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  • I've just had a catastrophic (4x usual) water bill...

    I can see the meter turning when there's nothing in the house that should be using water - no taps, heating off.

    I've checked that the leak (if there is one) is definitely after the stopcock by turning it off and seeing the meter stop turning.

    I think I can hear water flowing through pipes near the boiler - is it plausible that the boiler would be drinking water even without the heating on? It's not been serviced for a few years to be honest.

  • If it was you'd think there would be some other symptoms. Where would the water be going? The heating loop is closed, unless you had an open pressure valve and the inlet open, you wouldn't be able to heat radiators and there would be an overflow running constantly.

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