tub drain thru joist layout

Discussion in 'Shower & Bathtub Forum & Blog' started by kevinrx1, Mar 21, 2013.

  1. kevinrx1

    kevinrx1 New Member

    Mar 16, 2013

    Due to windows I have to drill a 2" drain hole thru the middle of a 2x12 joist to set my tub drain. Before I do, is it okay to run the drain at a 90 degree angle ( long sweep ) on the arm for the p-trap before heading to the vertical vent/waste? It's less than 2 feet each way. See pic...

    Thanks for the advice!

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    A 1.5" trap arm can be 42"
    A 2.0" trap arm can be 60"

    You are allowed the 90 bend.
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