PumpSpy Silent Sump Pump Check Valve - 1-1/2 with Buna-N Couplings, Model CV-150, Spring-Loaded Flapper, Quiet Check Valve, Sump Pump Life Expectancy Increase, Includes Steel Clamps Fit 1-1/2″ Pipe

Works very well at a good price.

Using with a pond recirculating pump to keep the pump primed when not running. After a short, while, small debris in the water stream tends to cause the valve to not seal completely. Still aids in shortening the time it takes for the pump to reprime on restart so we feel it seems to help.

Annoying double Clunk noise after each time sump pump emptied was stopped with new quieter dump pump.

Quite I’ve done 3 different versions this is actually quite no hammering or loud noise. Easy install 30mins to do both my main and backup sump. Highly recommend this product. 2 year warranty on parts.

My sump pumps runs every 15 minutes and the old check valve could be heard throughout our house. There is a 6 lift from the pump to the discharge with the valve installed near the bottom. The new check valve was easy to install and doesnt make a sound when operating, it works as described!

Works great

Amazing! Bought the cheap one from home depot and this one is so much better for only a little more. No loud hammering, no sound at all!

Dont do reviews, but had to on this one. Sump pump bang and vibration was driving us nuts. Installed this in less than five minutes. NO MORE NOISE. Thank goodness. What a relief

Perfect operation....SILENT and the thumping like cheap ones do at pump shut down gone

We build a lot of homes every year and i will be installing these check valves from now on. One of our new homeowners was bothered by the sound of the previous valve so we ordered and installed this one. It was super easy to install and is silent durning on/off cycles!