Wet Venting confusion

Discussion in 'IPC Plumbing Code Questions' started by Spoolofpipe, Sep 5, 2018.

  1. Spoolofpipe

    Spoolofpipe New Member

    Joined:
    Sep 5, 2018
    Location:
    Austin, TX
    We are in a odd situation, we are under IPC 2015 and the inspector is not signing off on our design

    The system is designed like this

    4" sanitary line out < 4x4x3 Combination Wye-1/8 bend < toilet

    3" common drain (horizontal wet vent for toilet) that serves 2 sinks, washer, and a shower

    the sinks, washer and shower all dry vent out of the common stack

    only the toilet is wet vented through the 3" drain/vent, our MEP engineer says its good, our Code guy says its good, QA says its good, but the inspector does not agree

    Thoughts?
     
  2. Terry

    Terry Administrator Staff Member

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    Occupation:
    Plumber
    Location:
    Bothell, Washington
    How about a sketch of what you've done. 800 pixels or less.
     
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  4. Spoolofpipe

    Spoolofpipe New Member

    Joined:
    Sep 5, 2018
    Location:
    Austin, TX
    its very similar to this:
    [​IMG]


    except instead there is no floor drain and the bathtub is a washing machine drain and the leg from the toilet to the main line is 4" and the entire common drain and vent stack are 3"
     
  5. Spoolofpipe

    Spoolofpipe New Member

    Joined:
    Sep 5, 2018
    Location:
    Austin, TX
    Here is a quick sketch of our configuration:

    [​IMG]

    Thanks
     
  6. Terry

    Terry Administrator Staff Member

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    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    The washer is doing it to you. That needs to wye in downstream of the toilet if you want to wet vent the toilet by the lavs and shower.
    The washer isn't considered part of the the bathroom group for wet venting.

    Or you can add a vent for the toilet.
     
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  7. Spoolofpipe

    Spoolofpipe New Member

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    Sep 5, 2018
    Location:
    Austin, TX
    Thanks Terry, I appreciate it, Definitely going to vent the washer downstream of the toilet, that will be much easier to rework

    just in case, I have read that part of the IPC like 30 times, where would it say that about the washer?
     
  8. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Last edited: Sep 5, 2018
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  9. Spoolofpipe

    Spoolofpipe New Member

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    Sep 5, 2018
    Location:
    Austin, TX
    so another thing I just realized, the sink on the far side of that wet wall is for a kitchen, so that means I need to move it out of the wet vent line for the toilet correct?

    what do you mean by unwashed 3"?

    we hadnt installed any cleanouts as we were relying on the washer drain as the "removable fixture" to snake through
     
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