On my current c/h system i have 2 x 22mm copper pipes running from the boiler to supply the radiators, flow and return i presume. Each radiator throughout the house has a 15mm branch off these 22mm pipes to feed the rads. I intend to add an additional rad to the system which is very close to an existing rad. My question is can i tee off from the 15mm pipes running to this rad to feed the new one, or do i have to tee off from the main 22mm pipe like the rest off the rads.
Thanks in advance for any help
Thanks in advance for any help