§ 53.00  DEFINITIONS.
   As used in this chapter, the following terms shall have the meanings provided in this section unless the context clearly indicates otherwise.
   AIR-GAP. A physical separation sufficient to prevent backflow between the free-flowing discharge end of the public water system and any other system. Physically defined as a distance equal to twice the diameter of the supply side pipe diameter but never less than one inch.
   APPROVED.
      (1)   As herein used in reference to a water supply, it shall mean a water supply that has been approved by the North Carolina Department of Environment, Health, and Natural Resources, Division of Environmental Health, Public Water Supply Section.
      (2)   As herein used in reference to an air gap, a double check valve assembly, a reduced pressure backflow prevention assembly or other backflow prevention assemblies or methods, it shall mean an approval by the town.
   ATMOSPHERIC VACUUM BREAKER (AVB) (Approved). A backflow prevention assembly used to prevent backsiphonage which is designed so as not to be subject to static line pressure.
   AUXILIARY INTAKE. Any piping connection or other device whereby water may be obtained from a source other than the town’s public water supply.
   AUXILIARY WATER SUPPLY. Any water other than the Town of Clayton public water supply as defined herein; including, but not limited to recycled water, grey water, rain water, well water, cistern water, reuse water and any other water supply from water purveyors other than the Town of Clayton.
   BACKFLOW. The flow of water or other liquids, mixtures or substances, under positive or reduced pressure in the distribution pipes of the public water supply from any source other than its intended source.
   BACKFLOW ASSEMBLY. An inline testable and repairable mechanical valve arrangement used to protect the public water supply that meets or exceeds standards set forth by the University of Southern California for Cross Connection Control and Hydraulic Research (USCFCCHR) and the American Society of Sanitary Engineering (ASSE) by being on the agency's approval list. A backflow assembly used on fire suppression systems must have the additional approval of the Factory Mutual (FM) and comply with the National Fire Protection Association (NFPA) code.
   BACKFLOW DEVICE. A mechanical backflow assembly without shut-off valves or test cocks and that is not testable after installation.
   BACKPRESSURE. A condition in which an owner's water supply system pressure is greater than the public water supply system pressure.
   BACKSIPHONAGE. The flow of water or other liquids, mixtures or substances into the distribution pipes of the public water supply system from any source other than its intended source caused by the sudden reduction of pressure in the public water supply system.
   BUILDING STORY. A building story is equal to ten feet for the purpose of this chapter.
   CERTIFIED TESTER. A person who has proven his or her competency to test and make reports on backflow assemblies as evidenced by certification of successful completion of a training program approved by the Public Works and Utilities Director or his or her designee.
   CONSUMER, CUSTOMER. Any person, firm, or corporation using or receiving water from the town.
   CONSUMER'S POTABLE WATER SYSTEM. That portion of the privately-owned potable water system located between the point of delivery (service connection) and the point of use. This system will include, but is not limited to: all pipes, conduits, tanks, receptacles, fixtures, equipment, and appurtenances used to produce, convey, store, or use potable water.
   CONSUMER'S WATER SYSTEM. Any water system located on the consumer's premises, whether supplied by a public potable water or an auxiliary water supply. The system or systems may be either a potable water system or an industrial piping system.
   CONTAINMENT ASSEMBLY. A backflow assembly, installed at the point of separation between the public water supply and a private service or private distribution system or at the point of metering.
   CONTAINMENT PROTECTION. A containment assembly installed at the point of separation between the public water supply and a private service or private distribution system or at the point of metering.
   CONTAMINATION. An impairment of the quality of the water which creates an actual hazard to the public health through poisoning or through the spread of disease by sewage, industrial fluids, waste, and the like.
   CROSS-CONNECTION. Any actual or potential connection between the public water supply and a source of contamination or pollution.
   DOUBLE CHECK VALVE ASSEMBLY (DCVA). A type of backflow assembly manufactured pursuant to ASSE Standard 1015.
   DUAL CHECK VALVE. A type of backflow device manufactured pursuant to ASSE Standard 1024.
   FIRE LINE. A system of pipes and equipment used to supply water in an emergency for extinguishing fire.
   INDUSTRIAL FLUIDS. Any fluid or solution which may be chemically, biologically, or otherwise contaminated or polluted in a form or concentration which would constitute a health, system, pollutional, or plumbing hazard if introduced into an approved water supply. This may include, but is not limited to: polluted or contaminated used waters; all types of processed waters and "used waters" originating from the public potable water system which may deteriorate in sanitary quality; chemicals in fluid form; plating acids and alkalies; circulated cooling waters connected to an open cooling tower and/or cooling waters that are chemically or biologically treated or stabilized with toxic substances; contaminated natural waters such as from wells, springs, streams, rivers, ponds, lakes, irrigation canals or system, and the like; oils, gases, glycerines, paraffins, caustic and acid solutions and other liquid and gaseous fluids used industrially, for other processes, or for firefighting purposes.
   INDUSTRIAL PIPING SYSTEM (CONSUMER'S). Any system used by the consumer for transmission of or to store any fluid, solid, or gaseous substance other than an approved water supply. Such a system includes, but is not limited to: all pipes, conduits, tanks, receptacles, fixtures, equipment, and appurtenances to produce, convey, or store substances which are or may be polluted or contaminated.
   INTERCONNECTION. Any system of piping or other arrangement whereby the public water supply is connected directly to a sewer, drain, conduit, pool, heat exchanger, storage reservoir, or other device which does or may contain sewage or other waste or substance which would be capable of imparting contamination to the public water supply.
   LABORATORY TESTING (Approved). Refers to the Foundation for Cross-Connection Control and Hydraulic Research of the University of Southern California (FCCCHR-USC) or another lab having the equivalent facilities for both the laboratory and field evaluation of the assemblies approved by the AWWA and/or APSE.
   ISOLATION ASSEMBLY. A backflow assembly required by the North Carolina Plumbing Code that is installed within a private plumbing or distribution system to isolate a localized hazard from the remainder of the private system.
   MODERATE HAZARD. A cross-connection or potential cross-connection involving any substance that generally would not be a health hazard but would constitute a nuisance or be aesthetically objectionable if introduced into the public water supply.
   NON-POTABLE WATER. A water supply which has not been approved for human consumption by the North Carolina Department of Environment, Health, and Natural Resources, Division of Environmental Health, Public Water Supply Section.
   OWNER. Any person who has legal title to, or license to operate or inhabit, a property upon which a cross-connection inspection is to be made or upon which a cross-connection is present.
   POLLUTION. An impairment of the quality of the water to a degree which does not create a hazard to the public health, but which does adversely and unreasonably affect the aesthetic qualities of such waters for domestic use.
   POTABLE WATER. Any public potable water supply which has been investigated and approved by the North Carolina Department of Environment, Health, and Natural Resources, Division of Environ mental Health, Public Water Supply Section. The system must be operating under a valid health permit. In determining what constitutes an approved water supply, the North Carolina Department of Environment, Health, and Natural Resources, Division of Environmental Health, Public Water Supply Section has final judgment as to its safety and potability.
   PRESSURE VACUUM BREAKER (PVB) (Approved). A backflow prevention assembly suitable for continuous pressure, to be used to provide protection against backsiphonage.
   PUBLIC POTABLE WATER SYSTEM. Any publicly- or privately-owned water system operated as a public utility, under a current health permit, to supply water for domestic purposes. This system will include all sources, facilities, and appurtenances between the source and the point of delivery (service connection) such as valves, pumps, pipes, conduits, tanks, receptacles, fixtures, equipment, and appurtenances used to produce, convey, treat, or store potable water for public consumption or use.
   PUBLIC WATER SUPPLY. The water and waterworks system of the Town of Clayton and its customers outside the corporate limits, for general use as potable water and which is recognized as a public water supply by the North Carolina Department of Environment and Natural Resources.
   PURVEYOR, WATER. The owner or operator of a public potable water system, providing an approved water supply to the public.
   REDUCED PRESSURE ZONE PRINCIPLE BACKFLOW PREVENTION ASSEMBLY (RPZ). A type of backflow assembly manufactured pursuant to ASSE Standard 1013.
   SERVICE CONNECTION. The terminal end of a service connection from the public potable water system, (i.e., where the water purveyor may lose jurisdiction and sanitary control of the water at its point of delivery to the consumer's water system). If a water meter is installed at the end of the service connection, then the service connection shall mean the downstream end of the water meter.
   SEVERE HAZARD. A cross-connection or potential cross-connection involving any substance that could, if introduced into the public water supply, cause death or illness, spread disease, or have a high probability of causing such effects.
   USED WATER. Any water supplied by a water purveyor from a public potable water system to a consumer's water system after it has passed through the service connection and is no longer under the control of the town (water purveyor).
(Ord. passed 3-20-95; Am. Ord. 2020-01-06, passed 1-21-20)