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When we turn all the others off we have a horiific amount of banging in the pipes which then causes the boiler to trip out....this is just repeated each time we try... What a nightmare!

And then what???? :D

]I have an airlock in my microbore central heating pipe which feeds the two radiators in my lounge. We have no bleed off valves in the pipe which runs in the cellar to feed the two rads. Both rads have hot feed pipe but the return is cold. Can I perform a backflush if I remove one of...