For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AIR GAP SEPARATION. The unobstructed vertical distance through the free atmosphere between the lowest opening of any pipe or faucet supplying water to a tank, plumbing fixture, or other device and the flood level rim of the receptacle. An approved air gap shall be at least double the diameter of the supply pipe, measured vertically, above the top of the rim of the receptacle and, in no case less than one inch.
ATMOSPHERIC VACUUM BREAKER. A device which restricts the backflow of water into a potable water system by a simple check valve. The vacuum is broken by allowing air to enter upstream of the check valve.
APPROVED BACKFLOW PREVENTION DEVICE. A backflow prevention device that has been manufactured in full conformance of standards established by the American Water Works Association and by the American Society of Sanitary Engineers, and tested by the Foundation for Cross Connection Control and Hydraulic Research, University of California Los Angeles, California.
AUXILIARY WATER SYSTEM. Any water supply system available to the premises other than the public water supply system and includes the water supplied by such system. These AUXILIARY WATER SYSTEMS may include water from another consumer’s public water supply system; polluted or contaminated water, process fluids; used water; or other sources of water which the consumer of the public water supply system does not have sanitary control.
BACKFLOW. The flow of water or other liquids, mixtures, or substances into the water distribution system from any other source than the intended source of the potable water supply.
BACKFLOW PREVENTION DEVICE. Any device, method or type of construction intended to prevent backflow into a potable water system.
CONSUMER. The owner or person in control of any premises supplied by or in any manner connected to a public water supply system.
CONSUMER’S WATER SUPPLY SYSTEM. Any water supply system, located on the consumer’s premises, supplied by or in any manner connected to a public water supply system. A household plumbing system is considered to be a CONSUMER’S WATER SUPPLY SYSTEM. A fire suppression system is also considered a CONSUMER’S WATER SUPPLY SYSTEM.
CONTAMINATION. An impairment of the quality of the water by sewage, or waste to a degree which could cause an actual hazard to the public health through poisoning or through spread of disease by exposure.
CROSS-CONNECTION. Any arrangement whereby contamination due to backflow or back-siphonage can occur.
DEGREE OF HAZARD. A term derived from an evaluation of the potential risk to health and the adverse effects upon the potable water system.
DOUBLE CHECK VALVE ASSEMBLY. An assembly composed of two single, independently acting, check valves including 100% closing shutoff ball valves or resilient seat gate valves located at each end of the assembly and suitable connections for testing the water-tightness of each check valve.
HEALTH HAZARD. Any condition, device, or practice in a water system or its operation that creates a real or potential danger to the health and well-being of the consumer.
LICENSED PLUMBER. A person which has obtained the appropriate license from the city.
PLUMBING HAZARD. A plumbing type cross-connection in a consumer’s potable water system that has not been properly protected by air-gap separation or backflow prevention devices.
POLLUTION. The presence in water of any foreign substance (organic, inorganic, or biological) that degrades the quality of water to a degree which does not necessarily cause an actual hazard to the public health but which does adversely and unreasonably affect such waters for any desired use.
POLLUTION HAZARD. A condition through which an aesthetically objectionable or degrading material not dangerous to health may enter the public water supply system or the consumer’s water supply system.
POTABLE WATER. Water which is satisfactory for drinking, culinary, and domestic purposes and meets the requirements of the State Department of Health and Human Services Regulation and Licensure.
PUBLIC WATER SUPPLY SYSTEM. A water supply system designed and intended to provide potable water to designated customers. The water supply shall include the water supply source and distribution piping network.
(1) The WATER SUPPLY SOURCE is defined as any artificial or natural accumulation of water used to supply the potable water system.
(2) The DISTRIBUTION PIPING NETWORK includes all piping, plumbing, pumping and treatment devices used to convey an adequate quality and quantity of potable water to the consumers property line where a curb stop is normally located.
REDUCED PRESSURE ZONE BACKFLOW PREVENTION DEVICE. A device containing a minimum of two independently acting check valves together with an automatically operated pressure differential relief valve located between two check valves. During normal flow and at the cessation of normal flow, the pressure between these two checks shall be less than the supply pressure. In case of leakage of either check valve, the differential relief valve, by discharging to the check valves at less than the supply pressure. The unit must include 100% closing shutoff ball valves or resilient seat gate valves located at each end of the device, and each device shall be fitted with properly located test cocks.
SERVICE CONNECTION. The end of the public water system. The service connection is the property line.
SYSTEM HAZARD. A condition posing an actual or potential threat of damage to the physical properties of the public or the consumer’s water supply system.
USED WATER. Any water supplied by the public water supply system to a consumer’s water supply system after it has passed through the service connection and is no longer under the sanitary control of the city.
(Prior Code, § 51.081) (Ord. 1493, passed 1-25-1993)