It looked like it from my inexperienced eye. He also connected a rubber pipe to one of the downstairs radiators to allow some of the water to come out.
The gasman tried that when he was looking at the radiators.
I'm not sure what type of system, its a combi boiler with 2 downstairs and 3 upstairs radiators.
I've had one radiator removed from the kitchen, after which the upstairs radiators remain cold. I've had a boiler service and at the same time they tried to resolve the cold radiators. They have recommended a Chemical Flush, which has been quoted at £580. I just wanted to check to see if any of...