Hi,
I have a single pipe loop central heating system and have issues with some radiators not getting hot at all. I have tried changing the valves, radiators, flushing the system etc and the problem must be related to the pipework and / or balancing i think. The flow pipe on the radiators is getting really hot but the water is not flowing through the radiator as the outlet pipe is cold. I have heard that on a single pipe systems the radiators must be close the main feed pipe - in my case they are about 2-3 metres off the main pipe.
I need some advice - is there anything i can try to improve the radiators other than replumbing? (there is a recently fitted wooden floor in the house so want to advoid this!).
Is it common for poeple to replace single loop systems with a feed and return system and what is the typical cost for a 5 bedroom house?
James