Quiet Operation Strategy: in the peaceful sound of silence thanks to spring-loaded flapper design on our sump pump check valve. It strategically eliminates the water hammer noise most check valves generate, perfect for environments where tranquility is prized such as bedrooms or basements.Smart Visibility Execution: The transparent body of this check valve is more than just a sleek design choice. It provides clear visibility into the water movement, giving you peace of mind that the water is flowing smoothly, pipes are free of obstructions, and the pump is operating optimally.Precise and Hassle-Free Installation: Designed to be a perfect match for a 1-1/2inch schedule 40 pipe, this check valve can smoothly integrate into your current plumbing setup. Its compact design requires just a 5-1/8inch , ensuring a snug fit with minimal installation effort required.Exceptional Backflow Protection: the of your system by preventing pumped water from receding back into the sump basin. This eliminates the risk of inefficient double pumping and extends the sump pump's lifespan, ensuring a more and reliable plumbing system. and Resilient Material: Outfitted with 304 stainless steel clamps and rubber couplings that resist corrosion, this silent sump pump check valve stands the test of time. This design guarantees leak-free operation and extended reliability for your sump pump system due to its materials. Colour:Silver & Black Material:Plastic Package Contents: 1x CV-150 Sump Pump Check Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.