Description: The Bang4Buck Quiet Sump Pump Check Valve will fit 1.5" pipe and is made from durable ABS plastic. A high quality weighted flapper valve ensures water remaining in the pipe does not flow back into your sump basin. Package includes four stainless steel hose clamps.it has a distinctive spring loaded flapper that helps take away the water hammer noise that standard check valves produce; The water hammer noise occurs when the discharged water slams the check valve flapper down; Experience a quiet sump pump operation with this check valve's distinctive spring loaded flapper; Ideal for bedrooms, basements, or any area where noise reduction is crucial. Transparent Valve Body for Visibility : Provides visibility to water movement; Easily confirm pipes are clear of obstructions, and the sump pump in the basin is functioning optimally; allows you to monitor your sump system effortlessly Precision Fit for Easy Installation : the sump pump check valve effortlessly integrates into your existing plumbing setup; it ensures a snug fit, enjoy a hassle free installation process Prevent Water Backflow : It effectively prevents pumped water from falling back into the sump basin, ensuring the pump operates efficiently and prolonging its life expectancy Leak Free and Corrosion Resistant : These components are corrosion resistant and rust proof, ensuring a leak free performance; Easy to install, these durable materials provide long lasting reliability for your sump pump system