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Green Plumbing

Category - Water-Efficient Technology

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Each of the following is a method for reusing graywater for toilet-flushing, except:

Bucket of graywater into toilet tank
Gutter diverter through exterior wall into toilet tank
Shower/tub drain diverter to toilet
Toilet lid retrofit into sink

Explanation

Answer: B - Gutters collect rainwater, not graywater. Dumping a bucket of graywater directly into the toilet tank is the simplest “low-tech” means of reuse for flushing. A shower/tub drain diverter redirects water from the sewer or septic system into the toilet tank. Sink retrofits allow graywater drainage directly from activities such as handwashing into the toilet tank for reuse.

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