feed & expansion

Last autumn, I cleaned out the central heating system (old back boiler with F&E) with X400, and dosed with X100. It hadn't been touched for a good few years prior to that. A few months later, I find this gunge in the tank (stringy/white stuff) which Google tells me is probably bacterial and...

hi there, i am new to this forum and can someone please help me with an issue i am facing with my CH system? basically, i cleaned the system with X800 and left it in for a week after we had our radiators replaced with new ones about 2 months ago. i then refilled and drained the system three...