For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
APPROVED BACKFLOW PREVENTION DEVICE. A device to counteract back pressures or prevent back siphonage. This device must appear on the list of approved devices issued by the state’s Health Division.
AUXILIARY SUPPLY. Any water source or system other than the public water system that may be available in the building or on the premises.
BACKFLOW. The flow in the direction opposite to the normal flow or the introduction of any foreign liquids, gases or substances into the water system of the city’s water.
CONTAMINATION. The entry into or presence in a public water supply system of any substance which may be deleterious to health and/or quality of the water.
CROSS-CONNECTION. Any physical arrangement where a public water system is connected, directly or indirectly, with any other non-drinkable water system or auxiliary system, sewer, drain conduit, swimming pool, storage reservoir, plumbing fixture, swamp coolers or any other device which contains, or may contain, contaminated water, sewage or other liquid of unknown or unsafe quality which may be capable of imparting contamination to the public water system as a result of backflow. Bypass arrangements, jumper connections, removable sections, swivel or change over devices or other temporary or permanent devices through which, or because of which, backflow may occur are considered to be CROSS-CONNECTIONS.
DEGREE OF HAZARD. Derived from the evaluation of a health, system, plumbing or pollution hazard.
DOUBLE CHECK VALVE ASSEMBLY. An assembly of two independently acting check valves with shut-off valves on each side of the check valves and test cocks for checking the water-tightness of each check valve.
DIVISION. The Health Division of the state’s Department of Human Resources.
HEALTH HAZARD. An actual or potential threat of contamination of a physical or toxic nature to the public potable water system or the consumer’s potable water system that would be a danger to health.
PLUMBING HAZARD. An internal or plumbing-type cross-connection in a consumer’s potable water system that may be either a pollutional or a contamination-type hazard. This includes, but is not limited to, cross-connections to toilets, sinks, lavatories, wash trays, domestic washing machines and lawn sprinkling systems. Plumbing-type cross-connections can be located in many types of structures including homes, apartment houses, hotels and commercial or industrial establishments.
POLLUTIONAL HAZARD. An actual or potential threat to the physical properties of the water system or the potability of the public or the consumer’s potable system but which would not constitute a health or system hazard, as defined. The maximum degree of intensity of pollution to which the potable water system could be degraded under this definition would cause a nuisance or be aesthetically objectionable or could cause minor damage to the system or its appurtenances.
POTABLE WATER SUPPLY. Any system of water supply intended or used for human consumption or other domestic use.
PREMISES. Any piece of land to which water is provided including all improvements, mobile homes(s) and structures located on it.
REDUCED PRESSURE PRINCIPLE DEVICE. An assembly containing two independently acting approved check valves together with a hydraulically-operated, mechanically-independent pressure differential relief valve located between the check valves and at the same time below the first check valve. The device shall include properly located test cocks and tightly closing shut-off valves at the end of the assembly. A check valve is approved if it appears on the list of approved devices issued by the state’s Health Division.
SYSTEM HAZARD. An actual or potential threat of severe danger to the physical properties of the public or consumer’s potable water system or of a pollution or contamination which would have a detrimental effect on the quality of the potable water in the system.
(Ord. 96-02, passed 2-6-1996)