cnt belive your so called plumber couldent tell u that any plumber that has half a clue would know that was water hammer and the first and most simple remidy to try was to turn presure down a bit
im installing a manual shower on a combi system i just want to know for the hot and cold supply do i need to take the hot supply from pipe straight out of boiler or can i tee into closest hot pipe same with cold ...i do have very good pressure... :?: