Island sink drain and vent (new install) vent question

Discussion in 'Illinois Plumbing Code Questions' started by Mathias, Jan 29, 2020.

  1. Mathias

    Mathias New Member

    Joined:
    Jan 29, 2020
    Location:
    Lake Bluff IL
    I added a sink to my kitchen island. I had no idea venting would be such an issue. My question is, do I need to do the long/complicated configuration under my sink? I’m not sure what it is called. This one has an oval shaped drain/vent where both are connected to main sewer drain line and one of the lines branches off to the main vent. The other option is to use a mechanical vent of some sort. I live in Lake Bluff. I have no idea where to start. Locating the main vent won’t be easy as I waited til the last minute and the cabinets are installed. I don’t know where it is located.
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I think you are referring to an island sink vent. https://terrylove.com/forums/index.php?threads/island-sink-venting.43049/
    http://www.ilga.gov/commission/jcar/admincode/077/077008900K16000R.html
    http://www.ilga.gov/commission/jcar/admincode/077/077008900K14800R.html

    I don't think the AAV is officially permitted. Ask the local code folks how they interpret things.
    http://www.ilga.gov/commission/jcar/admincode/077/077008900K14700R.html
     
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  4. Mathias

    Mathias New Member

    Joined:
    Jan 29, 2020
    Location:
    Lake Bluff IL
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