10.1       Backflow Preventers

All Compartment Sinks, Mop, and Service Sinks installed shall be equipped with backflow preventers in accordance with the following requirements:

A.      Backflow preventers shall be installed on cold and hot water lines that serve sinks.

B.      Backflow preventers shall be double check valve type, equal to Watts, Model 9D.

C.      Backflow preventers shall be equipped with integral strainer, ball shut off valves, and drain connection.

D.      Backflow preventers shall be all bronze construction with stainless steel internal parts.