To comply with the regulations of the California State Department of Public Health and the drinking water standards of the United States Public Health Service, which prohibit unprotected cross-connections between the public water supply and any approved source of water, the Utility Department shall require the installation of a backflow, reduced pressure and/or air gap device approved by the state of California, Department of Health Services under any of the following conditions. Installation will be done by and at the expense of the customer before service will be granted.
(A) Where the premises are or may be engaged in industrial processes using or producing process waters or liquid industrial wastes, or where the premises are or may be engaged in handling sewage or any other dangerous substances;
(B) Where the circumstances are such that there is special danger of backflow of sewage or other contaminated liquids through plumbing fixtures, equipment using or treating water, or storage tanks and reservoirs;
(C) Where pipes are installed for private fire protection.
(`83 Code, § 13.04.300) (Ord. 80-16 (part), 1980; Ord. 82-21 (part), 1982; Ord. 88-20 § 2, 1988)