: Plumbing inspector recommended the use of AAV's in two locations in new home construction. He stated to stay away from the "cheap black ones". Does anyone know what he is referring to and are there any recommendations on what could be considered a "good" AAV? Thanks.
I agree with e-plumber. Good and AAV are an oxymoron--there is no good AAV. Besides, you need at least 1 vent to the outside to even use an AAV (check the directions on the box). If forced to install one, it would be a Studor.