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

Easy install...super quiet. Completely eliminated water hammer noise. Highly recommend. Same day delivery.

It makes the sound of the pump quiet. My guests could hear the sound of the sump pump in the upstairs bedroom at night.

We had the worst banging on our sump pump pipes and just like that they are gone the minute I installed this check valve. Amazing!

I bought this valve because the one installed by the builder is so noisy and wake me up at night everytime the pump runs. After installing this valve, it is super quiet, I cannot even hear it and have a good sleep. Love it.

I have tried other brands/designs of quiet check valves without success. I like this style because of ease of install with the hose clamps. I like the heavy spring inside that keeps the check valve closed rather than a flap style that bounces. This has positive closure and quality design. Ive purchased two and would recommend these.

Now Im concerned whether my sump pump is working or not! I cant here the hammer sound anymore! My pump runs constantly end of winter/spring so Ill be really impressed if this lasts 2-3 years....

Swapped out my old check valve because of the thud it created. This check valve is super quiet

This was easy to install, just slip over the 1-1/2 discharge pipe. My old check valve was chattering when the pump shut off. This valve closes quietly and does not chatter. My pump is quiet now. Problem solved easily and for a reasonable cost. I would buy this again.

We replaced both of our sumps and check valves but the valves we bought would make a loud banging sound when the pump shut off. We installed these and no more noise! Easy to install, Definitely worth buying!

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.