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Old 11-18-2009, 08:38 AM   #1
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CPVC Question

I have a question. Has anyone tried
using 1/2" CPVC instead of PEX to
replace the original copper water lines.
CPVC is the "hot water variety" and has
some good properties. It could be used
on both hot and cold lines.

Question: Has it been tried?
Question: What do you think?
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Old 11-18-2009, 10:52 AM   #2
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I have regular white Schedule 40 pvc on all my clean water plumbing with no issues. It in fact is very easy to work with. I didn't install it, but have made a change or two and it is easy peasy. the CPVC shouldn't be any different. I've plumbed with that as well, just not in a camper.
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Old 11-18-2009, 11:50 AM   #3
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Never used it in the TT, but we have used in in some of our industrial darkroom trailers and it worked well for us. It's certainly cheaper and easier to work with than copper.

I suppose that if I was patching something together I might use it. But if I was re-plumbing a whole trailer I'd probable go with pex.

Just my thoughts,

Kevin
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Old 11-18-2009, 12:25 PM   #4
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Follow up question:

What are the cost/benefit/performance
advantages to using PEX over CPVC.
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Old 11-18-2009, 01:40 PM   #5
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I replumbed my Safari completely with CPVC after gutting it. It went in quick and easy. One of the things I like about it is that it is more rigid than pex and was easy to slope all lines to the drains without low spots. I have only to open two valves and the trailer is 98% free of water. I have to drain the flexible shower hose separately and put a little antifreeze in the traps to winterize. I experienced no leaks after installation and have tested the entire system to 75 PSI. The pipe and fittings are readily available and reasonably priced. I would recommend it.
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Old 11-18-2009, 01:48 PM   #6
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CPVC should work ok,but if you need to use bug spray,make sure it is water based.CPVC will deteriorate when exposed to any kind of petro. products.
PVC should never be used for hot water use,if you use it long enough,you will find out why. Dave
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Old 11-18-2009, 02:01 PM   #7
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I am very glad about this thread. After I got my 71 Overlander, I made some quick repairs to the water lines with CPVC so we could have water in the trailer. This winter, I was going to totally remove all of the water lines (both copper and the CPVC) and go with PEX. I was not looking forward to it since I did not know much about PEX and where I live it is hard to find, both the hose and the connectors, let alone trying to find the tools needed. I think I might just go the CPVC route for everything, if the majority agrees it is ok.
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Old 11-18-2009, 02:41 PM   #8
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I would avoid CPVC. I think it's less resist to brittle fracture at cold temperatures than pex.

. . . but my trailer sits outside all winter in Minnesota.

Also, I think the little critters like to gnaw on CPVC more than pex.
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Old 11-18-2009, 05:09 PM   #9
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Cpvc

Airstream produced trailers for two years, as I understand it, with CPVC. I own a 1997 34FK Excella 1000 and it came from the factory with both cold and hot lines made of CPVC
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Old 11-18-2009, 05:31 PM   #10
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I replace all plumbing in a small home with CPVC on both hot & cold side several years ago and have had no problems I would not hesitate to use it in the AS.
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Old 11-18-2009, 07:50 PM   #11
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My house is plumbed with CPVC, it replaced the grey Polly-B stuff that had all the problems. My trailer is PEX. With CPVC and PVC you have very little flex and all connections have to very close with the angle going to the connections. PEX is very flexible and you only need to be close.
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Old 11-18-2009, 07:57 PM   #12
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Quote:
Originally Posted by decanada View Post
Airstream produced trailers for two years, as I understand it, with CPVC.
Then they stopped? What do they use now?
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Old 11-18-2009, 08:13 PM   #13
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My house is done entirely with 3/4" CPVC but it is not going down the road (at least I hope not lol). I was just wondering how it would stand up to the vibration in the TT.
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Old 11-18-2009, 08:37 PM   #14
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PVC and presumably CPVC are said to release small quantities of chemicals into the water that are endocrine disrupters, especially affecting men and boys. Research on this has been going on for some time, but it rarely heard about in the US. I have done a whole house in CPVC without any plumbing problems (and am still a man), but didn't know any of this years ago. It seems that years after a plastic is on the market, many of them are shown to have problems.

If I were going to do it again, I would look at other products. I have no idea about PEX and whether there have been problems affecting people with it.

All the pipes in our water company are PVC. This doesn't make me feel good, but the worst effects are said to be on the youngest and I'm not one of them.

I imagine Airstream uses PEX because it is labor saving and bends around things in the cramped spaces available.

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