Need To Lower P-traps On Back To Back Bathtubs

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by GMtech, Jul 11, 2020.

  1. GMtech

    GMtech New Member

    Jul 11, 2020
    San Diego, California
    Hi all,

    Long time lurker now stumped!

    I'm working on my honey due list and yes I have been really bored with all the stay at home and distancing.

    I'm replacing the bathtub on the 2nd floor and it is backed up to the master bath tub. I ended up pulling both tubs as there was no room to work and I didn't want to cut holes in the ceiling on the rooms below.

    I will be installing a Kohler Villager tub and the specs call for 2-7/8 inch from the tub bottom to the bottom of the tub drain tee.

    The floor joist are 12" but there is a 2" tee (master bath shower drain) under the 1 1/2 double waste tee the tubs use. I did find a setup that will lower the double tee a little over an inch but would like more wiggle room, any suggestions?

    The master bathtub p-trap was lowered 1 1/4 inch below the elbow, is this up to code or is it ok to do this?

    Thanks much!

    Attached Files:

  2. Jeff H Young

    Jeff H Young In the Trades

    Feb 27, 2020
    needs 2 inch tee for the tubs 1 1/2 " trap arms.
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  4. Mr tee

    Mr tee Member

    May 3, 2020
    You need a double fixture tee, NOT a double sanitary tee. Alas, it will be taller.
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