I have been told that my system needs to be flushed out, i have drained the system down and tried to add a cleaning solution to a radiator (downstairs) via the bleed screw (very very small hole) but it does not want to take it in.
Also i have two tanks in my loft a large cold water one and next to it a small one with hot water in it, can i add the cleaning solution to the small tank?? when drained off a again can i then add inhibitor to the same tank??
Please help!!