cwmorris
Hi The most likley cause of the banging is water hammer this is normally caused by 1. a loose jumper in a stop valve 2. high water pressure 3. loose pipes. I assume you are in USA where your water pressures are normally higher than us in the UK. Try and determine where the banging is coming from by listening on the pipe back to the entry point.I think also you use shock assorbing devices in your pipework to combat this problem you would need a Plumber to fit this. PS. a jumper is the bit in the valve that is driven down to shut down the flow you may call it by some other name. Hope this helps Colin
