“Active date” means the first day that a backflow prevention assembly or backflow prevention method is used to control a cross-connection in each calendar year.

“Air gap” is a physical separation between the free flowing discharge end of a potable water supply pipeline and an open or nonpressure receiving vessel installed in accordance with standard AMSE A112.1.2.

“Backflow” means the undesirable reversal of flow of water or mixtures of water and other liquids, gases or other substances into the public water system’s distribution system from any source or sources other than its intended source.

“Backflow contamination event” means backflow into a public water system from an uncontrolled cross-connection such that the water quality no longer meets the Colorado Primary Drinking Water Regulations or presents an immediate health and/or safety risk to the public.

“Backflow prevention assembly” means any mechanical assembly installed at a water service line or at a plumbing fixture to prevent a backflow contamination event; provided, that the mechanical assembly is appropriate for the identified contaminant at the cross-connection and is an inline field-testable assembly.

“Backflow prevention method” means any method and/or nontestable device installed at a water service line or at a plumbing fixture to prevent a backflow contamination event; provided, that the method or nontestable device is appropriate for the identified contaminant at the cross-connection.

“Certified cross-connection control technician” means a person who possesses a valid backflow prevention assembly tester certification from one (1) of the following approved organizations: American Society of Sanitary Engineering (ASSE) or the American Backflow Prevention Association (ABPA). If a certification has expired, the certification is invalid.

“Containment” means the installation of a backflow prevention assembly or a backflow prevention method at any connection to the public water system that supplies an auxiliary water system, location, facility, or area such that backflow from a cross-connection into the public water system is prevented.

“Containment by isolation” means the installation of backflow prevention assemblies or backflow prevention methods at all cross-connections identified within a customer’s water system such that backflow from a cross-connection into the public water system is prevented.

“Controlled” means having a properly installed, maintained, and tested or inspected backflow prevention assembly or backflow prevention method that prevents backflow through a cross-connection.

“Cross-connection” means any connection that could allow any water, fluid, or gas such that the water quality could present an unacceptable health and/or safety risk to the public to flow from any pipe, plumbing fixture, or a customer’s water system into a public water system’s distribution system or any other part of the public water system through backflow.

“Multifamily” means a single residential connection to the public water system’s distribution system from which two (2) or more separate dwelling units are supplied water.

“Single-family” means:

“Uncontrolled” means not having a properly installed and maintained and tested or inspected backflow prevention assembly or backflow prevention method, or the backflow prevention assembly or backflow prevention method does not prevent backflow through a cross-connection.

“Water supply system” means a water distribution system, piping, connection fittings, valves and appurtenances within a building, structure, or premises. Water supply systems are also referred to commonly as premises plumbing systems. (Ord. 771 §2 (Exh. A), 2019)