What does DWV stand for?

Data With Voice (SAUS)

Dielectric Withstand Voltage (MCD)

Drain, Waste, and Vent - System

Drain, Waste and Ventilation System (SAUS)

Drain, Waste and Vent Pipe (SAUS)

James Doyal, Batavia, IL - Manufacturer code for watercraft hull identification number (USCG)