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(1) Minimum requirements for the testing of all backflow assemblies shall be in accordance with the USC/FCCCHR Manual of Cross-Connection Control, tenth edition, published October 2009, including subsequent revisions, adopted by reference herein.

(2) Backflow assemblies shall be installed in meter boxes, vaults, or “hot boxes” if greater than two-inch diameter unless otherwise approved by the district. Vaults shall have adequate clearances and depths to allow for inspection and testing. Assemblies that cannot be easily and readily inspected shall be relocated and replumbed as directed by the district. The owner shall contact the district for applicable installation requirements and standards.

(3) All bypass lines parallel to a line on which an approved backflow assembly is installed shall have an approved backflow assembly installed that offers the same level of protection as the assembly required by the district on the main line. [Res. 735 § 1, 2017.]