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    pam126's Avatar
    pam126 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 11, 2010, 11:35 PM
    How to connect cpvc to compression shut off valve
    I am at my wits end I know this is supposed to be an easy fix but I have been trying to cement the compression shut off valve to a cpvc pipe and it pops completely off after 5 hours of drying time as if there was no cement at all. Any suggestions its nw 1:30 am here and my main water is still off.
    parttime's Avatar
    parttime Posts: 1,440, Reputation: 113
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    #2

    Feb 12, 2010, 03:41 AM

    pam126, a compression fitting does not require cement, just slip the nut on the cpvc then put the brass ferrule, hand tighten and about one more turn, if it leaks, tighten a little more. Good luck
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #3

    Feb 12, 2010, 04:42 AM
    Hmmm...

    A compression valve certainly doesn't get cemented to a cpvc pipe... ;) In fact, a compression fitting doesn't get installed onto a cpvc pipe in any way that I know of??

    I'm thinking Pam is actually trying to cement a cpvc x compression type shutoff at a fixture and it is popping off... yes, Pam? If so, then the only thing I can tell you is to make sure all the water is out of the pipe, read and follow the instructions on the can and be patient while holding the valve in place. Most important will be to use primer if it is required.

    Back to you, Pam...

    MARK
    Widdershins's Avatar
    Widdershins Posts: 87, Reputation: 5
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    #4

    Feb 12, 2010, 06:38 AM
    Quote Originally Posted by pam126 View Post
    I am at my wits end I know this is supposed to be an easy fix but I have been trying to cement the compression shut off valve to a cpvc pipe and it pops completely off after 5 hours of drying time as if there was no cement at all. any suggestions its nw 1:30 am here and my main water is still off.
    Did you bevel the outer edge of the pipe before you installed the stop?

    If you cut the pipe with a tubing cutter then it likely left a ridge on the pipe, that ridge will often times just push the glue right out of the socket.

    Also, are you using the correct glue and primer?

    The primer should be purple or clear and the glue should be yellow or orange -- I prefer the yellow myself.
    pam126's Avatar
    pam126 Posts: 2, Reputation: 1
    New Member
    		  
    #5

    Feb 12, 2010, 03:14 PM
    Thanks guys got it resolved today bought two new valves and they work fine don't know what happened with other, either way its fixed now. Lol
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