Venting a toilet in the Wall behind the toilet but the drain is across the room?

Discussion in 'Toilet Forum discussions' started by Weekend DYI, Feb 17, 2010.

  1. Weekend DYI

    Weekend DYI never ending repairs

    Messages:
    3
    Location:
    Seattle
    Can anyone tell me if I can add a vent only behind the Toilet and use a 3" ABS Sweeping 90 TEE to do so? The actual drain is 9 feet away across the room. See my attached Drawing.

    Attached Files:

  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,272
    Location:
    Cave Creek, Arizona
    Your question is confusing. The pipe going up the wall behind the toilet is its vent. The other pipe will only be a legal vent if your inspector would approve it. Some would, but many would not.
  3. Weekend DYI

    Weekend DYI never ending repairs

    Messages:
    3
    Location:
    Seattle
    So you are saying to vent behind the toilet like this is ok, even though to do it, I have to tee at the toilet flange?
  4. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,282
    Location:
    Land of Cheese
    Your picture is not clear as to how exactly you plan to make the connection.

    The vent cannot run horizontally behind the toilet so a tee would not work. A wye would work, depending on exactly how the connections are made.
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