The customer must comply with state and federal laws governing the separation of dual water systems or installations of backflow protective devices to protect the public water supply from the danger of cross-connections. Backflow protective devices must be installed as near the service as possible and shall be open to test and inspection by the public works department. Plans for installation of backflow protective devices must be approved by the public works department prior to installation. [Ord. 910 Art. 7, § 7, 2016; Ord. 878 Art. 7, § 7, 2015.]