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boiler ferroli optimax?

so how do i ensure there is no pressure in the system prior to trying the pump thing which hopefully will prevent the pressure going to 3 to 3 and a half bar!!!

pete
March 2011
FerroliFerroli OptimaxHeating, Home Heating SystemsBoiler Ferroli Optimax
if the pressure goes up very very quickly even with the tap only slightly open and it loses pressure as quick you have a problem with either a blocked pipe to the pressure vessel or the vessel needs recharging or replacing

brian
March 2011

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