Then the main stop cock would not have helped for some time, the entire hot water header tank in the loft would have to drain down through the hot cylinder before the leak stopped. What would have helped is the airing cupboard usually has a valve to stop the header tank supplying the hot cylinder. And you really ought to get your stop cock fixed. Or at least find where the one in the road is for your house, though that may also have seized.
Longer than the seals in the isolator valves. I generally find by the time anything fails the isolator valves are useless and either won't turn or spray water out of the gland.
Are you sure? I presume you have a combi boiler, hence the gas usage on-demand, so the water is at mains cold-water pressure, as opposed to the lower pressure you would get with a header tank system.
It could have used gas once the hot cylinder temperature dropped and needed to be brought back up to temperature. But that would have required the hot water to be timed to be on in the afternoon, which is often not the case with a hot cylinder since there is an assumption it will last until early evening.
Now that you mention it, I'm not so sure.
No cylinder here. Much preferred a cylinder and insisted on one at my old house.
If there's no cylinder then you almost certainly have a combi boiler with mains pressure hot water.
Great, guess that's messed up the smart meter. It doesn't appear to be sending the half-hourly data. Oddly enough data has been sent (after the event) for the usage during the power cut. Latest data available 1am (GMT) on Sunday, then - nothing. I can see some fun coming when, if it doesn't recover by the proper meter reading dates (25th/28th), I have to complain to Gritish Bass that the meter's stopped working.National Grid said:
Well, I guess if the meter has stopped working you pay nothing ...
Either they'll estimate the bill or ask me to read it. (I'm likely to be pro-active and read it anyway- just in case). The meters are still showing the values - it just looks as though the values are not being uploaded. Oddly, I've got an electricity "export" reading of 0.3kWh although I have no form of generation connected to the system.Well, I guess if the meter has stopped working you pay nothing ...