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 just as described.

Best thing to buy for my sub pump. No more noise and super easy to install. Would highly recommend.

Extremely easy to install just check the pump a couple times to make sure the screws are tight enough. I couldn’t even hear my sump pump go off while standing next to it! I had to confirm it worked with the clear view in the valve. My sump is also sealed for radon.

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.

Works great

I cant speak to longevity, but its fairly quiet and should last longer that the AY Macdonald silent checks due to its superior design. I was shocked to see the packaging started made in the USA. Hard to find at this price point.

super quiet and you can see the unit is working, Great design.

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!

I had bad water hammer every time my sump pump would run. I had a check valve already, the style with an offset silencing air chamber, but decided to give this style a try. It instantly fixed my water hammer issue and my whole family is happy!

I love how quiet & easy to install this was.We dont hear it anymore in the room above truly as advertised!