Tim Watts wrote:

lister
wibbled on Tuesday 10 August 2010 22:29

Couldn't work out which one stopped the hot, so turned em all off, and
ran a lot of hot taps until they slowed to a stop. All hunkey dorey.

Assuming a vented system:

The gate valve will *probably* have either stopped the cold tank filling
(and thus indirectly the hot tank) or it cut the feed from the cold to the
hot tank.

So, it sounds as if some air managed to get in and defeat the partiation
vacuum that was otherwise stopping the water coming out.

Which is perhaps just as well, since you could otherwise have
collapsed your hot tank!

Chris
--
Chris J Dixon Nottingham UK


Have dancing shoes, will ceilidh.