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In response to another topic i started someone wrote that the cold feed FROM the expansion tank to the CH system should not be closed. I have just got my system up and running again after draining it completely, and during this time i found the tap on the feed from the expansion tank was...

Help! I have removed one rad downstairs and connected the pipes in a U bend, thinking the flow would just continue on with no rad there. Obviously there are no valves now so some of the system was drained down. Now i have no heat. The pump works as does the boiler, and i have hot water. There...