(a) When more than one (1) standpipe is required in a building the standpipes shall be connected at their bases by pipe of a size equal to or greater than that of the larger standpipe to permit water from any source to supply all standpipes. Where only one (1) standpipe is installed, the supply connections thereto shall not be smaller than the standpipe. Where standpipes are supplied by gravity or pressure tanks located above the standpipe system, the supply pipe therefrom to the standpipe system shall not be smaller in size than the larger standpipe.
(b) Where the water supply is furnished by a gravity tank or a pressure tank located in the building at or above the topmost outlet, a check valve shall be provided below the tank and a stop valve between the check valve and the tank.
(c) Sufficient stop valves or check valves shall be provided to permit cutting off any standpipe riser without interrupting the supply to other risers from the same source of supply. Stop valves which are located above the ground floor and which must be closed to permit continued use of one (1) standpipe in case of failure of another, shall be arranged and equipped to permit operation of such stop valves from the ground floor level, from the pump room or from other accessible locations approved by the Division of Fire. Where necessary to reach manually operated stop valves placed more than six (6) feet above a floor level, fixed incombustible ladders shall be provided.
(d) Each water service connection which directly and independently supplies a stand-pipe system or fire pipe shall be equipped outside of the building in an approved location with a control valve in a flush sidewalk or lawn valve box of an approved type, or with a post indicator valve, clearly marked “Standpipe Supply Control.” Each such water service connection shall be installed in conformity with ordinances governing water service connections and the rules and regulations of the Division of Water and Heat.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)