WC venting, UPC code

Discussion in 'UPC Plumbing Code Questions' started by DavidTu, Aug 3, 2010.

  1. DavidTu

    DavidTu Member

    Messages:
    239
    Location:
    Seattle, WA
    I have the following situation for a WC (see pics)... the WC is dropping to a closet bend then going down for around 1ft at 45-deg... I can vent it either on the 45-deg drop (so about 10" below WC) or after it levels out (around 14" drop from the WC). I cannot vent before dropping down b/c there is a chimney in the way and I must turn and drop right away.

    Normally, for a fixture the vent take-off must be above the p-trap weir; in a WC of course that is not possible... but I am wondering what the acceptable limits are... or how far can I drop below WC closet flange before venting?

    So am I ok with alternative #1 or #2 (see pics) or must I do something else?

    Thanks!

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,994
    Location:
    Bothell, Washington
    For the water closet, either would be fine. It needs to be a wye or combo fitting on the vent.
    For a water closet, you could even have taken it off the vertical with a wye. In King county, the vent should be within six feet of the flange.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,608
    Location:
    Cave Creek, Arizona
    Either will be fine, but if the inspector is one who only reads the book, but does not know WHY it is in the book, he may have a problem with it.
  4. Terry

    Terry Administrator Staff Member

    Messages:
    14,994
    Location:
    Bothell, Washington
    The Seattle inspectors are good. I don't see a problem.
  5. DavidTu

    DavidTu Member

    Messages:
    239
    Location:
    Seattle, WA
    Thanks much!
Similar Threads: venting code
Forum Title Date
UPC Plumbing Code Questions Venting a tub 6' from any wall, UPC Jul 10, 2010
UPC Plumbing Code Questions UPC codes with respect to Linear Drains Jun 17, 2014
UPC Plumbing Code Questions Is my water lines up to code? Feb 11, 2014
UPC Plumbing Code Questions How should I Plumb this utility sink to code Nov 8, 2013
UPC Plumbing Code Questions Tankless + Tank Code Legal? Feb 11, 2012

Share This Page