On Thu, Apr 7, 2011 at 3:50 PM, Carl Denk <cdenk@windstream.net> wrote:
> In the USA, that likely would require a backflow preventer of some type
> by the EPA via your local water supplier. There are some rather stiff
> fines for non-compliance I believe. There is then an annual inspection
> required that costs ~$60. I have an 8000 gallon cistern (tank) and
> collect all roof rain water. We use the water for washing, bathing. At
> the kitchen sink there is a separate faucet for the city water for
> potable purposes. The remainder of the house can be either roof or city
> water with a switchover that is impossible to cross connect, and yet a
> reduced pressure backflow preventer is required.
>


I'm not actually using the water for anything other than it's waste
heat. It only goes down the drain.

I've lived in a few houses that were designed with cisterns in the
basement. It always seemed like a logical idea, but they were always
empty and converted to dry storage space.
--=20
Martin K.
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.