New answers tagged smell
A stutgard? I assume this is a brand of air admittance valve (AAV)? This is basically a one way air valve that allows air into the vent to break any siphon action on the trap seals, but supposedly prevents sewer gases from coming out of the vent into the house. All the AAVs I've seen involve a lightly sprung wafer valve mechanism. They can sometimes become ...
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