just installing a new bathroom but the pipework has a 22mm hot feed and 15 mm cold feed do i reduce down to 15mm hot when connecting to the bath and basin taps ,or just the basin ,and leave 22mm for the bath ..o and i have been out of the plumbing game for 20 years hence the no idea what i am doing questions.cheers if anyone can get me back in track most appreciated..also if i reduce to 15mm for the hot bath tap do i reduce near the bath or at furthest point........