Washing machine drain

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by gagecalman, Nov 28, 2016.

  1. gagecalman

    gagecalman Member

    Joined:
    Nov 25, 2016
    Location:
    Baltimore, MD
    Hello to all. Thanks for your time and help. I am trying learn so I can do things right.
    Working to the IPC.

    I saw this sketch showing a washing machine rough in.
    It is my understanding that the washer can't be wet vented.
    Can the sani-tee's be reversed or will the washer then drain the sink trap?

    In Terry's picture of roughing two sinks:
    Could the drain for the right sink be used for a washer standpipe as long as:
    The drain in the floor is 2".
    The washer standpipe, trap and inlet on lower wye is 2".
    All vents and left drain for sink is 1-1/2".
    1-1/2" out of top of right sani-tee and out of top of lower wye.

    I wanted to mark the sizes on the picture but am not there yet.

    Thanks,
    Jim



    Washing machine rough wrong.jpg single_to_double_lav (1).jpg
     
  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    The green drawing works if properly sized. The washer needs 2" with a 2" trap and standpipe.
    A laundry sink is 2" with a 1.5" trap
    A kitchen sink is 2" with a 1.5" trap
    A bathroom lav can be 1.5" and either a 1.5" trap or 1.25"

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    Last edited: Mar 5, 2019
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  4. gagecalman

    gagecalman Member

    Joined:
    Nov 25, 2016
    Location:
    Baltimore, MD
    Just to be clear all venting is OK at 1-1/2"?
     
  5. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Venting for the washer, sink and lav can be 1.5"
    Toilets get 2"
     
  6. gagecalman

    gagecalman Member

    Joined:
    Nov 25, 2016
    Location:
    Baltimore, MD
    Thank you very much Terry.
    Have a great day!
    Jim
     
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