Hi I have a danze shower valve, head and tub filler and when the toilet is flushed or the sink faucet is on full blast then shuts off there is a banging in the wall by the shower head/valve/filler. It is not a loose pipe as we can see them and feel them from the basement. I replaced the cartridge and the sound did not go away.

Any thoughts are appreciated.

Try to Close and Open all angle stops in that particular bathroom, including toilet...