A few months ago, in our new addition, I plumbed an upstairs 3/4 bath in CPVC. I used purple primer (designated for PVC and CPVC) and used clear, medium bodied cement designated for PVC to make the joints. I just realized my error. The walls are still open.

My question is, do I have to re-plumb using the correct cement? Will the PVC cement hold? I've had no leaks so far.

Thanks.

speedball1

Here's what a cement manufacture has to say about it.
Should a gelled or lumpy cement be used?

It is not recommended that you attempt to thin solvent cements. The solvents in the can will evaporate if left open for extended periods of time, causing the product to thicken or gel. Do not used gelled or thickened cements on plastic pipe.

What cement should be used for PVC, CPVC and ABS pipe?

It is important to carefully select the proper solvent cement for your application. PVC cements should be used for PVC pipe and fittings, CPVC cements should be used for CPVC pipe and fittings and ABS cement should be used for ABS pipe and fittings.

Should primer or primer/cleaner be allowed to dry before applying solvent cement?

Because the primers will soften the pipe surface, it is important to apply cement to the pipe and fittings while the primer is still wet for maximum bond strength.
If the joints are holding I would run a pressure test on the work before walling the job in. We pressure test our water pipes at 125 PSI for 8 hours. Good luck, Tom

Mossyhorn

So, if I pressure test at 125 psi for 8 hours, and it holds, I should be OK?

speedball1

That's what the inspector makes us do if we have soldered joints under the slab. Good luck, Tom

Mossyhorn

I'll pressure test and see what happens. Thank you very much for your help, Tom.