Laundry p trap venting

Discussion in 'Plumbing Code Questions' started by Stevenson stevo stevers, Dec 31, 2019.

  1. Stevenson stevo stevers

    Stevenson stevo stevers New Member

    Joined:
    Dec 30, 2019
    Location:
    Los Angeles, CA
    I would like the p trap to be in the wall instead of outside. I dont have enough space to place a dryer next to the washer with the exterior p trap.

    I currently have 1 1/2" pipe for the drain and p trap and I was told 2" is required? I'm in california.

    My issue is that there is not enough space in the wall. The drain pipe is attached to a 3" vent pipe that occupies most of the space.

    I was hoping to remove the existing 1 1/2" drain and attach directly to the 3" vent pipe. Will that work. I attached pictures that are obviously not to scale but I hope you can understand them.
     

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    You can't run the washer down the toilet vent.
     
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  4. Stevenson stevo stevers

    Stevenson stevo stevers New Member

    Joined:
    Dec 30, 2019
    Location:
    Los Angeles, CA
    Any suggestions on getting a ptrap to fit in the wall?
     
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