- BruceR -
A better and less wasteful way to do this would be with a Laing
Auto-Circ (http://www.autocirc.com/Autocirc.htm). It easily installs
under the sink in your bathroom and attaches to the hot and cold
lines.
When turned on it pumps water from the hot line back to the cold
side so
hot water water is always available.

- awm -
Here in the UK at least this would break the Water Bye Laws and/or
guidelines for prevention of legionaires disease.



- Nehmo -

I've seen hot water recalculating systems like this one

http://www.lainginc.com/howhot.htm

that use a small return pipe. But I never thought of simply sending the
water at the base of the hot water faucet to the cold water line, as in
this "autocirc" system. Ling provides somewhat of a comparison he

http://www.lainginc.com/facts_to_know.htm

The conventional recirculation system needs a return line separate form
the hot and cold supply lines. The "autocirc" system doesn't require a
return line but the cold water at the faucet is mixed a bit with some
hot water, so upon turn-on, it isn't really cold.



I would say if someone is planning instant hot on new construction, then
use the conventional system and run the return line. But it the job is a
retrofit, then the autocirc is the simplest.



So, BruceR, was your project new construction?



And Awm, how does (according to the "Bye Laws") something like the
autocirc system promote or create an environment for Legionnaires
Disease?











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* Nehmo Sergheyev *
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