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Thread: PTFE on slipnuts ?

  1. #1
    DIY Senior Member chefwong's Avatar
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    Default PTFE on slipnuts ?

    In one of my satellite office...the bathrooms were just recently redone...
    This is one of the most prestigious bldgs out here in Gotham city and I'm going to state union plumber did the job...

    I know you can use PTFE tape on copper compression if you like...

    But isn't this no-no on slipnut fittings. I noticed they had used it on the slipnuts.

  2. #2
    Plumber jimbo's Avatar
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    You should NEVER use tape on a compression fitting, or a slipnut fitting.

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    Moderator & Master Plumber hj's Avatar
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    Using it is a non-issue. All it does is waste time and materials. If the connection does NOT need a sealant, then using one has absolutely no positive or negative effect on it.
    Licensed residential and commercial plumber

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    Jack of all trades DonL's Avatar
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    Quote Originally Posted by jimbo View Post
    You should NEVER use tape on a compression fitting, or a slipnut fitting.
    I agree.

    That is a good way to plug up a line.
    Theory only works perfect in a vacuum.

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  5. #5
    Moderator & Master Plumber hj's Avatar
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    quote; That is a good way to plug up a line.

    Now, HOW in the world could that EVER happen?
    Licensed residential and commercial plumber

  6. #6
    Plumber jimbo's Avatar
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    Thank you for using the correct terminology...PTFE tape. On this forum, we also sometimes use the term "kleenex" tape, since the big chemical giant won't let us use the T word!

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    Jack of all trades DonL's Avatar
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    Quote Originally Posted by hj View Post
    quote; That is a good way to plug up a line.

    Now, HOW in the world could that EVER happen?

    The excess tape can get into a small line when it gets pinched off.
    Theory only works perfect in a vacuum.

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  8. #8
    Moderator & Master Plumber hj's Avatar
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    quote; The excess tape can get into a small line when it gets pinched off.

    I do not know how YOU apply tape, but I wrap it around the thread and pull it apart, so there is no "excess tape", nor do I have any "small lines" in my drain systems for it to get into.
    Licensed residential and commercial plumber

  9. #9
    Jack of all trades DonL's Avatar
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    Quote Originally Posted by hj View Post
    quote; The excess tape can get into a small line when it gets pinched off.

    I do not know how YOU apply tape, but I wrap it around the thread and pull it apart, so there is no "excess tape", nor do I have any "small lines" in my drain systems for it to get into.
    When uses on a compression fitting many people put it around the compression fitting.

    Otherwise it would not be a problem, if just used on the threads, It would have no where to go.
    Theory only works perfect in a vacuum.

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  10. #10
    Moderator & Master Plumber hj's Avatar
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    The original question was asking about using it on slip nuts, NOT compression fittings.
    Licensed residential and commercial plumber

  11. #11
    Forum Admin, Expert Plumber Terry's Avatar
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    Some people use tape on everything.
    It's my job to go in and remove all the tape and install it right.

    Compression fittings, light oil, at the most.
    Slip joints, nothing
    Flexible supplies (lav or toilet) nothing
    Water heater connectors, nothing

    If you have a tapered pipe thread, National pipe thread, then you can use tape.
    That would be the nipples where they thread "into" the water heater, or installing the T&P for the water heater.
    If the threads are straight cut, then no.

  12. #12
    In the Trades Tom Sawyer's Avatar
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    Quote Originally Posted by Terry View Post
    Some people use tape on everything.
    It's my job to go in and remove all the tape and install it right.

    Compression fittings, light oil, at the most.
    Slip joints, nothing
    Flexible supplies (lav or toilet) nothing
    Water heater connectors, nothing

    If you have a tapered pipe thread, National pipe thread, then you can use tape.
    That would be the nipples where they thread "into" the water heater, or installing the T&P for the water heater.
    If the threads are straight cut, then no.
    Yes.......................
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  13. #13
    Jack of all trades DonL's Avatar
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    Quote Originally Posted by Terry View Post
    Some people use tape on everything.
    It's my job to go in and remove all the tape and install it right.

    Compression fittings, light oil, at the most.
    Slip joints, nothing
    Flexible supplies (lav or toilet) nothing
    Water heater connectors, nothing

    If you have a tapered pipe thread, National pipe thread, then you can use tape.
    That would be the nipples where they thread "into" the water heater, or installing the T&P for the water heater.
    If the threads are straight cut, then no.

    Tape is like WD-40, used once and it worked, it must me good for everything.
    The more the better, in the minds of many.

    Some Internet sites say tape should be used on metal Slip joints but not PVC.


    I have been guilty of using Silicon Rubber on Slip joints threads, and I guess that is a no no. But I do not argue with no leaks and only use it as last resort on my own stuff.
    Theory only works perfect in a vacuum.

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  14. #14
    DIY Member Joe Six Pack's Avatar
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    I use Duck Taype. Iwerks on everythhnig. seriiousy. it'ts htat good.
    Joe Six Pack

  15. #15
    Jack of all trades DonL's Avatar
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    Quote Originally Posted by Joe Six Pack View Post
    I use Duck Taype. Iwerks on everythhnig. seriiousy. it'ts htat good.
    That is good stuff...
    Theory only works perfect in a vacuum.

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