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Originally Posted by nickpecoraro
About 25 years ago, I read an article in a magazine about a Gray water system. The wastewater from the shower and bathroom sinks would be stored in a tank outside or in the basement or roof. This water would then be recycled to flush the toilet. The article said it would be cheap to install in new houses and older houses could be refitted for a low price. But it would reduce water usage at least 40%.
It seems nothing has ever been done to implement such a system.
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Grey water systems are used in most developed countries, although installations are still rare. They are not cheap ways of saving water, in fact they are generally one of the more expensive options, which is why they are not that popular. They are also high maintenance and energy intensive.