Banging noise on filling?

Consider that you may have water hammer in the supply pipes - as a valve closes a pressure wave is sent back and forth causing the pipes to vibrate - like water in a bath sloshing from one end to the other - an electronics engineer sees the same thing on high speed signal cables - terminators soak up the excess energy.

You might try slightly adjusting the water pressure at a nearby stop valve.

Listen carefully - is it the machine making the noise or the pipes leading to it?

Good luck...

Pitt the Younger
September 2014