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 CPVC glue(orange) on PVC
Author: MastiffMan (MI)

Had a local "plumber" use CPVC glue on my PVC drain, waste, and vent system. Will it hold?

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 Re: CPVC glue(orange) on PVC
Author: redwood (CT)

No! The pvc cement process is actually 2 step solvent welding while cementing cpvc is a contact cement.

The pvc primer cleans and initially softens the pvc. The cement provides additional softening while the 2 parts are twisted together to mix the 2 then it hardens again.

The cpvc process is more like a glue or contact cement process.

The materials and cements are very different so the bond is not there.



Edited 1 times.

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 Re: CPVC glue(orange) on PVC
Author: packy (MA)

never knew there were so many types of pvc cement. i just walk into the supply house and grab a can off the shelf. of course, i only work with 1 1/2" to 4".
i do use the below zero formula in the winter.
[www.herchem.com]
check that site. it lists all the various cements and their intended uses.
it does sound like the plumber made a mistake. call your local inspector and ask if the job was permited and inspected.
after reading my post, i had better clarify what i said. i grab a can off the shelf, but all the cans are the same. pvc cement, not cpvc cement.



Edited 1 times.

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 Re: CPVC glue(orange) on PVC
Author: jimmy-o (CA)

The spec page link provided by Packy below indicates that CPVC is also a solvent weld process, just different chemicals.

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 Re: CPVC glue(orange) on PVC
Author: alliance (KS)

CPVC cement still will not hold over a period of time. On PVC piping, the primer begins the first step in a chemical reaction. The cement completes the process, chemically fusing the pipe and fittings. CPVC cement although technically a 'solvent weld' by definition does not have the same chemical reaction on PVC.

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 Re: CPVC glue(orange) on PVC
Author: packy (MA)

thinking about this, i would contact hercules chemical directly and ask their opinion. or, find out what brand of cement the plumber used and contact that company.
get an e-mail reply and print it out. you might need it.

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 Re: CPVC glue(orange) on PVC
Author: shacko (MD)

Using a solvent weld that is not designed for the the tube is not allowed where I live, that was banned many years ago. FYI cpvc is also solvent welded, not glued. If you have the wrong cement on your tube I would be concerned.

"If all else fails, read the directions"

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 Re: CPVC glue(orange) on PVC
Author: jimmy-o (CA)

Yes, I was NOT suggesting that the wrong cement would work OK

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 Re: CPVC glue(orange) on PVC
Author: coach606 (IL)

Have you asked the "plumber" who did it about the situation? If it needs to be fixed, I imagine now's the time.

I kind of regret the times when I used local "plumbers" instead of going with licensed pros and inspections. I think most of them did pretty good work, but I also know that they cut corners that wouldn't have been allowed by an inspector. I didn't know any better at the time. I once tried to replace the drain on my shower pan and found the thing rigged up like crazy. The "plumber" had cut the p-trap shorter glued some pieces on it and an o ring and caulked the heck out of it to hold it. It's just a little basement bath and it did work okay until I messed with it.

Then it was either beat the pan out with a sledgehammer and redo it or rig it up again. And you can't hire a licensed plumber to rig things up for you.

Good luck. I hope the guy will see his error and make good on it.

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 Re: CPVC glue(orange) on PVC
Author: moosehorn

Take a look at the following link, [www.wmharvey.com]

There is a question and answer about using CPVC cement on PVC piping.

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