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Mend Biasi 24S Boiler Central Heating Water Loss

biasi 24s loses water?

hi, my biasi 24s, set at 1bar pressure,loses water through the outlet pipe on c.h. the pressure rises to nearly 4bar, then when i stop the c.h. it will drop down to 0bar, but i can still get c.h & d.h.w.
any ideas please.

den
January 2012
change pressure relief valve, also pressure vessel need pump see value on vessel,to do this need to drain out system

ltd
January 2012

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