Is a pressure drop on my new combi boiler due to a leak? It will go from the
high end on the pressure gauge green section to the low end in about a
week/week and a half.
I have a fancy heated towel rail that, through it's design. can never be
totally air free and is a nightmare to bleed even with two auto bleed
valves. Can this be the culprit? or is it, as I suspect, always a leak? No
sign of water anywhere so it must very small.