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My recently installed central heating system - is making a few clips/taps/knocks when heating up. I know it can be normal as we have copper pipes / wood floors etc. If some of the pipes under the floor boards are movable (ie u can flex some VERY easily side to side) and there are no clips...

I am just having a Worchester 40E combi installed. At the moment I have two questions before the work is complete and I pay the installers. 1) The pump is still circulating the central heating water when the 'flame is off' and the system has reached it's required temperature - this normal...