dufferdj wrote:
Any suggestions as to how to rectify this problem?
You have to identify the actual source of the noise first.
The pump itself will always vibrate but if it is properly mounted with some "flex" it won't make much noise.
As the pump pulses ALL of the pipes will have pressure pulses and any of them can be hitting on a floor or wall or cabinet side.
My pump is fairly quiet but there is a TERRIBLE growl from the pipes under the bathroom sink/floor......that I haven't had time to really track down yet.