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

For the first few times after installation it was somewhat noisy, but then it stopped being noisy and has been working as advised. I like seeing the water being pumped out. Id recommend it.

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

Works like a charm and it does not leak. My old one leaked and kept kicking my supm pump on. I tested the replacement and it too leaked so i decided to stop all my cheapo nonsense and get one that was highly rated. The bonus is you can see it working.

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

Have not had it hooked up very long, so will provide mor einfo later.

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.

Works as advertised.

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.

The spring on this required too much force to open. Too much back pressure on pump during start up. This would ruin a new pump faster than normal. Bad

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.