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

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

This check valve eliminated the thump I would get from the replaced one. My sump pump sits right under my family room and with the old valve it sounded so loud I thought things were going to fall apart. But this one eliminated the noise so well I had to listen carefully too make sure my pump was working.

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.

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!

PumpSpy replacing Cant Clunk check valve. Hands down PumpSpy is FAR superior!!

It was very easy to replace the old noisy check valve, and is so much quieter especially when the pump stops flowing and the valve shuts. Will update review long term.