Just had a repair done to the sump pump. The pump is working fine and is relatively quiet. The new check valve however make a banging or hammer sound once the pump shut off from discharging the water. The new valve is a Zoeller 1 1/2" pipe. Are there any check valves that are super quiet, the pump is located in the basement right under a bedroom and the check valve is a bit disturbing. Thank you for your time concerning my issue.