hi i haven't checked the loop but don't think it is as the pressure only rises when the heating is on and not all of the time.
When re-charging the expansion I drained a rad until there was no pressure in the boiler i.e. gauge was reading 0 then pumped in 1 bar? is this the incorrect way if so...
Hi i have a green star 30si combi boiler have recently changed the PRV valve as was leaking due to muck and grime that's all sorted. I have pressurized the expansion vessel and boiler system back up to one bar and when using the hot water gauge typically drops for a short period then goes back...
