The following words and phrases used in this chapter shall have the following meanings unless a different meaning clearly appears from the context:
APPROVED BACKFLOW ASSEMBLY: That assembly which is accepted by the Utah department of health as meeting an applicable specification or as suitable for the proposed use.
AUXILIARY WATER SUPPLY: Any water supply on or available to the premises other than Washington City public water supply. These auxiliary waters may include water from another public potable water supply or any natural sources such as a well, spring, river, stream, etc., or "used waters" or "industrial fluids". These waters may be contaminated or polluted or they may be objectionable and constitute an unacceptable water source over which Washington City does not have authority for sanitary control.
BACK PRESSURE: The flow of water or other liquids, mixtures, or substances under pressure into the distribution pipes of a potable water supply system from any source other than the intended source.
BACK SIPHONAGE: The flow of water or other liquids, mixtures, or substances into the distribution pipes of a potable water supply system from any source other than the intended source, caused by the reduction of pressure in the potable water supply system.
BACKFLOW: The reversal of the normal flow of water caused by either back pressure or back siphonage.
BACKFLOW PREVENTION ASSEMBLY: An assembly or means designed to prevent backflow. Specifications for backflow prevention assemblies are contained within the international residential code, part VII, plumbing chapter 29, and replacements thereof, and the cross connection control program for Utah. All backflow prevention assemblies shall be approved by the Utah department of health prior to installation. A listing of these approved backflow prevention assemblies is available from the Utah department of health.
CONTAMINATION: An impairment of the quality of the potable water supply by sewage, industrial fluids, water liquids, compounds or other materials to a degree which creates an actual or potential hazard to the public health through poisoning or through the spread of disease.
CROSS CONNECTION: Any physical connection or arrangement of piping or fixtures between two (2) otherwise separate piping systems, one of which contains potable water and the other nonpotable water or industrial fluids of questionable safety, through which, or because of which, backflow may occur into the potable water system. This shall include any temporary connections, such as swing connections, removable sections, four (4) way plug valves, spools, dummy sections of pipe, swivel or changeover devices or sliding multiport tubes.
CROSS CONNECTION, CONTAINMENT: The installation of an approved backflow assembly at the water service connection to any customer's premises where it is physically and economically infeasible to find and permanently eliminate or control all actual or potential cross connections within the customer's water system. It shall also include isolation by the installation of an approved backflow prevention assembly on the service line leading to and supplying a portion of a customer's water system where there are actual or potential cross connections which cannot be effectively eliminated or controlled at the point of the cross connection.
CROSS CONNECTION, CONTROLLED: A connection between a potable water system and a nonpotable water system with an approved backflow prevention assembly properly installed and maintained so that it will continuously afford the protection commensurate with the degree of hazard. (Ord. 90-17, 12-13-1990)