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1. Brass or bronze valves on sprinkler risers mounted to the exterior of the building may be left unpainted. 2. Where OS &Y valves on the detector check assembly are the only control valves, at least one OS &Y valve shall be painted red. (2) Section 6.2.9 is hereby revised to read as follows: All connections to private fire service mains for fire protection systems shall be arranged in accordance with one of the following so that they can be isolated: (1) A post indicator valve installed not less than 40 ft (12 m) from the building (a) For buildings less than 40 ft (12 m) in height, a post indicator valve shall be permitted to be installed closer than 40 ft (12 m) but at least as far from the building as the height of the wall facing the post indicator valve. (2) A wall post indicator valve (3) An indicating valve in a pit, installed in accordance with Section 6.4 (4) A backflow preventer with at least one indicating valve not less than 40 ft (12 m) from the building (a) For buildings less than 40 ft (12 m) in height, a backflow preventer with at least one indicating valve shall be permitted to be installed closer than 40 ft (12 m) but at least as far from the building as the height of the wall facing the backflow preventer. (5) Control valves installed in a fire -rated room accessible from the exterior (6) Control valves in a fire -rated stair enclosure accessible from the exterior (3) Section 10.1.5 is hereby added as follows: 10.1.5 All ferrous pipe and joints shall be polyethylene encased per AWWA C150, Method A, B, or C. All fittings shall be protected with a loose 8 -mil polyethylene tube or sheet. The ends of the tube or sheet shall extend past the joint by a minimum of 12 inches and be sealed with 2 inch wide tape approved for underground use. Galvanizing does not meet the requirements of this section. Exception: 304 or 316 Stainless Steel pipe and fittings (4) Section 10.4.1.1 is hereby revised to read as follows: Ordinance No. NS -2905 Page 28 of 31