§ 7-81. Definitions.

For the purpose of this article, the following words, terms and phrases shall have the meanings given in this section, unless the context clearly indicates otherwise:

"Approved double check valve assembly" is an assembly of 2 independently operating check valves with outside stem and yoke (O.S. & Y.) valves on each side of the check valves, plus properly located test cocks for the testing of each check valve. The assembly shall be listed in the "UL Fire Protection Equipment Directory" under "Backflow Special Check Valve Devices (BAEU)." The O.S. & Y. valves shall be listed in the "UL Fire Protection Equipment Directory" under "Gate Valve (HMRZ)." The assembly shall be installed in the horizontal position, outside, above ground and shall be readily accessible for maintenance, testing and inspection. The O.S. & Y. valves shall be supervised with properly installed tamper switches connected to the fire alarm system. The O.S. & Y. valves shall also be secured with a chain and 2 interlocked padlocks, 1 of which shall be a #2396 key, Master Lock, painted red, for fire rescue services department access. Fire rescue services department connections shall not be directly attached to the assembly.

"Approved dual check valve assembly" is an assembly of 2 independently operating check valves. For fire main use a single O.S. & Y. valve shall be installed on the supply side of the approved dual check valve. The O.S. & Y. valve shall serve as the main control valve for the fire protection system. The assembly shall be listed in the "UL Fire Protection Equipment Directory" under "Backflow Special Check Valve Devices (BAEU)." The O.S. & Y. valve shall be listed in the "UL Fire Protection Equipment Directory" under "Gate Valve (HMRZ)." The assembly shall be installed in the horizontal position, outside, above ground, and shall be readily accessible for maintenance and inspection. The O.S. & Y. valve shall be secured with a chain and a #2396 key, Master Lock.

"Fire main" is that pipe, and its appurtenances, on private property between a source of water and the base of the riser for automatic fire sprinkler systems, open fire sprinkler systems, fixed water spray systems, fire standpipe systems and/or inlets to firefighting foam making systems. When connected to the public water system, the fire main begins at the supply side of the approved double check valve assembly or the approved dual check valve assembly. On NFPA 13D systems, the fire main begins at the point where the water supply line for the fire sprinkler system splits from the domestic water service.

(Ord. No. 5430, § 2, 12-12-17)