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Mend Boiler Heating Pressure

i fill my boiler with water and it empties withen 30 mins?

i charge my boiler then it loses pressure quickly

clive
October 2012
Heating, Home Heating SystemsBoiler Heating Pressure
sounds like the expansion vessel has lost its charge., empty boiler fit a car footpump to vessel and charge it up to approx 0.75 bar job done

higgy
October 2012

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Boiler Losing Pressure & Water - Help!