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All parts of the system shall be provided with indicating valves so that any portion can be taken out of service for repairs or in an emergency without interfering with the operation of the remainder of the system. Each system shall be provided with a gate valve so located as to control all sources of water supply except siamese connections. All valves in connections to water supply and from main to risers shall be outside screw and yoke pattern or other indicating type.
Check valves shall be installed in all sources of water supply including both suction and discharge side of the fire pump; they shall be straightway pattern or silent type installed in horizontal or vertical piping according to the valve's listing. A gate valve shall be installed on each side of each check valve unless otherwise noted.
All valves shall be rated for pressures not less than the maximum pressure developed at the point in the system where the valve is installed including the shutoff pressure of the fire pump.
All valves, including test and drain valves, shall have a durable sign attached indicating their function or area controlled.
A diagram drawn to scale showing the city connection, fire pump, siamese connections, standpipe main, risers and all valves shall be permanently posted in a conspicuous location in the pump room.
Gate valves controlling water supplies for main and risers shall be located where readily accessible. Valves shall not be located within concealed spaces.
All valves in mains and risers shall be secured open.
(Prior code § 91-86; Amend Coun. J. 10-30-96, p. 31261, § 1)