1 yr warranty inspection.
After toilet on first floor fills there is a loud bang. Doesn’t happen in any other faucets/fixtures. Client says that it happens also after a 20+ min shower in the master bath stand up shower (upstairs) also. Didn’t want to run water for 20 min to duplicate. No problems from adjacent tub.
I know I don’t have to fix it - observe and report. I’m just curious as to a fix. Air chambers on each line?