PVC to copper joint needs sealed

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by tdkdpt, Dec 28, 2020.

  1. tdkdpt

    tdkdpt New Member

    Joined:
    Feb 19, 2020
    Location:
    Ohio
    So I have this issue under my
    Kitchen sink where the new PVC pipe attaching to the old copper stub out is leaking. This is a non-threaded joint so i was a little worried about this when I put it together.

    my question is, how do I seal this joint to stop the leaking? Would a PVC glue work? Pipe dope? Etc??
    I’ll try to post a pic of the joint in question. Thanks so much!

    [​IMG]
     

    Attached Files:

    Last edited by a moderator: Dec 28, 2020
  2. wwhitney

    wwhitney Well-Known Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    What is the leftmost PVC fitting in your photo? I'm not aware of a way to make a non-threaded joint directly between copper DWV and Schedule 40 PVC.

    Cheers, Wayne
     
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  4. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    If that is 1-5/8 OD copper (1-1/2 inch copper) I would cut that pipe closer to the wall, and solder on a copper trap adapter.

    [​IMG]

    Your less elegant, but solder free, would be to cut the copper shorter, and use the proper shielded coupler to couple a spigot plastic trap adapter to the copper pipe.
     
    Last edited by a moderator: Dec 28, 2020
    Tuttles Revenge and Helper Dave like this.
  5. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    The easiest way to make that water tight connection is with a shielded rubber coupling. Find one that transitions from Copper to PVC/IPS and replace the bushing inserted into the trap adapter with a small section of PVC pipe. ***as mentioned above by reach4***
     
  6. dj2

    dj2 In the Trades

    Joined:
    Aug 13, 2013
    Location:
    California
    Do as reach4 suggested.
     
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