sump pump discharge question

volaredon said
My check valve "water hammer's" when the pump shuts off
I have 2 pumps under my house, both same model pump in each pit, one is much worse than the other. Check valve on each pump

pretty easy to fix
they make "silent" check valves

i installed one in my sump pump recently, world of difference

it used to BOOM BOOM BOOM BOOM BOOM each times it shut off, now i cant even hear it anymore

this is the one i used

https://www.amazon.com/Zoeller-30-0242-Quiet-Check-Length/dp/B08DG4QZ3S?tag=fabo03-20