How do I get an air lock out of my heating system?
I've just drained my system to fit a new radiator. Water has stopped coming out of the drain valve but the header tank is still full. I opened all the air valves on the radiators and nothing is coming out of any of them so I am assuming that the radiators are empty.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.