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Green Plumbing

Category - Water-Efficient Technology

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Each of the following is a potential source of cross connection and/or backflow between the public water supply and potentially contaminated/polluted water, except:

Plumbing reroutes
Toilet tanks
Hose bibs
Extended faucets

Explanation

Answer: B - Toilet tanks are not candidates for cross connection or backflow that could introduce polluted/contaminated water into the public water supply in the tank. For the other three (and others not listed, such as swimming pools and boilers), numerous backflow prevention devices exist to prevent the nonpotable water from entering the potable water supply.

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