On 02/01/2013 17:24, Brian Gaff wrote:
I was just thinking that. Actually, surprised nobody has invented a mains
cold powered pump that will transfer extra pressure to the hot so although
it would not be as fast as the mains, it would be faster than the gravity
method.

OK should I rush out and patent it now do you think?

Brian

Google "Venturi Shower"

SteveW