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Thread: 2 inch pipe to P Trap

  1. #1
    DIY Member dw85745's Avatar
    Join Date
    Oct 2004

    Default 2 inch pipe to P Trap

    I have a 2 inch horizontal drain line running through the wall cavity that I want to
    turn out for a bath sink. Just found out they don't make 2 inch trap adapters.

    My thoughts are to downsize to 1-1/2 pipe in the wall cavity,
    then use a 90 degree for the turn and then use a 1-1/2 trap adapter.

    Is there a better way?

  2. #2
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Land of Cheese


    It would be helpful to see what you are dealing with, particularly what else is connected to the drain and where the vents are or will be.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona


    Your idea is correct, but whether you can, or should, connect to that "drain line" is open for debate since we know NOTHING about it. Normally you would NOT be permitted to do it without additional design and piping work.
    Licensed residential and commercial plumber

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