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You can here something happening once the bolier flame goes out or you switch the heating off. I will check tonight when i get home. What does this do anyway? Thanks for the advice Dale :)

The following is taken from the manual, it is the only referecne i can see to the pump running after the burner goes off, as far as i can tell it does work correctly. Why do plumbers install pipes etc without lagging them....Surely this would prevent the rubbing/banging and solve half the...

The make is an Alpha CB24, been told a pretty cheap boiler but works ok. The banging is all the time now. What else do you need to know. Thebears

:( I have a combination system and when the heating comes on first thing a load banging is heard behind the plasterboard walls between the radiators (as if where the pipe runs). The noise is getting louder, it then stops for a short while then will start again (presumably when the...