I have been advised that new condensor boilers require a 28mm gas feed. My installer has said that he intends to increase the current 22mm pipework from the meter in the garage to 28mm but the pipework from the garage to the boiler (under floorboards to the airing cupbard are 22mm). Will this be a waste of time if a 22mm section remains in place?
Surely the gas flow rate is limited by the narrowest diameter within the gas feed.
Surely the gas flow rate is limited by the narrowest diameter within the gas feed.