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D. Ductile Iron Pipe and Fittings <br />1. General: <br />All ductile iron pipe shall be manufactured in accordance wi h AWWA <br />Specifications C-150 & C-151. All buried ductile iron pipshall be <br />manufactured in accordance with AWWA Specification C-151 and shall <br />be Class 52 minimum. All exposed ductile iron pipe shall b- Class 53 <br />minimum. <br />2. Fittings: <br />All underground fittings shall be either bell and spigot, or echanical <br />joint. Mechanical joints shall conform to AWWA specific tion C1lO <br />(ANSI 21.10-87), or latest revision. All exposed aboveground fittings <br />shall be flanged joint. <br />3. Bell and Spigot Connections: <br />Joints in bell and spigot pipe shall be push -on, mechanical, or restrained <br />joints in accordance with AWWA Standard C-111 (ANSI 21 11-85), or <br />latest revision. Mechanical joint pipe set -screw type retainer •lands will <br />not be permitted. <br />4. Flanged Connections: <br />Flanged pipe with screwed -on flanges shall be furnished with long hubs, <br />and the flanges shall be screwed on the threaded end of the • ipe in the <br />shop, and the face of the flange and end of pipe refaced toget er. There <br />shall be no leakage through the pipe threads and the flang: s shall be <br />designed to prevent corrosion of the threads from outside. he back of <br />the hub shall be caulked where the hub threads joint with th - pipe. <br />5. Valve Box Adjustments: <br />Cost of valve nut extenders shall be included in cost of valve box <br />adjustments where needed. <br />E. Disinfecting Potable Water Pipelines <br />Before being placed in service, all potable water pipelines shall be chlorinated in . ccordance <br />with the latest edition of AWWA C-651, "Standard Procedure for Disinfecting Wa er Mains", <br />except that the use of tablets is strictly prohibited. The procedure shall be appr•ved by the <br />Engineer. The location of the chlorination and sampling points will be as speci ied by the <br />Florida Department of Environmental Protection, Water Distribution System Per it. Taps for <br />chlorination and sampling shall be uncovered and backfilled by the Contractor, . s required. <br />Item of Payment <br />Payment shall be made under: <br />Bid Item No. 1644-800 — Fire Hydrant (Relocate) — Per Each. <br />01025-21 Technical Specifi ations <br />G\Piihlir 1Nr,r4e\FAI(,It\IFFRINIn nl\/IRIC Nl PRC IFRTS\111d-1n7th Ava I1Aillinn Qnth St to Q4th St\Arimin\hiri rincnmanta Mactar ( ntrart <br />