David Hansen wrote:
On Wed, 23 Nov 2005 12:13:59 -0000 someone who may be "Doctor
Drivel" wrote this:-

You can't drink the water from a tank,

Really.

Using the hot water of mains pressure systems when filling kettles reduces
expensive electricity consumption.

As does filling the kettle from a hot water cylinder.

Neither of which actually give you hot water unless you've just been
running it for something else. Otherwise all you do is draw off a slug
of previously heated but now cold water from the pipe to be replaced by
hot water which will then go cold in the pipe.

MBQ