G
Grahamwilliam
Hopefully some of the experts can give me badly needed advice. Over past year my combi system has been losing pressure from 1.5bar to 0.25bar every 3 days. Therefore i have been re pressuring the system to 1.5 bar every 3 days. I have never been able to find any leaks or weeping of joints on any radiator or connections under the floor. PRV valve seems to be ok as well. So i called the plumber and he suggested replacing the expansion unit which we did, and now it is fitted the system pressure only lasts 1 days now before i have to re pressure up to 1.5 bar from 0.25 bar. the new expansion units seems to have made it worse and plumber believes the old expansion unit bladder was punctured. i have checked all rads, underfloor and boiler again and can find no leaks or weeping, help, please any ideas anyone?