Blackwater versus Graywater

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    Grace Choi

    Per MEEB, dishwashers and kitchen sinks are considered "Dark graywater".

    It is usually prohibited for reuse.

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    Robert Morgan

    Carie, in Building Const Illustrated 11.28 there's a diagram, it states "Soil Stack Carries discharge from water closets or urinals" and "Waste Stack carries discharge from plumbing fixtures other than water closets or urinals."

    I read that as only toilet/urinals being black water may not to be reused. All others may or maynot be reused, depending on local regulations.

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    Mitulkumar Patel

    rule of thumb: if the water contains anything that comes out of you (toilet, urinals, kitchen sink, dishwasher, etc.) its black water; if it's used for cleaning (lavatory, washing machine, shower, etc.) its gray water.

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