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 to close 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: Designed to prevent backflow, this check valve stops pumped water from returning to the sump basin. By minimizing re-pumping, a fully functional check valve may help extend the life of the sump pump. ABOUT US: We provide sump pump systems designed to help manage water removal and reduce the risk of basement flooding and water damage. Our product line includes Smart Sump Pump Systems that monitor system performance and help ensure proper operation. 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 of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.