Venting kitchen sink below window

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jastori, Nov 2, 2010.

  1. jastori

    jastori New Member

    Joined:
    May 2, 2008
    Location:
    Illinois
    We have an unvented kitchen sink (old plumbing, never vented). The sink is below a window, and the nearest access for a vertical vent up is about 3-4 ft away horizontally.

    I don't think we can get 6" above fixture rim due to the window height. Is the island venting approach the best? I have seen references to the "dirty arm" approach but am not sure exactly what the details would be. I also understand AAV, but would like to avoid it if possible.

    We are in Illinois, and I will discuss the details of the approach with our plumbing inspector, but wanted to understand what the options are first.

    Thanks very much!
     
  2. Redwood

    Redwood Master Plumber

    Joined:
    Dec 15, 2007
    Occupation:
    Service Plumber
    Location:
    Connecticut
    You can run the drain and vent alongside the window then extend a dirty arm across to the sink.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. jastori

    jastori New Member

    Joined:
    May 2, 2008
    Location:
    Illinois
    Thanks very much for the quick reply.....

    Can the dirty arm go 3-4' horizontally for a 2" pipe? This is a load bearing wall, so, I am also concerned about whether I can drill for the 2" horizontal run through standard 3 1/2" studs. It would have to pass through at least 3 studs.
     
  5. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    A 1.5" dirty arm can be 42" long, and a 2" dirty arm can be 60" long.

    [​IMG]
     
    Last edited: Nov 2, 2010
  6. geniescience

    geniescience Homeowner

    Joined:
    Nov 27, 2005
    Occupation:
    ditto
    Location:
    humid summers hot, humid winters cold
    Can you run the pipe beside the wall for a while (inside kitchen cabinets) instead of cutting studs?
     
  7. dlarrivee

    dlarrivee New Member

    Joined:
    Jun 28, 2009
    Occupation:
    Foam/Fireproofing/Acoustical
    Location:
    Canada
    Pretty sure sinks have been below windows for years... My kitchen sink just has a long trap arm before the tee...
     
Similar Threads: Venting kitchen
Forum Title Date
Plumbing Forum, Professional & DIY Advice Kitchen sink venting question Mar 9, 2014
Plumbing Forum, Professional & DIY Advice Stubborn kitchen sink venting problem Jun 30, 2013
Plumbing Forum, Professional & DIY Advice Venting a kitchen sink May 9, 2013
Plumbing Forum, Professional & DIY Advice Kitchen sink venting height Mar 31, 2013
Plumbing Forum, Professional & DIY Advice venting question kitchen sink under window Oct 1, 2010

Share This Page