Hello I have had the above comi boiler for the past two years. Over the last five months the pressure keeps dropping so we have to manually increase the pressure to top up every other day There appears to be no leaks.However this morning if you increase the pressure to around 2 units it will drop to zero within 15mins. Any help or advice would be greatly appreciated.

mike jackson, February 2008

check the blow off pipe outside if it drips replace the prv(pressure releif valve)if it still drips its the pressure vessel

peter, February 2008