Drain Waste Vent Pipe

A re vent or revent pipe in a plumbing drain waste vent or dwv system is an auxiliary vent that is attached to the drain pipe close to an individual plumbing fixture.

Drain waste vent pipe.

Vent pipes extend from the drainpipes up through the roof to provide that passage while also carrying odors out of the house. In modern plumbing a drain waste vent or dwv is part of a system that allows air to enter a plumbing system to maintain proper air pressure to enable the removal of sewage and greywater from a dwelling. The main soil stack for toilets is normally a 4 inch pipe. Drain waste vent dwv pipe sizes.

Cresline pvc drain waste and vent dwv pipe is produced using pvc 1120 polyvinyl chloride material to meet or exceed astm d2665 d1785 standards. Showers usually have a 2 inch pipe. 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.

In a building the drain waste and vent dwv system is an often overlooked yet essential component of the plumbing infrastructure. Toilet vent option 2. 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 re vent or revent pipe is routed upwards above the fixture and then horizontally over to a tee that attaches it to the main stack vent pipe.

Toilet vent option 3. Waste is produced at fixtures such as toilets sinks and showers. You may need another elbow of any degree to position the vertical vent where you want it. The horizontal vent pipe runs right next to the closet bend.

The drainpipes collect the water from sinks showers. If the vent wall is parallel to the drain pipe install a 45 degree reducing y and a street elbow to point toward the wall. The fat pipes in your house make up the dwv carrying wastewater to a city sewer line or your private sewer treatment facility called a septic tank and field. Drain waste vent dwv pipes carry waste and water smoothly out of the house without gurgles or fumes.

Drain waste and vent pipe. Importance of maintaining drain waste and vent plumbing in buildings. As the water runs down proper venting is required to avoid a vacuum from being created. The pipes of a dwv system are larger in diameter than normal water supply pipes typically 1 1 4 inches to 4 inches to minimize the possibility of blockages.

By victor hatcher and brian conner.