Bad smells under the kitchen sink
I figure this has been covered , and have read the last post blaming the fans. I looked under my kitchen sink and the vent pointing up it seems to me is always open. It is just a rubber flap in a pla...
Forum Discussion
Cheap ones use a flapper held on via a 'tang'
Over time the 'tang' stretches and flapper is not pulled UP tight closing off openings to atmosphere
When draining your waste tank a negative pressure (vacuum) can be pulled on sink drain line. This could suck 'P' traps dry....the 'Air Admittance Valve' allows air to be drawn into drain line after the 'P' trap.
Then they close when dumping of waste tank is completely.
If they don't fully close.......grey tank STINK comes back inside RV
And Grey can STINK worst then Black
Replace with a better AAVs like the Oatley
Over time the 'tang' stretches and flapper is not pulled UP tight closing off openings to atmosphere
When draining your waste tank a negative pressure (vacuum) can be pulled on sink drain line. This could suck 'P' traps dry....the 'Air Admittance Valve' allows air to be drawn into drain line after the 'P' trap.
Then they close when dumping of waste tank is completely.
If they don't fully close.......grey tank STINK comes back inside RV
And Grey can STINK worst then Black
Replace with a better AAVs like the Oatley
