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Cut down on your water bill by harvesting rain water to flush your toilet.
Besides the more important environmental issues, most of us in urban areas pay for domestic potable water. I have calculated that each flush of the rainwater toilet (1.6 gallons) saves me just over 1 cent. Costing less than $100 to install, this system will pay for itself over the years.
Also, I have the satisfaction of a small level of self-sufficiency from an urban lifestyle otherwise dependant on society for survival.
Sounds good to me, especially in areas with high precipitation, and even in isolated areas.
