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Old 01-12-2018, 09:21 AM   #14
JRTJH
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Join Date: Mar 2011
Location: Gaylord
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Quote:
Originally Posted by Tinner12002 View Post
Well most newer RVs are using the pex water lines so they should be capable of using the same pressures as your bricks and sticks home. Not sure why they say to limit the pressure to 40 something except that may cover all RVs being some still out there have the older style water lines. Even the faucets are residential quality in the newer RVs.
PEX lines with PEX fittings (used in residential construction) are rated well above 40 PSI. PEX lines with ABS (schedule 20) fittings (used in RV applications) is not rated as high as "better quality fittings" would be. When you add the "lesser quality fittings" and put the plumbing in an environment that "shakes, vibrates and rattles" down the highway, it's not going to stand up to the same "reliability standards" as residential construction that never moves once it's "water tested" not to leak. There's a significant difference in the environment where the PEX is used.

I can't speak to "current model" trailers, but I can say that my 2011 Springdale and my 2014 Cougar XLite were both fitted with Phoenix faucets. They are NOT residential quality, they are plastic faucets with "residential valves". Sure they "look like residential stuff" but that's the end of it. Any time you can go on Amazon and buy a complete Phoenix faucet for $18.99 with free shipping, you can't consider it "equal to" a $189 Delta faucet from Home Depot.

Those two factors, Cheap fittings that get shaken around in transit and cheap faucets that look good but ain't, are the main reason why RV water pressure recommendations don't parallel home construction PEX plumbing pressure recommendations.
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