Drain Waste Vent Pipe. This requires an air passageway behind the water. The drainpipes collect the water from sinks showers. Pvc dwv is dual marked for pressure and drain waste and vent applications and is nsf approved for drain waste and vent use and nsf pw.
The horizontal vent pipe runs right next to the closet bend. This revert is at least six inches above the overflow line and properly connected with a drainage t.
This requires an air passageway behind the water.
The majority of dwv piping systems are hidden below floors behind walls and in ceilings. Pvc dwv is dual marked for pressure and drain waste and vent applications and is nsf approved for drain waste and vent use and nsf pw. Drain waste vent dwv pipe sizes. In a building the drain waste and vent dwv system is an often overlooked yet essential component of the plumbing infrastructure.
