Jase Posted February 20, 2021 Share Posted February 20, 2021 Hi folks doing the bathroom out upstairs only loo and sink in there at the mo so having a bath fitted with a mixer type shower now the room been made bigger . questions is can the bath be 15mm or does it have to be 22mm for flow rate etc. We have a new combi boiler fitted now. So hot tanks gone. Regards Jason. Link to comment Share on other sites More sharing options...
Conor Posted February 20, 2021 Share Posted February 20, 2021 15mm is fine for a bath because your combi wouldn't be able to produce hot water fast enough to need larger pipe. That's exactly what I did when renovating our bathroom, ripped out the old 3/4" copper and replaced it with 15mm plastic pushfit. Took ages to fill a bath but that was because of the boiler, not the pipework. Link to comment Share on other sites More sharing options...
Nickfromwales Posted February 20, 2021 Share Posted February 20, 2021 4 minutes ago, Conor said: 15mm is fine for a bath because your combi wouldn't be able to produce hot water fast enough to need larger pipe. That's exactly what I did when renovating our bathroom, ripped out the old 3/4" copper and replaced it with 15mm plastic pushfit. Took ages to fill a bath but that was because of the boiler, not the pipework. +1. 15mm will be ample. Link to comment Share on other sites More sharing options...
Jase Posted February 21, 2021 Author Share Posted February 21, 2021 Cheers folks Link to comment Share on other sites More sharing options...
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