Hi all, my boiler started to leak water very badly this morning and have found the culprit but i dont know what its called. the part is a silver ball with a tyre valve on it which screws into the water inlet to the boiler. it has no wires to it. thanx jim.
Yes it is a expansion vessel thank you. found out by searching the web, now i need to know if it has to be boiler specific or will any one fit with the same rating as i have no hot water and two grubby kids lol.
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