What is a backflow preventer?
A backflow preventer is a testable or non-testable cross connection control device which prevents potential pollutants and contaminants from flowing into the public water system.

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1. What is backflow?
2. What is backpressure backflow?
3. What is back-siphonage?
4. What is a backflow preventer?
5. Why does a soft drink dispensing machine require backflow protection?