Quiet Sump Pump Check Valve, 2 Inch PVC Check Valve Fits 2" Schedule 40 Pipe, Clear, Silent Backflow Valve With Spring Loaded Flapper, Reduces Water Hammer Noise

Tellingyou Sump Pump Check Valve Fits 1-1/2 inch or 1-1/4 inch Pipe

★ 9.8/10

Zoeller Pro Quiet Sump Pump Check Valve

★ 9.8/10

The Basement Watchdog 1.5" Quiet Sump Pump Check Valve - Durable PVC w/Rubber Unions - Easy to Install - Rigid Reinforced Design (BW-CVK15)

★ 9.6/10

Merrill MFG 1-1/4" MIP x 1-1/4" Barb or 1-1/2" Slip Sump Pump Check Valve – Durable Non-Return Valve for Water Pump Systems

★ 9.4/10

PumpSpy Silent Check Valve - 1-1/2" with Buna-N Couplings, Model CV-150, Spring-Loaded

★ 9.4/10

Red Lion SCV114, 1-14" and 1-1/2" ABS Sump Pump Check Valve

★ 9.2/10