1.5″ Canplas 123281 DWV Backflow Preventer Valve Black Plastic Sewer Check Valve
1.5″ DWV plumbing compatibility. Residential DWV applications. Backflow prevention design. Sink and drain backflow prevention. Constructed from durable black plastic, this unit is lightweight, corrosion-resistant, and easy to install in-line with standard 1.5″ plumbing connections.