I have an old Glowworm combi gas boiler. When I use the hot tap in the upstair bathroom, I loose water from my central heating system.
I have filled up the system with water up to 1.5 bar. I then bleed the rads and re-pressurise the system to 1.5 bar again. This seem to be fine, but as soon as I use the bathroom hot water tap on the sink (not noticed it with the bath) I hear the rads bubbling as water is drained from them.
I have googled this problem but cant find answers anywhere. All help is very much appreciated.
Gary.
I have filled up the system with water up to 1.5 bar. I then bleed the rads and re-pressurise the system to 1.5 bar again. This seem to be fine, but as soon as I use the bathroom hot water tap on the sink (not noticed it with the bath) I hear the rads bubbling as water is drained from them.
I have googled this problem but cant find answers anywhere. All help is very much appreciated.
Gary.