What does "DWV" stand for in plumbing terminology?

"DWV" stands for "Drainage, Waste, and Vent" in plumbing terminology. This term refers to the system of pipes that transport wastewater and sewage from fixtures in buildings, ensuring the safe disposal of these materials while preventing the backflow of harmful gases into the living environment.

In a DWV system, drainage pipes carry wastewater away, waste pipes transport solid and liquid waste to treatment facilities, and vent pipes allow for the release of air and gases that could otherwise build up in the plumbing system. This is crucial for maintaining proper pressure within the pipes and ensuring that waste flows correctly.

The other choices do not accurately capture the meaning of "DWV." Duct Work and Vent relates to HVAC systems, while Discharge, Waste, and Vent and Drainage, Water, and Vent do not reflect the precise components and functions of a typical plumbing system. Thus, the accurate choice underscores the vital elements involved in plumbing infrastructure concerning waste management and air ventilation.