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Old 09-16-2015, 10:20 PM   #1
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Water Pressure Regulator Device

Do I need a water pressure regulator when hooking up to water at an RV campsite to fill up my fresh water tank? I've heard that it will serve as added protection from damage to my plumbing if there is too much water pressure at the site.
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Old 09-17-2015, 07:26 AM   #2
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Many times , no...but sometimes, yes. I have seen campsite pressure as high as 80psi once. That could make for an inconvenient and messy repair. I have seen pressures all over the map, but that was the highest. I set my adjustable regulator to 50psi and never worry about it again.
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Old 09-17-2015, 07:26 AM   #3
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It's built in my Airstream, so no need.


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Old 09-17-2015, 07:31 AM   #4
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Keith, two problems with the AS internal one.

1) doesn't protect your hose (no biggie????? you be the judge)
2) the AS ones are plastic and prone to leaking (which I suspect is due to a high pressure event) This creates floor rot if it is a small leak over time and a mess if it is a large leak. I re-sealed mine and started using a brass Watts at the spigot. Everything, including the original AS regulator are now protected. Many folks remove the plastic AS one, and I probably will next time I have a reason to disassemble that area for repair or maintenance.
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Old 09-17-2015, 07:32 AM   #5
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My trailer also has a built in regulator. One less thing I feel a need to buy just to have.
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Old 09-17-2015, 07:39 AM   #6
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I might add, mine did leak after a couple years of use. I noted water dripping steadily out the belly pan in that area. I removed and re-sealed the body halves and later got an external brass regulator.
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Old 09-17-2015, 08:21 AM   #7
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Originally Posted by dznf0g View Post
problems with the AS internal one.

1) doesn't protect your hose (no biggie????? you be the judge)
I have two fresh water hoses. Both now have hose clamps on them after the original crimped brass fittings were blown off by campground water pressure.

Now that I have corrected the "weak points", I suspect the internal Airstream pressure regulator cannot be far behind
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Old 09-17-2015, 08:37 AM   #8
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I believe it's the anti-backflow valve on campground spigots that locks water within your fresh water hose and your closed airstream plumbing system that bursts the hose. The water is trapped, expands as the sun heats it up and blows out the weakest point, which fortunately is your fresh water hose.

A second pressure regulator in the system will not prevent this, will it? Keeping an air bubble in your water heater or adding a water pressure accumulator to take up the expansion will.
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Old 09-17-2015, 08:40 AM   #9
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I believe it's the anti-backflow valve on campground spigots that locks water within your fresh water hose and your closed airstream plumbing system that bursts the hose. The water is trapped, expands as the sun heats it up and blows out the weakest point, which fortunately is your fresh water hose.

A second pressure regulator in the system will not prevent this, will it? Keeping an air bubble in your water heater or adding a water pressure accumulator to take up the expansion will.
Interesting. Thanks!
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Old 09-17-2015, 09:16 AM   #10
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I believe it's the anti-backflow valve on campground spigots that locks water within your fresh water hose and your closed airstream plumbing system that bursts the hose. The water is trapped, expands as the sun heats it up and blows out the weakest point, which fortunately is your fresh water hose.

A second pressure regulator in the system will not prevent this, will it? Keeping an air bubble in your water heater or adding a water pressure accumulator to take up the expansion will.
Theoretically, the AS regulator would prevent any pressure rise, due expansion in the hose from entering the AS. Wont help the hose though. I, quite frankly haven't noted this being an issue....maybe in the desert or very high sun load and high temp conditions, but I haven't experienced it.
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Old 09-17-2015, 09:25 AM   #11
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When I first got my preowned 2008 Classic 25fb in 2013 I installed my own regulator on the faucet then the hose to the Airstream. I thought their was something wrong as the water pressure seemed low. When I took my regulator off the faucet the pressure was normal. I had used this faucet regulator on my Casita (it doesn't have built in water regulator) without notice of pressure loss. Since then I just plug the hose directly into the Airstream and let it regulate the pressure. My water inlet is in a compartment in a lower access area so if the regulator would leak it would go straight to the ground. Hopefully its an easy job to replace if ever needed.

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Old 09-17-2015, 09:40 AM   #12
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Hi, I have an external water pressure regulator to protect my hoses. I only use it at camp grounds where their water pressure is real high. Most camp grounds with high water pressure will let you know and/or sale/loan you a pressure regulator. One camp ground told us their water pressure can go higher than 100 lbs.
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Old 09-17-2015, 09:46 AM   #13
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Anyone know what the internal regulator is rated at?
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Old 09-17-2015, 09:54 AM   #14
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Anyone know what the internal regulator is rated at?
This is what I found:

"This combination water pressure-reducer and check valve diaphragm design prevents high-pressure damage often caused by city water systems. This high performance water entry limit water pressure safely to a nominal 65 PSI (50 PSI inline version only) while meeting or surpassing all check valve code requirements."

Not sure exactly what that means though???????
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