Air Admittance Valve - for Illinois and Chicago

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BakaFckw

BakaFckw

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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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