Raleigh City Code § 8-2141 DEFINITIONS.
Sec. 8-2141. - DEFINITIONS.
As used in this article, 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 (1) inch.
Auxiliary intake. Any piping connection or other device whereby water may be obtained from a source other than the City's public water supply.
Auxiliary water supply. Any water other than the City of Raleigh's 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 City of Raleigh.
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 10' for the purpose of this article.
Certified tester. A person who has proven his/her competency to test and make reports on backflow assemblies as evidenced by certification of successful completion of a training program approved by the Raleigh Director of Public Utilities or his designee.
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.
Cross-connection. Any actual or potential connection between the public water supply and a source of contamination or pollution.
Cross-connection control coordinator. The official position established and authorized by the City and designated by the Raleigh Director of Public Utilities to administer, interpret this section and who shall be a certified tester and may serve as Operator in Responsible Charge as recognized by North Carolina Department of Environmental and Natural Resources 15A NCAC 18D .0701.
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.
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.
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.
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.
Public water supply. The water and waterworks system of the City of Raleigh 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 as system number 03-92-010.
Reduced pressure zone principle backflow prevention assembly (RPZ). A type of backflow assembly manufactured pursuant to ASSE Standard 1013.
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.
(Ord. No. 2015-397, §1, 2-16-15, eff. 2-21-15; Ord. No. 2018-874, §1, 9-18-18)
