- 24 Oct 2006
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Hello, I have an open vented central heating system and I turned of the mains water and bled the radiators added flush cleaner to the expansion tank. I closed all the radiators and turned on the mains water but the system isnt refilling. The expansion tank is half full of water and the ball in it functions correctly. Can anybody help? The house was built by Mclean 10 years ago and the boiler is an ideal classic. what is the path of water into the central heating system? I am guessing that i am looking for a stop cock somewhere but i've tried the ones in the storage tank cupboard.