Pex Vs. Cpvc

 
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Old 02-15-2009, 02:27 PM   #1
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Pex Vs. Cpvc


Getting ready for another new house, again the choice pex or cpvc. I've used both in the past without any major problems. Would like to know from the pro's , after everything is said and done which one comes out
ahead? Cost is not a factor to me, mainly long term performance.
Thanks for your help....
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Old 02-15-2009, 07:53 PM   #2
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Re: Pex Vs. Cpvc


I would use cpvc just because i have had no promblems in the past and the way we run pex with manafolds you can make the cpvc look alot better.

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Old 02-15-2009, 07:58 PM   #3
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Re: Pex Vs. Cpvc


I kinda like being able to shut down fixtures from the manifold location, even though it's not as neat and clean. Pex by a small margin.
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Old 02-15-2009, 08:17 PM   #4
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Re: Pex Vs. Cpvc


Quote:
Originally Posted by mrhbuilder View Post
Getting ready for another new house, again the choice pex or cpvc. I've used both in the past without any major problems. Would like to know from the pro's , after everything is said and done which one comes out
ahead? Cost is not a factor to me, mainly long term performance.
Thanks for your help....

High end? Why not copper if cost is not a factor. I've repaired more pvc then copper in the past 10 years and copper has been out the a whole lot longer.
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Old 02-15-2009, 08:43 PM   #5
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Re: Pex Vs. Cpvc


Even though I like CPVC,nowadays I normally do a pex/copper hybrid.Pex for everything that's not exposed ,and then stub out and trim with copper.
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Old 02-15-2009, 11:27 PM   #6
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Re: Pex Vs. Cpvc


I think CPVC is more difficult to work with, and if it ever freezes it cracks badly...... Pex installs easier, no glue, can freeze and usually never breaks
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Old 02-15-2009, 11:28 PM   #7
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Re: Pex Vs. Cpvc


I understand Pex has volume restrictions when the fittings are installed so most of the fixtures have to be home runs (back to a central manifold). Good news, this eliminates a lot of joints in the walls, bad news is a lot of material is used and bundles of tubing take up space in the walls, joists, soffits etc. It would seem 10 or 12 home runs to the other end of the house to catch a couple of bathrooms may eliminate the cost savings vs. one 3/4 copper line.

I've heard (from local plumbing board official studying whether to allow the stuff in our area) pex does not perform well when water has high chlorine, so it may not be right for some municiple water systems.

It seems most plastic tubing, fittings etc, have some type of recall, weakness, failure over time. It would be nice to know how this stuff will be performing 10-40 years from now. I know copper is tried and true.
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Old 02-16-2009, 02:02 PM   #8
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Re: Pex Vs. Cpvc


Quote:
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I understand Pex has volume restrictions when the fittings are installed so most of the fixtures have to be home runs (back to a central manifold). Good news, this eliminates a lot of joints in the walls, bad news is a lot of material is used and bundles of tubing take up space in the walls, joists, soffits etc. It would seem 10 or 12 home runs to the other end of the house to catch a couple of bathrooms may eliminate the cost savings vs. one 3/4 copper line.

I've heard (from local plumbing board official studying whether to allow the stuff in our area) pex does not perform well when water has high chlorine, so it may not be right for some municiple water systems.

It seems most plastic tubing, fittings etc, have some type of recall, weakness, failure over time. It would be nice to know how this stuff will be performing 10-40 years from now. I know copper is tried and true.
Pex makers claim to have systems in use today that are 30+ years old with no problems..
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Old 02-16-2009, 04:02 PM   #9
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Re: Pex Vs. Cpvc


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High end? Why not copper if cost is not a factor. I've repaired more pvc then copper in the past 10 years and copper has been out the a whole lot longer.
I have copper in my house, but down here in my area the water wears down the pipes, some paper thin after 15 years, I have to play it safe
with plastic...
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Old 02-18-2009, 06:42 PM   #10
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Re: Pex Vs. Cpvc


Ever see what happens to cpvc when the bug guys get their chemicals on it? It melts. cpvc is effected buy petroleum based solvents. Paints, caulks, all kinds of things destroy cpvc. When it bakes in the heat of an attic for about 10 years it becomes extremely brittle.
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Old 02-18-2009, 09:09 PM   #11
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Re: Pex Vs. Cpvc


Pex baby, you better use pex, if you have any clue at all.
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Old 02-19-2009, 05:17 PM   #12
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Re: Pex Vs. Cpvc


Looks like pex....................
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Old 02-19-2009, 07:00 PM   #13
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Re: Pex Vs. Cpvc


A picture is worth a thousand words........
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pex vs. cpvc-dscn2220.jpg  
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Old 02-19-2009, 07:38 PM   #14
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Re: Pex Vs. Cpvc


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A picture is worth a thousand words........
Looks like a homeowner and his glue monster got a hold of that.
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Old 02-19-2009, 08:10 PM   #15
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Re: Pex Vs. Cpvc


The pipe melted after being sprayed with bug spray from the exterminator.
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Old 02-21-2009, 06:57 PM   #16
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Re: Pex Vs. Cpvc


I have just had a fight with a CPVC system, and am not a fan. It is easy enough to install, but when you have to fix it you start a nasty cycle of cutting back and installing more and more couplers and t's. IMHO I would use PEX wirsbo. It will expand and you will not have to worry about busted pipes from freezing, Also if you have a bad connection, all of the connectors are reusable, just cut out the piece, cut a new piece and set it.

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