Should I remove a galvanized nipple that goes into the p trap in a bathroom sink.

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by slinky, Oct 23, 2011.

  1. slinky

    slinky New Member

    May 18, 2011
    Long Island, NY
    I posted awhile ago about a misaligned drain to the p trap in a bathroom sink.
    Decided to remove the sink/vanity due to age/poor condition, now I have more
    room to work with then before.

    I was advised to remove the galvanized nipple coming out of the wall because it might rot
    out in the bottom and leak and to thread in a pvc male adapter, then a 1/8 bend so the p-trap
    can be more towards the direction that I want it to be.

    I have a very small leak in the hot water shut off valve, so might as well change both of them.
    thinking new is better then old. The leak was coming from where the teflon tape is. Advice? thanks
    Last edited by a moderator: Sep 15, 2013
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Galvanized will eventually rust out, but it could last a long time. If you did want to change it, you could replace it with a brass nipple, or screw on a desanko fitting that would allow you to attach a tubular drain. If you really do need the offset, you could instead install an elbow on that new brass nipple first.

    Adding teflon tape to the compression fitting is almost certainly the cause of the never should be used on a compression fitting. Tape or pipe dope are required on threaded tapered pipe connections, not straight threaded ones as used for compression fittings. If the shutoffs aren't 1/4-turn ones, it wouldn't hurt to change them since you have good access now.
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  4. dlarrivee

    dlarrivee New Member

    Jun 28, 2009
    What he said. :)
  5. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    Your problem will NOT be because the nipple is galvanized, it will probably be because it is TOO long. Remove it and then either screw in a brass Marvel/De Sanko/trap adapter, (whichever it is called in your area), or a male plastic adapter. What you do after you remove the nipple will be determined by what type of sink you use and WHERE you position it.

    Last edited by a moderator: Feb 7, 2012
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