QUIET OPERATION: Our sump pump check valve features a spring-loaded flapper that reduces water hammer noise commonly produced by standard check valves. Water hammer occurs when discharged water forces the check valve flapper closed abruptly. This silent check valve helps provide quieter operation for your sump pump system.CLEAR VALVE BODY: This check valve has a transparent body that allows visibility of water flow. It enables easy visual confirmation that water is moving, discharge pipes are not clogged, and the pump is functioning properly.INCLUSIONS: The silent sump pump check valve includes stainless steel clamps and Buna-N rubber couplings for quick and secure installation. The included components are compatible with 2-inch Schedule 40 pipe.KEEP WATER OUT: This check valve is designed to prevent backflow of pumped water into the sump basin. By stopping reverse flow, it helps reduce pump cycling, which may extend the life of the sump pump.ABOUT US: We provide sump pump systems designed to help manage water removal and prevent potential water damage. Our product line includes Smart Sump Pump Systems that monitor operational data and help ensure proper pump function.Color: As Shown Material: ABS + Metal Package Contents: 1 x 2-Inch Check Valve Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement tolerances may vary by +/- 1-3 cm.