Thanks for the reply S All valves are fully open so I might replace the reducing valve with one which is fitted with a gauge, at least that way I'll know if the tank is at the correct pressure.
I have a unvented hot water system & when the hot water is turned on the pressure is as good as it was before a new expansion vessel was fitted, however after 5 > 10 seconds it drops to a level which is Ok but not brilliant. The expansion vessel pressure is set at 2.1 bar (as was the old one) wh...
