Air Admittance Valve
On a recent hot weather camping trip, we noticed "that smell." You know, the nasty sour GREY water smell you should only experience when dumping the greay water tank? I discovered we have one of these...
Forum Discussion
AAVs in houses vary by area - as mentioned they are common in manufactured homes. The common installation in houses is at a kitchen island sink where there is no reasonable way to vent upward. I'd have to think they did it that way for a reason in the RV - as in no traditional vent nearby.
