CH system is loosing pressure - drops from 1bar to zero over ~7days.
Sime 100c combi boiler.
So far, in no particular order;
No signs of any leaks within the boiler itself.
Replaced the PRV and had a bucket under overflow to double check PRV is holding - no leaks.
Checked the CH system drains (boiler and outside house) with a tray underneath - no leaks.
Bled CH system numerous times to get any trapped air out.
Checked every rad and all visible pipework in system for evidence of leaks (smell of damp, damp carpets, water marking etc) with no signs anywhere of any leaks.
Any suggestions as to what's next? Some of the downstairs CH pipework is under concrete floors so do not want to be having to dig them up unless as a last resort...
Am I wrong is assuming that an internal leak in the diverter valve couldn't cause the CH system to lose pressure, because the MCW and DHW are at a higher pressure than CH system so an internal leak in the diverter would pressurise the CH system rather than drain it?
Sime 100c combi boiler.
So far, in no particular order;
No signs of any leaks within the boiler itself.
Replaced the PRV and had a bucket under overflow to double check PRV is holding - no leaks.
Checked the CH system drains (boiler and outside house) with a tray underneath - no leaks.
Bled CH system numerous times to get any trapped air out.
Checked every rad and all visible pipework in system for evidence of leaks (smell of damp, damp carpets, water marking etc) with no signs anywhere of any leaks.
Any suggestions as to what's next? Some of the downstairs CH pipework is under concrete floors so do not want to be having to dig them up unless as a last resort...
Am I wrong is assuming that an internal leak in the diverter valve couldn't cause the CH system to lose pressure, because the MCW and DHW are at a higher pressure than CH system so an internal leak in the diverter would pressurise the CH system rather than drain it?
