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Old 09-28-2020, 07:12 AM   #1
PhD, Common Sense
Join Date: Feb 2017
Location: Fairborn, OH
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Water, water, everywhere!

It wasn’t really that bad, but I thought I’d share this minor plumbing explosion because others might benefit and because I might still have a problem that has to be addressed.

We hooked up the camper with a water pressure regulator. It had been set for 45 psi at the last campground. It read 25, so we went about our business of setting up, including turning taps on to get the air out of the system. Suddenly, the base of the kitchen sink spigot starts spraying everywhere. I turn it off, and yell for Mrs. eye to check the pressure at the regulator. 65 psi!!!

Using the nearby outside shower, we get that pressure down to 45 psi—and then set about figuring out what it will take to allow us to use the kitchen sink. After some fiddling around, I determine that the leak is inside the fixture that contains the spigot and the knobs. The only way to get at it is to remove it from the hot and cold lines under the counter.

I don’t know why I did it, but I did. I pushed down on the spigot. Down it went. A lot. Hmmm...I turn on the water. Not a drop from the base of the spigot.

Did 65 psi pop the spigot up a bit, allowing the leak???

We are wrapping up the trip and heading home. The spigot has not been a problem—yet. There probably is something that needs to be tightened. I just have to figure out what.

BTW, pressure at the regulator has stayed steady at 45 psi. I only recently started using an adjustable regulator. I had assumed that once I had set it once to 45 psi, pressures could not go above 45, only below due to low CG pressure. That seems to be wrong. I now check it routinely a few times a day.

This is why we camp. We live for these what-the-frak moments.
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Old 09-28-2020, 07:57 AM   #2
Head Rambler
Join Date: Mar 2008
Location: Southwest Alabama
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Post a picture of the faucet.

Most faucets have two ways of holding the spout in the body. They either use a threaded 'cap' that screws onto the body that the spout goes through and that holds it into the body or they have a setscrew in the body collar (either in the back, or under a small plastic button) that extends into a groove around the spout to hold it in place.
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Old 09-28-2020, 08:13 AM   #3
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Location: South Western PA
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Not sure what you are referring to as "Did 65 psi pop the spigot up a bit"

As Bama suggested, if the 'spout' came up then follow his recommendations.

If the actual knob you turn to adjust water pressure broke loose then we may have different suggestions.

Can you post a photo of your faucet?

Many of these in R/V faucets are made from plastic.
It's hard to say what 65 psi might do.

Also, my adjustable pressure regulator/gauge is pretty spot on no matter the incoming water pressure... meaning if I have it set for 50 PSI @ 60 PSI incoming pressure, it's usually within a pound @ 70PSI incoming pressure without any kind of adjustments.
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Old 09-28-2020, 10:19 AM   #4
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Location: Family room couch
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If you have the red and blue Pex tubing, as a 2017 model should, the plumbing system should be tested to 100 PSI.

If you have a Shurflo water pump as I do, a model 4008, the water pump turns on when the piping pressure drops to 40 PSI and turns off at 55 PSI, +/- 2 lbs psi.

Since the water pump will keep the system pressurized to 55 PSI I wouldn't think 65 PSI should cause an issue like that. I'd be replacing parts to keep it from happening again.

And your story is the exact reason we turn the water spigot (and propane) off when we leave the campground. Glad you caught it in time.

If you're in the habit of turning the water off, glance at the pressure gauge when you shut the spigot off and when you get back. If the pressure drops by the time you get back you have a leak. I've been gone for ten hours and not had a 1 PSI drop.

Once I had a few PSI drop and finally found a slight amount of wet around the external water filter. It was so hot out it evaporated almost immediately. Tightening it a bit stopped the pressure loss.

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Old 09-28-2020, 11:42 AM   #5
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Join Date: Jun 2012
Location: Southern NM
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All the above is good advice. And I will add mine
Just replace the faucet.
OEMs are usually cheap and don't last long. Which is why I replace all mine with good fixtures when I first get a new RV home. Saves me problems later.
While the psi MAY have been the straw that broke the camel's back for your faucet, 65psi is not overly high. The psi at my house is always around 70 and my RV is hooked up w/o a regulator most of the time.
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