[Quiet Running] The check valve features unique spring loaded flapper, helping reduce noise, allowing for quiet sewage pump running, suitable for bedroom, basement, and more. [Transparent Body] The transparent body allows clear visibility of waterflow, easily confirm whether the pipe is unobstructed and whether the pump is operating normally. [Precise Fit] Designed for 1-1/2 inch schedule 40 pipes, the sewage pump check valve can be easily integrated into your existing pipe setup, fits in 5-1/8 inch clearance, ensuring a tight fit. [Prevent Water Backflow] Guard your sewage system from water backflow with this check valve, which effectively prevents pumped water from flowing back into the sewage basin. [Long Lasting] The quiet sewage pump check valve is made of 304 stainless steel clamp and rubber coupling, anti corrosive and rusty, ensuring no leakage and long lasting performance., Manufacturer: Badafaci