Easy question (?)

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by MarkyMarky, Jun 17, 2009.

  1. MarkyMarky

    MarkyMarky New Member

    Jun 17, 2009
    Dear All,
    Thanks for reading this post. On my kitchen sink, the tailpipe and the trap keep coming disconnected, probably because the vibration of the garbage disposal causes the two to vibrate so much that the trap eventually slips off of the tailpipe. Of course, once it's off, it's an awful mess!

    So, I'm confused because there are no threads on the tailpipe to screw on the trap's slipnut. It was set up by the original plumber so that the trap just shoves up onto the tailpipe. I guess that's normal, but I don't know because I don't have any plumbing experience.

    So what do I do to keep that trap from slipping off? I've shoved it back up several times, but it just keeps slipping off more and more.

    Is plumber's putty enough to keep it together? Or should I combine that with duct tape?

    Thank you in advance for any advice! :)
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    The tailpiece is smooth. It should slip into the trap adapter. There should be a beveled washer that fits around the tailpiece that is wedged tight around it by the nut on the trap. If the washer is backwards or the nut isn't tightened enough, it can fall apart. The tapered side of the washer should point into the trap (with the flat side compressed by the nut).
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  4. MarkyMarky

    MarkyMarky New Member

    Jun 17, 2009
    Ok, I'll check that out. Thanks for the tip!
  5. kingsotall

    kingsotall Plunger/TurdPuncher

    Aug 17, 2008
    Hand copper part cleaned ready to go
    Flagstaff, AZ Sitting on an upside down 5 gallon b
    The only one on this board authorized to use duct tape is nhmaster and that's only on gas related threads.
  6. BAPlumber

    BAPlumber Plumber

    Jul 18, 2007
    Journeyman Plumber, business owner
    Vashon, Washington
    sounds like you need a longer tail piece. all tubing and sockets should bottom out without stress on the system.

    I used duct tape on gas pipe the other day, seemed to keep the dirt out.
    Last edited: Jun 17, 2009
  7. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    If it is coming apart it is either not assembled correctly, or some pieces were cut too short.
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