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Question DetailsAsked on 11/10/2015

PEX or CPVC to replace polybutelene pipes?

I need to have my house repiped, and have gotten varying opinions on what to use.
Copper is just too expensive, so it's between CPVC and PEX.

What's the common opinion and why?

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1 Answer


Largely a matter of homeowner choice (usually based on economics), somewhat on local practice, and then on what specific contractors like. Personally, I would steer well clear of PEX. I still hear a lot about failures even on current work - clamp and connection failures, splitting, kinking due to specified support interval being too long for some applications, and taste issues (though CPVC has that issue to a lesser extent). I can't stand the taste of the plastic chemicals. But to each their own - personally I prefer copper, though it is more expensive both for materials and for labor.

Here are a couple of prior similar questions with responses - othears can be found linked below them and in the Home>Plumbing link.

One consideration that does not always come into the equation is the ease (if your plan ahead) of pulling the PEX along as you pull out the copper, resulting in much less drywall holing to install it. (Yes, you can do the same with copper and rigid plastic but you typically end up with a ton on extra joints because it will not fit into short joist spaces or walls in long lengths).

Answered 4 years ago by LCD

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