Yes the pressure drops over a couple of hours without the heating being switched on. The floor is laminated wood layed over a concrete floor with material between.
As per the above posts I fill it to 1.5 which I thought might be incorrect but in a matter of a few hours the pressure drops to zero. No leaks apparent from the upstairs rads, no overflow activity so currently investigating ground floor piping to see if there is a leak. Some of this pipework...
Is it possible to close down the rad circuit after topping up the boiler by closing the two valves at the flow and return at the boiler? I am not sure if this would eliminate the rad circuit as the possible source of the leakage.
Many thanks for your reply.
I dont think there is any leak in the vicinity of the boiler as the area around the boiler is as dry as a bone and the boiler now has been topped up several times. When the EXV was changed I dont know what setting was applied. At this stage given the age of the...
I have a Glowworm Swift Flow 80 Fanned Flue Combi Boiler. Recently I have had the Expansion Vessel changed and as water was still coming out of the overflow a new pressure valve and pressure gauge were fitted which cured the overflow problem. However the pressure reading of 1.5 drops to zero in...