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

    Mar 27, 2016, 08:32 PM
    How to adapt a female cpvc fitting to a shower diverter
    I have 4 cpvc female adapters I need to thread onto a male threaded shower diverter. How do I do this and what happens if I over tighten them
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Mar 27, 2016, 10:15 PM
    Just screw the adapter on then glue pipe to adapter. Use reasonable effort when screwing adapter on. Not really necessary but if it make you feel better, either wrap threads with Teflon tape or coat with pipe thread joint compound. Contrary to popular belief these are not sealers. They are lubricants. They enable you to tighten fittings with less effort.
    Mike45plus's Avatar
    Mike45plus Posts: 230, Reputation: 27
    Full Member
    		  
    #3

    Mar 28, 2016, 04:01 AM
    Ron,
    Plastic female adaptors can be problematic when trying to couple with metal fittings, and, certain types of plastics do not react well with liquid pipe joint compounds; check with the cpvc or compound manufacturer for compatibility. We avoid using plastic female adapters, they can split rather easily while trying to firmly tighten them. When there is no choice and we have to use a plastic adapter, we'll tighten a suitably sized stainless steel clamp on the adapter before assembly. ...
    Oatey Corp makes liquid pipe joint compounds ( they acquired Hercules Chemical ) that will seal & bridge small gaps, threads, and fitting imperfections to help make a water tight joint, Google Hercules Grip......
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #4

    Mar 28, 2016, 07:22 AM
    Hi Ron

    Yeah, if you have the all plastic female adapter, return them and pick up the metal/plastic hybrid CPVC female adapter... only way to go here! They are available at almost all plumbing supply stores. See image:

    Name: image.jpeg Views: 264 Size: 48.9 KB
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #5

    Mar 28, 2016, 09:35 AM
    Plastic (CPVC) female adapter should never screw onto metal male adapter as the CPVC female adapter will eventually crack. It should be the other way: Male CPVC into female metal inlet.

    I agree with Mark's advice: return what ever you already purchased and get the transition adapter Mark posted. That is the best, and the safest, way to go.

    Milo
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