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At long last, I have gotten round to balancing the CH system and hey presto! the radiator is roasting! It also seems to have made the whole system more efficient as I have had to turn the house thermostat down as the house was getting too hot, even with adjusting the radiator thermostat. It...

Good point, though when I drain the central heating system using either tap, I get around 2 and a half buckets of water (I have fitted an inline valve to isolate the header tank, which saves time when draining the system and also saves messing with wood and bungees in the loft), which leads me...

John506, the problem that I have is that the pipework on the ground floor is buried in the concrete floor, which makes tracing the pipework quite difficult. My cats have found the main flow and return pipes, but seem reluctant to help find the lesser pipes!

Thanks. The long hose is a good idea and should allow me to work out the direction of flow.

I have a conventional central heating system (condensing boiler, header tank, hot water tank & immersion). I have carried out a number of tasks on the system over the years: changing radiators, installing a new airing cupboard and new hot water tank, and I am fairly happy with my domestic...