All house sewers shall be constructed of vitrified sewer pipe of the bell and spigot pattern. All pipe shall be of deep and wide socket dimensions and may be either in two or three-foot lengths. All pipe shall be six inches in internal diameter and shall be true and straight and of first quality. The Assistant Service Director shall have the right to reject all house sewer pipe which does not conform to these specifications.
Under no circumstances shall connections to the street sewers be made at points other than at the Y-connections provided by the City in the street sewers, except under special permission and under special direction of the City Engineer. Unless under special permission of the City Engineer or the Assistant Service Director, all pipe shall be laid in open trench at a minimum slope of one-quarter inch per foot.
Joints shall be made with special care, using first a hemp gasket soaked in neat Portland cement and carefully caulked into the bell of the pipe. Upon the hemp gasket there shall be placed a mortar consisting of one part Portland cement and two parts clean coarse sand. The mortar shall extend around the pipe and shall be beveled off for at least three inches. Special care shall be exercised to secure a good joint upon the invert of the pipe.
Under special conditions, if required by the City Engineer, house services shall be constructed of extra heavy cast iron soil pipe with lead joints.
The sewer trench between the sewer and the property line shall be carefully and thoroughly tamped in a workmanlike manner, or the material may be puddled as it is deposited in the trench or the entire trench may be flooded with water at the discretion of the Assistant Service Director or the City Engineer.