simple venting question

Discussion in 'Plumbing Code Questions' started by pivotal, Feb 27, 2014.

  1. pivotal

    pivotal New Member

    Messages:
    2
    Location:
    portland, or
    hello, could anyone tell me if i need to add a curcuit vent to the right of the sink drain in this photo? IMGP2199.jpg
    that's a washer drain on the far right, a separate lav on the far left. the drain in the middle is the one in question. do i need a vent between it and the washer drain that Tees into the vent stack up where i have those double ells?
    i hope i've done both the venting and this posting correctly. it's my first(posting).
    thanks in advance
    Last edited: Feb 27, 2014
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,246
    Location:
    Land of Cheese
    I would have put another sanitary tee for the sink drain on top of the one for the washer. The way you have it, the washer draining is going to siphon the sink's trap.
  3. pivotal

    pivotal New Member

    Messages:
    2
    Location:
    portland, or
    thanks for the response cacher. i'm a little dense, but i think i follow. so there would be two lateral arms flowing to the stack? being more of a carpenter, i'd love to try and avoid all those holes in the framing.
    btw, what part of wisconsin?
  4. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,246
    Location:
    Land of Cheese
    Correct, 2 separate arms. You will need to make sure they are installed low enough for the sink that you plan to use.

    I am from NW WI, but am currently between Milwaukee & Chicago.
  5. Terry

    Terry Administrator Staff Member

    Messages:
    14,999
    Location:
    Bothell, Washington
    [​IMG]

    It's common for a laundry tray and washer to be plumbed together.

    If the washer is plumber over the sink, it will siphon the trap.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,614
    Location:
    Cave Creek, Arizona
    There is more than one problem with having the sink drain installed where and how you show it. The vent would have to be ON the sink drain before it connects to the horizontal line, to start with.
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