Have a mixer shower on bathroom taps. Plan to install new mixer shower tower at other end of bath. The pipes to the bath taps are 22mm copper - plan to install plastic reduced compression tee in each of these pipes under the bath and run plastic 15mm pipes under bath , into stud partition wall into shower unit . The cold tap is off the rising mains , and unsure whether to put a pressure reducing valve on the new cold pipe. Have a combi boiler - anything else I may need to be aware of ?
Many thanks
BarryG
Many thanks
BarryG