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  1. #1
    Join Date
    Oct 2007
    Posts
    9

    Default Is thread sealant needed for PVC ?

    Is there any need to use thread sealer on a PVC fittings? I am transitioning from 1 1/2 inch copper pipe to PVC. The sweated fitting is threaded along with the PVC adapter. If a sealant is required what type would it be?
    Thanks
    Steve

  2. #2
    Join Date
    Nov 2007
    Location
    Sand Springs, OK
    Posts
    467

    Default Re: Is thread sealant needed for PVC ?

    It is necessary, the gaps between the thread will leak no matter how tight you might get it. I used teflon plumbers tape when I put together fittings for my pool set up.
    Debby in Oklahoma

  3. #3
    Join Date
    Aug 2007
    Posts
    6,480

    Default Re: Is thread sealant needed for PVC ?

    Teflon tape is the ticket. Paste sealants are ok as long as they're rated for plastics or else they attack the chemical bonds of the PVC, making it brittle over time.

  4. #4
    Join Date
    Aug 2007
    Posts
    1,131

    Default Re: Is thread sealant needed for PVC ?

    As pointed out...teflon tape is the safest way to go.

    A few wraps of the white stuff should do the deed. Apply in a clockwise fashion as you face the open end of the threaded male fitting.

    (If you apply it in the wrong direction, it'll get "unthreaded" as you put things together and won't do any good.)

  5. #5
    Join Date
    Oct 2007
    Posts
    9

    Default Re: Is thread sealant needed for PVC ?

    Thanks everyone for the quick reply's.

    Steve

  6. #6
    Join Date
    Feb 2008
    Location
    Nashville, TN
    Posts
    149

    Default Re: Is thread sealant needed for PVC ?

    3 wraps of teflon tape and a smear of pipe dope.

  7. #7
    Join Date
    Feb 2008
    Location
    Memphis, not Egypt
    Posts
    183

    Thumbs up Re: Is thread sealant needed for PVC ?

    Most manufacturers recommend PTFE tap only. But I agree with Misfitter. I mostly use Rectorseal T+2 because I like the permanently soft set. And its okay on everything, even liquid fuel piping.

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