I have to fit a DHW flowstat or water throttle head assy as they are called in the manual (britony combi 80 boiler), This may be a stupid question can i just shut the mains supply and run the taps or do i shut the mains and drain from the drain tap, i presume i don't need to drain the central heating circuit do i?
Once i have replaced the part is there any procedure on refilling the system?
Cheers
Lee
Once i have replaced the part is there any procedure on refilling the system?
Cheers
Lee