(A)   No unauthorized person shall uncover, make any connections with or opening into, use, alter or disturb any public sewer or appurtenance thereof without first obtaining a written permit from the City Engineer.
   (B)   All costs and expense incident to the installation and connection of the building sewer shall be borne by the owner. The owner shall indemnify the city from any loss or damage that may directly or indirectly be occasioned by the installation of the building sewer.
   (C)   A separate and independent building sewer shall be provided for every building; except where one building stands at the rear of another on an interior lot and no private sewer is available or can be constructed to the rear building through an adjoining alley, court, yard or driveway, the building sewer from the front building may be extended to the rear building and the whole considered as one building sewer.
   (D)   Old building sewers may be used in connection with new buildings only when they are found, on examination and test by the City Engineer to meet all requirements of this chapter.
   (E)   The size and slope of the building sewer shall be subject to the approval of the City Engineer, but in no event shall the diameter be less than four inches. The slope of four-inch pipe shall be not less than one-fourth inch per foot, and the slope of six-inch pipe shall be not less than one-eighth inch per foot.
   (F)   Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. No building sewer shall be laid parallel to or within three feet of any bearing wall, which might thereby be weakened. The depth shall be sufficient to afford protection from frost. The building sewer shall be laid at uniform grade and in straight alignment in so far as possible. Changes in direction shall be made only with properly curved pipe and fittings.
   (G)   In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such drain shall be lifted by approved artificial means and discharged to the building sewer.
   (H)   All excavations required for the installation of a building sewer shall be open trench work unless otherwise approved by the City Engineer. Pipe laying and backfill shall be performed in accordance with ASTM specification (C12-19), except that no backfill shall be placed until the work has been inspected.
   (I)   The connection of the building sewer into the public sewer shall be made at the “Y” branch, if such branch is available at a suitable location. If the public sewer is 12 inches in diameter or less, and no properly located “Y” branch is available, the owner shall at his or her expense install a “Y” branch in the public sewer at the location specified by the City Engineer. Where the public sewer is greater than 12 inches in diameter, and no properly located “Y” branch is available, a neat hole may be cut into the public sewer to receive the building sewer, with entry in the downstream direction at an angle of about 45 degrees. A 45 degree ell may be used to make such connection, with the spigot end cut so as not to extend past the inner surface of the public sewer. The invert of the building sewer at the point of connection shall be at the same or at a higher elevation than the invert of the public sewer. A smooth, neat joint shall be made, and the connection made secure and water-tight by encasement in concrete. Special fittings may be used for the connection only when approved by the City Engineer.
   (J)   The applicant for the building sewer permit shall notify the City Engineer when the building sewer is ready for inspection and connection to the public sewer. The connection shall be made under the supervision of the City Engineer.
   (K)   All excavations for building sewer installation shall be adequately guarded with barricades and lights so as to protect the public from hazard. Streets, sidewalks, parkways and other public property disturbed in the course of the work shall be restored in a manner satisfactory to the city.
(1974 Code, § 7-5-9) (Ord 459, passed 11-9-1960; Ord. 609, passed 10-10-1978)