my boiler is constantly lossing pressure when cold, hot water & central heating are both working fine, i keep topping up via the filling loop to 1.0 bar but when the system is not being used the pressure drops to 0.5 or below , i have checked for leaks, puzzling thing is where is the extra water going ?
i was told that it could be the diaphagm needs re-pressurising using a footpump, what would i need to do if this is the case ?
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