Air Admittance Valve - for Illinois and Chicago

Discussion in 'Illinois Plumbing Code Questions' started by BakaFckw, Apr 13, 2018.

  1. BakaFckw

    BakaFckw New Member

    Jul 6, 2017
    Guys and Gal,

    I have a plumbing question in regarding air admittance valve. Based on the Illinois plumbing code 890.1470 section G. Mechanical Vent: mechanical devices shall not be installed in lieu of vent piping.

    I assumed that the air admittance valve are not allowed in Illinois. How about in Chicago? I do not find the section in regarding air admittance valve allowed or not allowed.

    Thanks for answer my question.
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