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Travissr · Dec 29, 2007, 05:51 PM

I recently plumbed my first house using cpvc supply and when I started on the drain lines I realized that I had used pvc cement instead of cpvc cement on all the supply lines. Will the cement I used hold up or am I going to have to take it all out and redo it.

ballengerb1 · Dec 29, 2007, 08:13 PM

You can use purple PVC primer on CPVC but you can't use PVC cement unless it says so on the can. If the can just says PVC you need to get the orange stuff made for CPVC. There are some cements on the market that say they work on both, do you have that one?

Travissr · Dec 29, 2007, 08:33 PM

I am pretty sure that I used the stuff for pvc only. So am I going to have to redo everything that I have done? Or what do I need to do to fix my problem?

labman · Dec 29, 2007, 10:21 PM

This isn't the first such question. The safest thing is to rip it all out now. While it could work fine for a while, you don't want joints inside a wall coming undone 10 years from now. Tom has asked if they might put the same stuff in both cans. Could be.

ballengerb1 · Dec 30, 2007, 09:50 AM

"So am i going to have to redo everything that i have done? " yep, afraid this is the only correct solution. The PVC glue actually melts the plastic not just glues it. With the presence of Chlorine in the chemical makeup of CPVC the melt isn't as complete as it needs to be.

Travissr · Dec 30, 2007, 05:08 PM

What I actually used was oatley medium clear pvc cement. Does that make any difference?

ballengerb1 · Dec 30, 2007, 05:43 PM

That's Oatey, it is only for PVC, sorry but it looks like you are still tearing it out.