Cacher_Chick
Test, Don't Guess!
The problem is that the check valve in the pump has failed. The water hammer was a symptom.
The pump needs to be pulled.
You get to decide whether to replace the pump or just install a good quality check valve in the output pipe, directly above the pump.
The pump needs to be pulled.
You get to decide whether to replace the pump or just install a good quality check valve in the output pipe, directly above the pump.