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Copper union leak

bob young
bob young Member Posts: 2,177
give it a schmear or wrap the seat with teflon. either method should work. if not solder 'em up or replace or eliminate if not necessary for future disassembly. good luck.


  • Art_2
    Art_2 Member Posts: 1
    Copper Union leaks

    I am presure testing my new radiant heat system. All has gone well except for the copper unions. They are leaking some. I have tightened them up but they still blow some bubbles. Will they seal up on their own or does anyone out there have any tricks on how to get them to seal up? I was thinking of putting a dab of pipe sealant on the union or thought maybe putting some heat on it will help it seat and seal. Any thoughts or ideas out there?

  • Couderay
    Couderay Member Posts: 314

    Clean all surfaces of the union and apply never seize to faces of union seats.and male threads that does it for me works on all unions there is many different never seizes out there i personnaly like the copper colored one and the nickle colored one is good to never use pipe dope on them as getting them broke loose can be a pain in the rear but that is my opinion.
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