DWV Meaning
In residential and commercial plumbing engineering, the acronym DWV stands for 'Drain-Waste-Vent'—the integrated piping network responsible for evacuating wastewater, sanitary waste, and greywater from plumbing fixtures while regulating atmospheric air pressure to protect protective trap seals. Governed by the International Plumbing Code (IPC) and Uniform Plumbing Code (UPC), the DWV system operates entirely under gravity flow and atmospheric pressure, contrasting fundamentally with pressurized potable water supply lines.