1.5 Inch Canplas 123281 DWV Backflow Preventer Valve Black Plastic Sewer Check Valve

Prevent unwanted backflow and protect your plumbing system with this 1.5″ Canplas 123281 DWV Backflow Preventer Valve.

Designed for use in RV, trailer, and general drain-waste-vent (DWV) systems, this valve ensures proper flow direction and helps eliminate the risk of contaminated or reverse-flowing wastewater.

Constructed from durable black plastic, this unit is lightweight, corrosion-resistant, and easy to install in-line with standard 1.5″ plumbing connections. Flow direction is clearly marked on the housing for proper installation. Ideal for RV gray water systems, sink drains, and other low-pressure drainage applications.

Key Features

• 1.5″ DWV plumbing compatibility
• Canplas part #123281
• Backflow prevention design
• Durable black plastic construction
• Lightweight and corrosion resistant
• Clearly marked flow direction
• Simple inline installation
• Ideal for RV and trailer plumbing systems
• Low maintenance operation

Applications

• RV gray water plumbing systems
• Travel trailer drain systems
• Sink and drain backflow prevention
• Camper plumbing upgrades
• Mobile plumbing systems
• Residential DWV applications

⚠️ Verify compatibility with your specific use case before purchase. Professional installation recommended where applicable.

Condition

New surplus (unused, may show minor cosmetic wear from storage or handling).