Hi, im in the process of replacing my bathroom and am a little uncertai
of what size copper pipes to use. My current bathroom was fitted when w had a back boiler but since then i have had a 18Ltr Combi fitted. My question is the existing hot water supply in the bathroom is 22mm t the Hot and 15mm to the cold. Is there any reason to keep the hot a
22mm or would 15 be sufficient. i am also fitting a thermostatic showe would 15mm be enough for that too? my cold supply is high so i am als fitting a pressure reducing valve. Any help and advice would be greatly apreciated. Thanks, colt.-- colt ceavers