I have an old potterton wall hung boiler which has a gas pipe connection in 15mm diameter (copper).
I am thinking of upgrading to a new boiler but all new boilers seem to have a 22mm connection for the gas supply.
Does this mean the whole gas pipe from the branch conenction will have to be upsized to 22mm or can the pipe near the boiler have a reducer, 22-15mm. The meter is literally 1-1.5 metres from the boiler, we also have a gas fire which is about 2-3 meters from the gas meter.
The pipe from the meter is in steel (low carbon...) and the pipe to the boiler is in copper so it must tee off under the floor.
I am thinking of upgrading to a new boiler but all new boilers seem to have a 22mm connection for the gas supply.
Does this mean the whole gas pipe from the branch conenction will have to be upsized to 22mm or can the pipe near the boiler have a reducer, 22-15mm. The meter is literally 1-1.5 metres from the boiler, we also have a gas fire which is about 2-3 meters from the gas meter.
The pipe from the meter is in steel (low carbon...) and the pipe to the boiler is in copper so it must tee off under the floor.