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I recently drained my system by opening up one of the drain cocks downstairs, then repressurised my expansion vessel to just over 1 bar and then refilled the system up to 1 bar using the filling loop. I then bled the rads and topped back up to 1 bar again. It generally works fine now except...

My Potterton Combi 80 boiler loses pressure quickly and I expect the reason for this is that water is currently constantly dripping out of the pressure relief pipe. Reading numerous posts on this forum I reach the conclusion that my Pressure Relief Valve needs replacing. This has been happening...