PVC 1/2" Conduit Coupling. PVC is a Scheduled DWV White Pipe designed for both above and below ground DWV (Drain, Waste, Vent) Applications. Pvc is generally used for both commercial and residential plumbing construction, and Electrical systems. This PVC 1/2" Conduit Coupling is designed for the connection to conduits. The coupling will need to be glued for the most secure connection.