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Backflow Final Exam Questions and Answers | Latest Updated 2023/2024 (GRADED)
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Backflow Final Exam Questions and Answers | Latest Updated 2023/2024 (GRADED). An approved airgap (AG) is a physical separation between the free-flowing end of a: D. Potable water supply pipe line in the overflow rim of an open or non-pressurized receiving vessel 3) And indirect cross-connection...
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