Drain, Waste, and Vent refers to the complete network of non-pressurized piping in a plumbing system. The drain and waste pipes use gravity to carry greywater and sewage away from fixtures to the sewer or septic line. The vent pipes route upward to the roof, allowing air into the system to equalize pressure and letting foul gases escape safely.
Heard on the job
We need to pressure test the entire DWV system before the drywall crew starts hanging boards tomorrow.
Insider tip
DWV fittings have sweeping, gradual curves to prevent clogs, unlike pressure fittings which have sharp, abrupt angles.
Also heard as
- drain-waste-vent