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.-. t: 8 0,-) Vitrified Glazed Clay Sewer pipe is used, it shall be at least six inch diameter pipe. B. Joints and Connections (1) Cast Iron Soill?:ipe Joints for Cast iron Pipe shall be made by inserting a roll of hemp or jute and thoroughly caulking it into place and then following with pure molten lead well caulked, not Ie ss than one inch deepi. ( 2 ) Vitrified Glazed Clay Sewer Pipe In joining Vitrified Glazed Clay Sewer Pipe, the spigot of one pipe shall be carefully centered in the bell of the next pipe. Joints shall be firmly packed with oakum or jute in such a manner as to not disturb the alignment of the pipes, and in such a way to permit the compound to have the greatest unobstructed surface for good pouring and adhesion. Joints shan be formed by means of a hotpoured com- pound, using a preparation of "JC-60" or equal, and applied according to the manu- facturer's recommendations. Jointing compound shall be completely resistant to any acid or alkaline condition found in ordinary sewage and shall be immune to attack by any chemicals found in natural soils or to soil bacteria. Care shall be exercized in placing the runner or snake to assure non-leakage during pouring and it shall not be reMoved until the vompound is sufficiently cooled to be permanently set. Joints may also be formed by means of a cold troweling material using a peeparation of II "kalktite," " sewertite," "atlastic-77," or equal. Pipes, before pouring, shall be dr,y and clean. The jointing material shall be heated until it has become quite thin, thus causing it to pour freely and smoothly. The compound shall be poured contin- uously until the joint is completely filled, leaving no air bubble in the solidified mass. (3) Asbestos Cement Sewer Pipe Joints for Asbestos Cement Sewer Pipe shall be made by use of the manufacturer's joint, which shall include an asbestos cement sleeve, teg8ti1er with rubber rings which shall form a tight and flexi ble" joint. C. Grades Unless otherwise authorized, all house sewers shall have a grade of not less than 1/8 inch per foot. A grade of 1/4 inch. per foot should be used wherever prac- tical. The contractor shall check grades before construction proceeds. Wherever peasibie, the connecting sewer shall join the building at an elevation which is below the basement floor of such building. D. Alignment No connecting sewer shall contain bends or a combination of bends which at any point shall be greated than 45 degrees, and no more than two bends, regariB.l:ss of angle, shall be permitted in any single house connection, except where manholes are con- structed at such points and in manner as directed by the Village Engineer. No connect- ing sewer shall be laid parallel to any bearing wall or footing unless further dis- tant than three feet from any such bearing wall or footing. No connecting sewer shall be laid within twenty feet of any existing well. E. Trenching and Back filling All excavations shall be open-trench work unless otherwise authorized by the Village Engineer. The foundation in the trench shall be formed to prevent any subsequent settlement of the pipes. If the foundation is good and firm earth, the earth shall be pared or molded to give a full support to the lower third of each pipe. Bell holes shall be dug to provid@i'ample spa<;e for pouri1!g o~ joints. Care must be exercised in backfilling below the center l~ne of the p~pe ~n order