For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AIR-GAP. A vertical, physical separation between a water supply and the overflow rim of a non-pressurized receiving vessel. An approved AIR-GAP separation shall be at least twice the inside diameter of the water supply line, but in no case less than two inches. Where a discharge line serves as receiver, the AIR-GAP shall be at least twice the diameter of the discharge line, but not less than two inches.
ANNUALLY. Twelve months.
ATMOSPHERIC VACUUM BREAKER. A device which prevents back-siphonage by creating an atmospheric vent when there is either a negative pressure or sub-atmospheric pressure in the water system.
AUXILIARY INTAKE. Any water supply, on or available to a premises, other than that directly supplied by the public water system. These auxiliary waters may include water from another purveyor's public water system, any natural source, the as a well, spring, river, stream and so forth; used, reclaimed or recycled waters or industrial fluids.
BACKFLOW. The undesirable reversal of the intended direction of flow in a potable water distribution system as a result of a cross connection.
BACKPRESSURE. Any elevation of pressure in the downstream piping system (caused by pump, elevated tank or piping, stream and/or air pressure) above the water supply pressure at the point which would cause, or tend to cause, a reversal of the normal direction of flow.
BACK-SIPHONAGE. The flow of water or other liquids, mixtures or substances into the potable water system from any other source other than its intended source, caused by the reduction of pressure in the potable water system.
BYPASS. Any system of piping or other arrangement whereby water from the public water system can be diverted around a backflow prevention devise.
CONTAMINANT. Any substance introduced into the public water system that will cause illness or death.
CONTAMINATION. The introduction or admission of any foreign substances that causes illness or death.
CROSS CONNECTION. Any physical connection or potential connection whereby the public water system is connected, directly or indirectly, with any other water supply system, sewer, drain, conduit, pool, storage reservoir, plumbing fixture or other waste or liquid of unknown or unsafe quality, which may be capable of imparting contamination to the public water system as a result of backflow or back-siphonage. Bypass arrangements, jumper connections, removable sections, swivel or changeover devices, through which or because of which backflow could occur, are considered to be CROSS CONNECTIONS.
DOUBLE CHECK DETECTOR ASSEMBLY. An assembly of two independently operating, approved check valves with an approved water meter (protected by another double check valve assembly) connected across the check valves, with tightly closing resilient seated shut-off valves on each side of the check valves, fitted with properly located resilient seated test cocks for testing each part of the assembly.
DOUBLE CHECK VALVE ASSEMBLY. An assembly of two independently operating, approved check valves with tightly closing resilient sealed shut-off valves on each side of the check valves, fitted with properly located resilient sealed test cocks for testing each check valve.
FAILED. The status of a backflow prevention assembly determined by a performance evaluation based on the failure to meet all minimums set forth by the approved testing procedure.
FIRE PROTECTION SYSTEMS. Classified in six different classes in accordance with AWWA Manual M14 - Second Edition 1990. The six classes are as follows.
(1) CLASS 1 shall be those with direct connections from public water mains only - no pumps, tanks or reservoirs; no physical connection from other water supplies; no antifreeze or other additives of any kind; all sprinkler drains discharging to the atmosphere, dry wells or other safe outlets.
(2) CLASS 2 shall be the same as Class 1; except that, booster pumps may be installed in the connections from the street mains.
(3) CLASS 3 shall be those with direct connections from public water supply mains, plus one or more of the following: elevated storage tanks, fire pumps taking suction from above ground covered reservoirs or tanks, and/or pressure tanks (all storage facilities are filled from or connected to public water only and the water in the tanks is to be maintained in a potable condition).
(4) CLASS 4 shall be those with direct connection from the public water supply mains, similar to Class 1 and Class 2 with an auxiliary water supply dedicated to Fire Department use and available to the premises, such as an auxiliary supply located within 1,700 feet of the pumper connection.
(5) CLASS 5 shall be those directly supplied from public water mains and interconnected with auxiliary supplies, such as pumps taking suction from reservoirs exposed to contamination, or rivers and pond; driven wells, mills or other industrial water systems, or where antifreeze or other additives are used.
(6) CLASS 6 shall be those with combined industrial and fire protection systems supplied from the public water mains only, with or without gravity storage or pump suction tanks.
HAZARD, HEALTH. A cross connection or potential cross connection involving any substance that could, if introduced in the public water supply, caused death, illness and spread disease also known as a HIGH HAZARD.
HAZARD, NON-HEALTH. A cross connection or potential cross connection involving any substance that would not be a health hazard, but would constitute a nuisance or be aesthetically objectionable if introduced into the public water supply also known as LOW HAZARD.
INTERCONNECTION. Any system of piping or other arrangements whereby the public water supply is connected directly with a sewer, drain, conduit, pool, storage reservoir or other device which does or may contain sewage or other waste or liquid which would be capable of imparting contamination to the public water system.
MANAGER. The Manager of the Water Department or his or her duly authorized deputy, agent or representative.
PASSED. The status of a backflow prevention assembly determined by a performance evaluation in which the assembly meets all minimums set forth by the approved testing procedure.
PERFORMANCE EVALUATION. An evaluation of an approved double check valve assembly or reduced pressure principle assembly (including approved detector assemblies) using the latest approved testing procedures in determining the status of the assembly.
PERSON. Any and all persons, natural or artificial, including any individual, firm or association, and any municipal or private corporation organized or existing under the laws of this or any other state or country.
POLLUTANT. A substance in the public water system that would constitute a non-health hazard and would be aesthetically objectionable if introduced into the public water supply.
POTABLE WATER. Water, which meets the criteria of the State Department of Environment and Conservation and the United States Environmental Protection Agency for human consumption.
PRESSURE VACUUM BREAKER. An assembly consisting of a device containing one or two independently operating spring loaded check valves and an independently operating spring loaded air inlet valve located on the discharge side of the check valve(s), with tightly closing shut-off valves on each side of the check valves and properly located test cocks for the testing of the check valves and relief valve.
PUBLIC WATER SUPPLY. The water system, which furnishes potable water to the public for general use and which is recognized as the public water supply by the State Department of Environment and Conservation.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION DEVICE. Any assembly consisting of two independently operating approved check valves with an automatically operating differential relief valve located between the two check valves, tightly closing resilient seated shut-off valves, plus properly located resilient seated test cocks for the testing of the check valves and the relief valves.
SERVICE CONNECTION. The point of delivery to the customer's water system; the terminal end of a service connection from the public water system where the Water Department loses jurisdiction and control over the water. SERVICE CONNECTION shall include connections to fire hydrants and all other temporary or emergency water service connections made to the public water system.
SURVEY. An evaluation of a premise by a water system performed for the determination of actual or potential cross connection hazards and the appropriate backflow prevention needed.
WATER SYSTEM. Made up of two parts, the utility system (which shall include the City Water Department, Catoosa Water Department, and any other water departments that may in the future, by merger or otherwise, become a part of the city) and the customer system.
(1) The utility system shall consist of the facilities for the storage and distribution of water and shall include all those facilities of the water system under the complete control of the utility system, up to the point where the customer's system begins (i.e., the water meter).
(2) The customer system shall include those parts of the facilities beyond the termination of the utility system distribution system that are utilized in conveying domestic water to points of use.
(Ord. 1297, passed 4-12-2011)