On Sun, 03 Dec 2006 16:28:20 +0000 someone who may be Dave Fawthrop
wrote this:-

You should not use any water from an attic tank for cooking or drinking,
because the problem of sludge in attic tanks which you observed is common
in UK houses.

And the sludge is thus not in the water one is drinking.

Hot water from a combi is OK for cooking and drinking, because it has not
been stored. I have had this from an Environmental Health Officer.

I wouldn't pay too much attention to council officials on the
subject. There are ways of making water in a storage tank unsuitable
to drink, but if the tank is installed and maintained properly there
is very little risk drinking water from such a tank. The water that
comes in the mains is more dangerous, as the residents of several
places including Camelford would attest.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54