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Series 909 - Watts

A Reduced Pressure Zone Assembly shall be installed at each cross-connection to prevent backsipho nage and backpres-sure of hazard ous mate rials into the potable water supply. The assem bly shall consist of a pressure dif fer ential relief valve located in a zone between two positive seating check valves.

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  Series, Pressure, Reduced, Series 909, Reduced pressure

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