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

Solved the banging in my PVC pipes. Super quiet now and I like that I could see the fluid in the valve. Highly recommend. And I like that you can install it horizontally.

Wish I found this years ago. All but eliminated the water hammer of a closing valve. Now when the sump pump runs, we hear a hum, and then nothing. No water hammer or closing valve. Install was easy. 2 clamps on either side. Highly recommended.

Wow! After listening to sump pump pipe knocking and shocking the cast iron pipe joint’s finally relief!! So easy to install, such an easy fix! Everything in the box that was needed!! 5stars+!!

The `clop sound after every sump pump cycle is entirely gone - not even the slightest noise is emitted after a pump cycle. In truth, I never really minded hearing that `clop sound, especially at night when the house is quiet and it is raining heavily outside because it was reassuring to know that the power was on, and the sump pump was doing its job. But, I went for it at twice the cost ($26) of the Home Depot check valves which have the `clop sound but have been 100% reliable in my 30-years of homeownership experience just because I like to keep our home improved and up to date. And, its sorta neat seeing the water flow through its clear body. Bottom line, if the sound of a normal sump pump check valve is annoying heres your quality, quieting solution.

The old one knocked off so hard and loud I thought the neighbors could hear! Now I need to check and see that the sump pump is on! Silent! Did it myself - easy.

Works as advertised.

Easy to install and very quite operating. Have recommend to friends & family

Does not make thumping sound, clean and gives you confidence thats working. Easy to install. Highly recommend it.

It works silently.

Works just as described.