[hi do es the same anwser still apply as the boiler is about 10 years old, the knocking seem to come from the boiler but can be hear through the pipes around the house, thankyou for your reply
HI WE HAVE HAD A CORGE RES MAN OUT TO OUR WORSTER BOSCH COMBI GAS BOILER, TO SORT OUT KNOCKING, IN PIPES, HE HAS RUN OUT OF IDEARS OF WHAT ELSE COULD BE WRONG, WEVE HAD NEW FAN NEW PUMP, ANY IDEAS ANYONE PLEASE, HELP!!!!!!
