We hired a plumber to add a master bath to our house, dual lav, shower, toilet. For the dual lav, he installed 2" stub outs almost directly in line (maybe an inch offset) from the lav drain, through the cabinet back, into the wall cavity, into a wye with an AAV elevated 4' above the lav inside the wall and next to an electrical box for each sink. Plumbing inspector said move the AAVs under the sink, not sealed in a wall behind a light fixture. (I agree FWIW). So he cut out the AAVs and...
Dual lav vent/drain conflict
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