Recent content by PJAAAAG

Thank you ianmcd and dilalio for your suggestions. No PRV discharge apparent and expansion vessel seems sounds so it is still a mystery. "Progress" of sorts however, I now need to top up/re-pressurise the system every day so it appears that it is definitely a leak in pipework! Regards

I have a C/H and HW sealed system with a system boiler (i.e. expansion vessel not header tank). Everything, boiler (Glow Worm Ultracom HXi 30kW), expansion vessel, zone valves, water cylinder etc is in the attic. The number and size of rads seem within the range of the boiler output. A diagram...