Venting ejector pit to basement bathroom vent?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by curious_george, Mar 26, 2014.

  1. curious_george

    curious_george New Member

    Messages:
    13
    Location:
    Chicago, IL
    I have a kitchen on the main floor and right below is an ejector pit that serves a bathroom(toilet/shower/sink) & floor drains. This is a 1950s house with a finished basement.

    Here are the drain connections for the basement bathroom:

    -> [shower drain{below concrete}]
    ----> [toilet drain{below concrete} + shower drain]
    --------> [toilet + shower + sink drain{above concrete}]
    ----------------> section1{below concrete}: empties to ejector pit inlet
    ----------------> section2{above concrete}: 1 1/2" pipe going straight up

    I assume the 1 1/2" pipe is the vent stack, and I assume the sink from the kitchen on the main floor ties into this vent as well. There's no roof penetration at the corresponding location, so it possibly vents directly into the attic or in the attic it shoots across the building into the 4" stack from the bathroom on the main floor.

    Question is: can the ejector tie into this same 1 1/2" vent that the basement bathroom + main floor kitchen use? This is the approach one plumber wants to take. I've read threads related to this but can't get a clear picture if it's allowed under the Chicago plumbing code.
  2. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    Nope, the pit needs a 2" vent
  3. curious_george

    curious_george New Member

    Messages:
    13
    Location:
    Chicago, IL
    Last edited: Mar 26, 2014
  4. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,068
    Location:
    Maine
    I'm not seeing a vent, I'm seeing the pump discharge pipe
  5. curious_george

    curious_george New Member

    Messages:
    13
    Location:
    Chicago, IL
    Correct, the pit does not currently have a vent at all. I just asked a plumber to install one(for sanitary reasons) & tying it into the bathroom vent is the approach he wants to take. Asking if this will simply work properly, and then if it is up to code.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,276
    Location:
    Cave Creek, Arizona
    Chicago "code" unless it has changed in the last 40 years, was ALWAYS a 2" vent for a toilet. When you ask about connecting to a 1 1/2" vent, you have to differentiate between what is code and what will work, because the two are not always in agreement.
  7. curious_george

    curious_george New Member

    Messages:
    13
    Location:
    Chicago, IL
    So it will not be up to code, got it.

    Second part - will it work?

    I believe the toilet/sink/shower are vented through a "wet vent" that also connects to my kitchen upstairs.
Similar Threads: Venting ejector
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & Venting issue after new pump installed in ejector pit (with picture)! Jul 21, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Ejector Pit Venting Jul 18, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Ejector Basin venting question Apr 8, 2013
Plumbing Forum, Professional & DIY Advice, Tips & Ejector pump venting Dec 19, 2012
Plumbing Forum, Professional & DIY Advice, Tips & Sewage Ejector Venting Dec 10, 2012

Share This Page