For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AIR-GAP SEPARATION. A physical break between a supply pipe and a receiving vessel. The air- gap shall be at least double the diameter of the supply pipe measured vertically above the top rim of the vessel, in no case less than one-inch.
APPROVED BACKFLOW-PREVENTION ASSEMBLY. An assembly which has passed laboratory and field evaluation tests performed by the University of Southern California Foundation for Cross- Connection Control and Hydraulic Research.
APPROVED WATER SUPPLY. Any water supply whose potability is regulated by the State Health Department.
AUXILIARY SUPPLY. Any water supply on, or available to, the premises other than the approved water supply.
AWWA STANDARD. An official standard developed and approved by the American Water Works Association (AWWA).
BACKFLOW. A flow condition, caused by a differential in pressure, that causes the flow of water or other liquids, gases, mixtures, or substances into the distributing pipes of a potable supply of water from any source or sources other than an approved water supply source. Back siphonage is one cause of backflow. Back pressure is the other cause.
CITY. The city.
CONTAMINATION. A degradation of the quality of the potable water by any foreign substance which creates a hazard to the public health, or which may impair the usefulness or quality of the water.
CROSS-CONNECTION. Any unprotected actual or potential connection between a potable water system used to supply water for drinking purposes and any source or system containing unapproved water or a substance that is not or cannot be approved as safe, wholesome, and potable. Bypass arrangements, jumper connections, removable sections, swivel or changeover assemblies, or other assemblies through which backflow could occur shall be considered to be cross-connections.
DIRECTOR OF PUBLIC WORKS. The Director of Public Works of the city or his or her designated representative in his or her absence.
DOUBLE CHECK-VALVE ASSEMBLY. An approved assembly of two internally loaded, independently acting check valves, including resilient seated shut-off valves on each end of the assembly and test cocks for testing the watertightness of each check valve.
HEALTH AGENCY. The State Department of Health Services.
PERSON. An individual, corporation, company, association, partnership, municipality, public utility, or other public body or institution.
PREMISES. Any and all areas on a water user's property which are served or have the potential to be served by the public water system.
PUBLIC WATER SYSTEM. The city system through which is provided piped water to the public for human consumption.
RECLAIMED WATER. A wastewater which, as a result of treatment, is suitable for uses other than potable use.
REDUCED PRESSURE PRINCIPLE BACKFLOW-PREVENTION ASSEMBLY. An approved assembly incorporating two internally loaded, independently operating check valves and an automatically operating differential relief valve located between the two checks, including resilient seated shut-off valves on each end of the assembly, and equipped with necessary test cocks for testing the assembly.
SERVICE CONNECTION. The point of connection of a user's piping to the water supplier's facilities.
WATER SUPPLIER. The city, which owns and operates the approved water supply system.
WATER USER. Any person obtaining water from the approved water supply system.
('61 Code, § 5-6.02) (Ord. 541 C.S., passed 2-15-90)