the cold water inlet to the boiler one of the joints is seeping do I have drain the whole heating system to disconect this pipe to repair it I have been told I need to empty the loop, what and where is the loop?
turn off boiler turn off mains water stopcock disconnect filling if connected (braided flexi pipe under boiler with isolation valves on) turn on hot tap in kitchen undo pipe there will be a bit of water but not much
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