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  1. F

    Pressure drop in Biasi combi boiler

    I'll get that fixed then. Thankyou so much all
  2. F

    Pressure drop in Biasi combi boiler

    Hmmm I stand corrected, not a few drops - 350mls over 24hrs. The CH was on for the last 3 of those hours. All this water was discharged during the time the CH was on. The pressure unsurprisingly is now back at zero.
  3. F

    Pressure drop in Biasi combi boiler

    yes I can feel some water discharge at the PRV but not much - a few drops really
  4. F

    Pressure drop in Biasi combi boiler

    Pressure rises quickly to about 2.6 - I've not seen it go over 3. Will look into re-pressurising expansion vessel. Thanks
  5. F

    Pressure drop in Biasi combi boiler

    Hi Sorry another query about pressure drop in a combi boiler. The boiler is a Biasi 28S combi. The pressure will drop only after the central heating has been on but if I re-fill and leave the heating off, the pressure does not fall. Incidentally even if the pressure has dropped right down...
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