Drought has made reusing 'gray' water an increasingly popular, and … - Press-Enterprise

Drought has made reusing 'gray' water an increasingly popular, and
Press-Enterprise, CA
But the state plumbing code, one of the most restrictive in the country, doesn't make it easy, Bilson said. Among the more difficult requirements: Gray water irrigation pipes must be buried 9 inches deep, and no surface runoff is allowed.

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