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

Like it states zero sound, now I hear the sump pump

Goodbye water hammering. We purchased our current house in Oct. 2022. Our last house didnt have a sump pump, so we werent sure what the loud banging was at first. After some googling, I realized it was the check valve on the sump pump. The noise annoyed us most of the winter, and we really knew it had to stop once we found out were expecting our first child (due in July). I finally ordered this valve and swapped it out this morning. The sump pump kicked on a couple minutes later. No more water hammering. For anyone wondering, the pipe coming out of our sump pump is 1-1/4 galvanized. I was able to tighten the 1-1/2 sleeves on this valve enough, but I would recommend getting reducer sleeves (1-1/2x1-1/4).

I replaced my aging sump pump and the new one was apparently strong enough to cause some sleep-robbing noise from the existing check valve. I added another cheap check valve hoping that would relieve it. It helped but was still noisy. I replaced both with these PumpSpy check valves in and the noise is gone. Hallelujah!

easy to install (careful with the dimensions if replacing a different type). My old valve (Klunkless type) failed. I got this one on Amazon as none was available at HD next to me. the older one used to make a sound when closing. This one is great, impressively silent. and being transparent is great to avoid the week or so until noticing failure like the older one.

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

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!