Teflon Tape or Thread Compound for leaking 3/4" pipe fitting?

Discussion in 'Bad Dog Cafe' started by DugT, Jul 11, 2019.

  1. DugT

    DugT Tele-Holic

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    It is possible that it is not leaking now. If it is just slightly leaking in the morning, I will try tightening it a little more. If that doesn't work, I will take it apart, clean it, and reassemble with teflon and a bronze coupler. The previous steel tank lasted 16 years with no sign of corrosion at the copper fitting so maybe the steel (I assume steel) threads were coated with something so a bronze coupler isn't necessary.

    The threads should be good because copper doesn't rust and the tank is new.

    I only coated the male threads with compound and I put it on fairly thick. Then I screwed it into the copper fitting by hand until it was tight enough to require a wrench, which was at least three full turns later. After I got it tight with a wrench, I wiped the exposed male threads to see was what going on. Since then I got better wrenches and wrenched it tighter so the compound is being squished thicker at the intersection.

    I took photos of the back of the copper nut section and I see no cracks.

    One way or another, I will solve this problem without any TDPRI members flying out here.
     
    Last edited: Jul 12, 2019
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  2. Hobs

    Hobs Tele-Meister

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    A very slow leak will usually stop leaking after a day or two, as minerals in the water make a seal. Then it will wait, with unimaginable patience, for decades if necessary, for the very most inconvenient time to fail entirely.
     
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  3. Wallo Tweed

    Wallo Tweed Friend of Leo's

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    I'm not a plumber, but I did stay in a crappy motel last night. It sure looks cross threaded to me.
     
    Last edited: Jul 12, 2019
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  4. Milspec

    Milspec Friend of Leo's

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    Especially when you are dealing with steel connecting to soft copper
     
  5. aerhed

    aerhed Friend of Leo's

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    I'm gonna hazard the copper got stretched from the original torque up and so long as it isn't cracked AND your male end isn't bottoming out on the shoulder inside the copper you can torque it sealed. If the male end is actually bottoming out, you need to replace the
    female side.
     
  6. DonM

    DonM Friend of Leo's Silver Supporter

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    I'm a Teflon Tape guy. Great stuff.
     
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  7. Stringbanger

    Stringbanger Telefied Ad Free Member

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    If you have to take it apart and clean the threads, use a good wire brush to do so.
     
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  8. magicfingers99

    magicfingers99 Tele-Afflicted

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    teflon tape...

    how many wraps? well when I asked the fellow, he told me you wrap it until it stops leaking (ie seals the void).

    don't be stingy with that stuff, it really work
    thats an old school pipe joint., looks like hemp thread in there to fill the voids. step up to some teflon tape.
     
  9. Toto'sDad

    Toto'sDad Telefied Ad Free Member

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    I thought that, but for some reason didn't want to be the first to say it. Glad you did.
     
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  10. RetroTeleRod

    RetroTeleRod Poster Extraordinaire

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    My uncle is a retired plumber. The best advice he ever gave me was "Never eat any of the chocolate donuts on the counter at the parts house."
     
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  11. DugT

    DugT Tele-Holic

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    Problem solved. It was still leaking slightly after the last time I tightened it but it hasn't leaked at all since last night so I think I finally got it tight enough. Part of the problem, other than my weak arms, is it was in an awkward overhead position.

    From now on I will use teflon tape on this type of fitting because it is so much easier to get a tight fit with it.

    If it was cross threaded I think it would have leaked a lot no matter tight I got it.

    Thanks for all of the help!

    PS: I'm so glad RodeoTex didn't have to come here to fix it.
     
  12. TwangToInfinity

    TwangToInfinity Tele-Holic

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    yes they really are great, sooo handy, every place with water pipes should have a standby kit with some of those slider connectors!

    theyre such quick and easy problem solvers!
     
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  13. Owenmoney

    Owenmoney Tele-Afflicted

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    If all else fails, use FLEX SEAL


    Sent from my iPad using Tapatalk
     
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