Just had a new combi boiler fitted. When the hot (bath) tap is turned on slighty, the pipes start banging REALLY loudly and it seems the only cure is to open the tap more....not great if you don't want full pressure from the mixer head/ Is this normal/curable?
Make sure all the pipes are well clipped and lagged to prevent movement.
You possibly went from a gravity fed system to a mains fed with a higher flow/presure rate causing the pipes to move.
Pete
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