> On the Continent of Europe it's apparently quite common to 
> have the hot water pipes in a circuit from the hot tank, 
> around all the taps and back to 
> the tank, with a pump to move the hot water around so that it 
> comes out of the taps hot almost instantly. 

That's more or less how a CV works, but I have never seen this for tap
water.

Wouter van Ooijen

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