’re already getting filtered/treated water! But here’s the kicker! Take a look under your kitchen sink… Aha! See that blue thing attached to your PEX pipes? That’s a water filter! The only filter necessary on your RV is at the drinking water, or kitchen sink! So if you didn’t know already, there’s one more thing you need to do every year, change the kitchen water filter!

Now, with that out of the way, let’s move on!

Let’s talk about the water regulator for a moment. The question is, do you actually need one? The answer is a definitive NO! The PEX pipes in your RV are pressure, c-de rated, at 120 degrees and 125psi from the manufacturer, but your RV manufacturer will tell you 80psi maximum, and recommend 40-50psi for extended operating usage. So for argument’s sake and to avoid warranty issues, we’ll use the 40-50psi number! Trust me when I tell you, you will never find an RV park with 80psi water pressure! In fact, quite the opposite is true, and you’re lucky to find one with even 50psi! Most residential hook ups will be around 60psi or so.

Moving on! Facebook groups and Internet discussion boards will absolutely tell you the opposite! They will call me the devil, and tell you the story about their friend who “got their pipes blown out” by an RV park’s water pressure…  Stories abound on the Internet, and they’ll always be that one guy in every group that tells you the sky will fall if you don’t take his advise!

So let’s get to the point already! Many people will recommend what is advertised as, and reported to be a pressure regulator. Guess what? These ads are misleading at best! Here is an example of a search on Amazon, notice how all three are advertised as “regulators”:

The two on the left ARE NOT pressure REGULATORS. They are simple REDUCTION FITTINGS. I bought BOTH and tested them at my friend’s warehouse where I store my RV. He has 85psi on his water supply. I attached my regulator shown on the right to each of the other two and set it at 75psi. The one on the extreme left produced 72psi, and the other one had 70psi. BOTH are advertised to regulate the pressure to 40-50psi; neither one did. On closer inspection, BOTH are simple reduction fittings, nothing more.

So why am I telling you all this? 🙂 The problem occurs when you get to a park with LOW water pressure! And there are a whole lot of them out there! Pull up to a park with 35psi and try and take a shower! The two fittings on the left will reduce the pressure even further! Causing the opposite of the intended purpose! The one on the right IS an actual regulator that you can set, and the one I recommend. I have mine set to 55psi. It will regulate high pressure, should I ever run into that situation, but more important, it will not restrict low pressure… Whew!

So, after a very long story, if you’re interested in the way I set mine up, here’s your shopping list with Amazon links:

  1. Valterra A01-1117VP Brass Lead-Free Adjustable Water Regulator – $54.95 – Prime
  2. Green Thumb FX1GT Kink Protector and Faucet Extension – $7.89 – Prime
  3. A8011 Deluxe Pressure Washer Garden Hose Brass Quick Connect Kit 2 Sets – $7.50 – Prime
  4. 3/4″ Width – PTFE Industrial Sealant Tape,-450 to 550 Degree F Performance – $3.99 – Prime(Amazon links are affiliate links that help pay for this website. They will NOT cost you a penny more!)

Simply attach the regulator to the coach city water inlet. Next attach the kink protector to the regulator. Then the quick disconnect male fitting to the hose protector. And finally, the female quick disconnect to the fresh water hose and you’re done! From then on, all you do is pull back the collar on the quick disconnect and slip the hose in! A five second water hookup! The only thing you have to remember is, when disconnecting, turn OFF the water supply and disconnect the hose at the hookup pedestal FIRST to release the pressure in the line. Not doing so will result in a short bath!

Link #4 is to my recommended sealant tape. This is NOT the cheap 39 cent teflon tape from Home Depot. This is an actual, proper, high performance pipe fitting tape. And who doesn’t like high performance? 🙂

If you use the quick disconnects on your water supply, you can also put one on a hose nozzle! This will eliminate the need for a second water hose! Simply snap the fresh water hose off your supply and snap it onto the nozzle! No more fumbling with an additional hose or added weight on the RV!

Happy Tinkering! I hope you enjoyed this article!


8 thoughts on “RV Water Pressure Regulator

  1. I have read alot of stuff on the net about this topic. There are so many different opinions. Your story is the best i have found. Still looking around.

  2. Thanks for the input Mike! Yes, I do have a pressure regulator on mine, however it’s a new addition. I park my RV at my friend’s warehouse and he has full hookups. The water pressure there is very high since it’s an industrial warehouse, so, better safe than sorry!