Specifications include, but are not limited to: Ductile Iron PipeUnless otherwise specified, ductile iron pipe shall be class 52 and manufactured in the United States of America and shall conform to ANSI 21.51 (AWWA C-151) for "pipe centrifugally cast in metal molds for water". Cement linings shall be double the standard thickness and shall conform to ANSI A21.4. Seal coating shall be applied inside and out. All pipe shall be push-ontype joint, in accordance with ANSI A21.11. In addition, all pipe purchased may be subject to inspection and acceptance by the Manchester Water Works or its agent. The supplier and/or manufacturer shall be responsible for such accommodations and handling as are required to allow for proper inspection, if so requested by the Manchester Water Works.Additional RequirementsThe pipe and fittings, in addition to meeting all of the appropriate requirements of ANSI and AWWA, shall conform to the following: 1.) All pipe and fittings shall be free of all significant casting flaws both inside and out, including slag holes, slag inclusions, laps, lamination, mold splash, and pin holes. 2.) All linings shall be of uniform thickness with no significant waving and/or roughness. 3.) Bell ends shall be cleaned of cement and excess seal coat material. 4.) Spigot ends shall be properly tapered and cut ends shall be ground.FittingsUnless otherwise specified, all mechanical joint fittings shall be complete with accessories and shall conform to AWWA C104/ANSI A21.4, C111/A21.11 or C153/A21.53. All fittings shall be pressure rated for 350 psi, ductile iron with double cement-lining thickness and seal coated inside and out, or two-part epoxy coated, and shall be manufactured in the United States of America. Fittings 4"-12" shall be compact pattern per AWWA C153. In addition, all fittings purchased may be subject to inspection and acceptance by the Manchester Water Works or its agent. The supplier and/or manufacturer shall be responsible for such accommodations and handling as are required to allow for proper inspection if so requested by the Manchester Water Works.Additional RequirementsThe fittings, in addition to meeting all of the appropriate requirements of ANSI and AWWA, shall conform to the following: 1.) All fittings shall be free of all significant casting flaws both inside and out, including slag holes, slag inclusions, laps, lamination, mold splash, and pin holes. 2.) All linings shall be of uniform thickness with no significant waving and/or roughness. 3.) Mechanical joint bells and glands shall be dimensionally correct and free of all slag and rough edges at bolt holes. 4.) Fittings shall include all mechanical joints accessories necessary to complete connections. Mechanical joints accessories shall be wedge action type conforming to these specifications.Butterfly ValvesGeneral: All butterfly valves shall be manufactured in the United States of America and shall be open right with mechanical joint end connection, complete with accessories for buried service. Valve shall be of tight closing rubber seat type with seats bonded or mechanically retained into the valve body. Valves shall have a full uninterrupted 360 degree sealing surface and shall be bubble tight at rated pressure in both directions. Valves shall be designed for use in either throttling application or for very infrequent operation after extended periods of inactivity. Valves shall be in full compliance with AWWA specification C-504, class 150B, with the following exceptions:1.) All valve bodies shall be of cast iron conforming to ASTM A-126, class B with integral cast ends as required to meet application requirements. All exposed ferrous surfaces shall be coated with an 8 mil thickness of a two-part epoxy coating, holiday free, conforming to AWWA C-550 and NSF-61 standards. Exposed bolts and nuts shall be Type 304 stainless steel.The manufacturer shall furnish an affidavit that all requirements contained in this section have been met.2.) All valve discs shall be streamlined and present the smallest profile possible consistent with the structural requirements of the pressure class. The valve discs shall be of offsetor flow throughdesign and material composition of cast or ductile iron. Disc sealing edge shall have a continuous uninterrupted 360 degree sealing surface of 18-8 stainless steel.3.) Valve shafts shall be of 18-8 Type 304 stainless steel or carbon steel with stainless steeljournals. Shaft design shall be of “thru” or “stub” type construction with at least 1” shaft diameter engagement into disc. Shaft to disc connection shall be of a rigid, non-slip type connection.4.) Valve seats shall be a rubber material bonded or mechanically retained.5.) Valve Bearings shall have a significant difference in hardness from the valve shaft.6.) Valve actuators shall be designed as an integral part of the valve and shall meet or exceed all the requirements of AWWA C-504. Actuators shall be of rack and pinion, link and lever, or travelling design. All moving parts penetrating into the actuator shall have corrosion resistant surfaces in contact with the housing seals. All actuator types, in a given size, to be interchangeable and fastened to valves with readily accessible bolts. All actuators must fit on the valves they are designed to operate in any mounted position or rotational direction without any special preparation to either valve or the actuator.
