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Thread: Didn't know about pipe dope, now what?

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  1. #1
    DIY Junior Member rafigso's Avatar
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    Default Didn't know about pipe dope, now what?

    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. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    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. #3
    Test, Don't Guess! cacher_chick's Avatar
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    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. #4
    In the Trades Gary Swart's Avatar
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    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. #5
    DIY Junior Member rafigso's Avatar
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    Thank for the quick reply, took everything out and used the dope, everything is good now.

  6. #6
    Moderator & Master Plumber hj's Avatar
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    I never use tape on metal threads, only for PVC.
    Licensed residential and commercial plumber

  7. #7
    In the Trades Tom Sawyer's Avatar
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    I have never used tape in my life for anything except wrapping presents
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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