Didn't know about pipe dope, now what?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by rafigso, Jan 9, 2013.

  1. rafigso

    rafigso New Member

    Messages:
    8
    Location:
    Greensboro, NC
    I have 2 shower valves and one of them has a one drop at a time leak from the threads. I used Teflon and no dope. I would have used the dope if I had known about it. Short of cutting out the valve and reconnecting everything, is there a sealant I can put around the outside of the threads to seal this drop by drop leak?

    Thanks in advance,
    Rafael
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,011
    Location:
    Bothell, Washington
    No. There is nothing that will seal from the outside.
    You will have to cut and redo the joint. It may be that it just wasn't tight enough.
    Options are:

    Tape
    Dope
    Tape and dope

    I would normally just use dope. I don't really like getting too much heat near a joint with tape.
  3. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,248
    Location:
    Land of Cheese
    No, removing it and redoing the leaking fitting is the correct method of repair. I prefer solder/sweating valves in place for this reason.
  4. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,350
    Location:
    Yakima WA
    I think the best way to do this is to sweat the male adapter to the copper pipe before screwing the adapter into the shower valve. Additional soldering can be done to complete the installation without getting the valve too hot.
  5. rafigso

    rafigso New Member

    Messages:
    8
    Location:
    Greensboro, NC
    Thank for the quick reply, took everything out and used the dope, everything is good now.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,647
    Location:
    Cave Creek, Arizona
    I never use tape on metal threads, only for PVC.
  7. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,176
    Location:
    Maine
    I have never used tape in my life for anything except wrapping presents
  8. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,161
    Location:
    Houston, TX
    Pipe dope is illegal in Texas.
  9. Terry

    Terry Administrator Staff Member

    Messages:
    15,011
    Location:
    Bothell, Washington
    But not in Washington or Colorado!

    Doesn't help me any though. I like micro beers. I don't put anything in my body that won't wash out in 24 hours.
    THC has a half life of 28 days.
  10. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,161
    Location:
    Houston, TX

    There is nothing better than a Beer after a hard days work.

    Well, maybe a cigarette after you lay a bunch of pipe, that may come close.
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