CombiBoiler: 15mm pipework to bath taps?

Question

Hot Water Pipe work (no bath installed)

Distance from boiler to bathroom taps less than 2 meters.

KITCHEN Boiler 15mm -------------15mm--------I-----------15mm----washing machine I Kitchen I Sink Tap I I 15mm 15mm I I I I I -------- I---3/4"---I-----old 3/4"---X Disconnected W A L L I I 3/4" I I 15MM I Bathroom Basin Tap

Could I simply fit 15mm tee below bathrooom hot tap and use 15mm to Bath tap?

I cannot see any point in fitting 22mm pipe run to the 3/4" as diagram shows it will still only be 15mm pipe feed from boiler.

John Rumm · Accepted Answer

15mm should be fine - its not far to the tap and most combis will not deliver enough hot wather flow rate for the pipe size to be much of an issue.

Christian McArdle · Answer

Indeed, and you'll get less dead time with 15mm. I would only install 22mmif it was concealed and the combi might be replaced by a high flow system atsome future juncture.Christian.

Tinklemagoo · Answer