(a) All pipes, fittings and specials shall be laid in accordance with the manufacturer's instructions, with AWWA Standard C 600 and with this chapter.
(b) All pipes and appurtenances shall be installed true to line, grade and location; with joints centered, spigots home; proper support and blocking provided; and all valve stems plumb. (Ord. 21-78. Passed 6-27-78.)
(c) Trenches shall be excavated to the depths shown by profiles on the plans unless additional depth is required to avoid interference with existing underground facilities.
(1) The pipes shall have a minimum cover of four feet below finish grade at all times.
(2) Trenches shall have vertical sides and be wide enough to properly install the pipes but not wider.
(3) The width of the trench at the top shall not exceed two feet plus the nominal diameter of the pipes.
(4) If over digging occurs, the trench bottom must be brought back to grade with thoroughly tamped granular bedding as specified in this chapter.
(5) Water and sewer lines shall be placed five feet from each other when placed at the same depth.
(6) If, for any reason, this requirement cannot be met, water and sewer lines may be placed closer together or in the same trench, provided that the sewer line is placed twelve to eighteen inches lower than the water line.
(7) All water and sewer line repair, replacement and/or new installation shall be approved by the Director of Public Service or his or her appointed representative.
(Ord. 87-07. Passed 4-6-87.)
(d) The pipes must be laid level or on a grade to prevent humps that will cause air pockets. Grade stakes or a level shall be used on each pipe to ensure its correctness.
(e) Pipes laid in excavations shall be laid on good foundation with a uniform bearing, trimmed to shape and, where required, secured against settlement in a manner approved by the Director of Public Service.
(1) Compact granular bedding, of a minimum depth of three inches, shall be used under all grey cast iron pipe.
(2) Bedding is optional under ductile cast iron pipe.
(3) Granular bedding shall be crushed stone or gravel size gradation meeting Ohio Department of Transportation Specification Size No. 67 or an approved equal.
(f) At joints, enough depth and width shall be provided to permit the jointers to reach entirely around the pipes so that the joints may be made in a proper manner. All elbows, tees, etc. shall be properly backed up and anchored so that there will be no movement of the pipes in the joints due to internal or external pressure.
(g) The open ends of all pipes and special castings shall be plugged or otherwise closed with a watertight plug to the approval of the Director before leaving the work for the night and at other times of interruption of the work. All pipe ends or tees which are to be permanently closed shall be plugged with a cast iron or other approved plug, bolted to the end bell.
(h) The pipes shall be carefully lowered into the trench by crane or other approved means.
(1) Pipe interiors shall be thoroughly cleaned of dirt and foreign matter before laying, by brushing, swabbing or another method approved by the Director, and means shall be provided to prevent entry of dirt during progress of installation.
(2) Ground water shall be kept out of the pipes at all times.
(3) Just prior to joining pipes, the surfaces of joint rings shall be wiped clean, and the joint rings and rubber gaskets shall be liberally lubricated with an approved type of vegetable oil soap.
(4) The spigot end shall be entered into the bell of the pipe already laid, making sure that both pipes are properly aligned.
(5) Before the joint is fully home, the position of the gasket in the joint shall be determined by means of a suitable feeler gauge supplied by the pipe manufacturer.
(6) The pipe shall then be forced home firmly and fully. In its final position, the pipe shall not be deflected more than recommended by the pipe manufacturer.
(i) At each line valve, bend, plug, tee, etc., where hydrostatic pressures exert a disjointing pressure, the pipe joints shall be tied together.
(1) For pipes twelve inches or smaller, a ductile iron mechanical joint retainer ring shall be used except as directed by the Director.
(2) Where directed for small size and for all large pipes, approved blocking shall be used.
(Ord. 21-78. Passed 6-27-78; Ord. 2022-15. Passed 5-16-22.)