"Brian Sharrock" wrote in message
...

If you place the hot water cylinder side-by-side - (do you mean standing
on the same platform with their bases at the same level?) - then the
hot-water cylinder will only fill to the level of the upper-surface of the
cold water tank. Water doesn't 'fall' up-hill.

Siphon?

Peter


--
Posted via a free Usenet account from http://www.teranews.com