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.
There shall be two classes of building sewer permits:
A. 
For residential and commercial service.
B. 
For service to establishments producing industrial wastes. In either case, the owner or his agent shall make application on a special form furnished by the City. The permit application shall be supplemented by any plans, specifications or other information considered pertinent in the judgment of the City Engineer. A permit and inspection fee of $15 for sewer permit shall be paid to the City Comptroller at the time the application is filed.
All costs and expenses 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.
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 a separate building sewer.
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 Part 2.
A. 
Generally. The building sewer shall be cast-iron soil pipe, ASTM Specification A74 or equal or transite or equal, asbestos-cement house connection pipe or other suitable material approved by the City Engineer. Joints shall be tight and waterproof. Any part of the building sewer that is located within 10 feet of a water service pipe shall be constructed of cast-iron soil pipe with leaded joints. Cast-iron pipe with leaded joints may be required by the City Engineer where the building sewer is exposed to damage by tree roots. If installed in filled or unstable ground the building sewer shall be of cast-iron soil pipe, except that nonmetallic material may be accepted if laid on a suitable concrete bed or cradle as approved by the City Engineer. Building sewer pipe shall have a maximum length of five feet between joints.
B. 
Size and slope. 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 such four-inch pipe shall be not less than 1/8 inch per foot.
C. 
Required elevation of building sewer. 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, insofar as possible. Changes in direction shall be made only with properly curved pipe and fittings.
D. 
Artificial lift. 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.
E. 
Excavations. 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 C12-58T, except that no backfill shall be placed until the work has been inspected.
F. 
Joints.
(1) 
All joints and connections shall be made gastight and watertight.
(2) 
Cast-iron pipe joints shall be firmly packed with oakum or hemp and filled with molten lead not less than one inch deep. Lead shall be run in one pouring and caulked tight. The entire joint shall conform to AWWA Specification C600-54T Section 9a. No paint, varnish or other coating shall be permitted on the jointing material until after the joint has been tested and approved. The transition joint between cast-iron pipe and transite pipe shall be made with either lead or approved hot-poured jointing material as specified herein.
(3) 
Material for hot-poured joints shall not soften sufficiently to destroy the effectiveness of the joint when subjected to a temperature of 160° F. nor be soluble in any of the wastes carried by the drainage system. The joint shall first be caulked tight with jute, hemp or similar approved material. "Transite," asbestos-cement pipe joints, shall follow the manufacturer's recommendations.
(4) 
Other jointing materials and methods may be used only by approval of the City Engineer.
The connections of the building sewer into an existing public sewer shall be made at the property line. If a lateral connection has not previously been provided, the lateral will be constructed from the existing public sewer to the property line by the Department of Public Works upon submittal of a proper request by the property owner. The method of connection of the lateral to the public sewer will depend upon the type of sewer material used and, in all cases, shall be approved by the City Engineer.
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 or his representative.
When trenches are opened for the laying of house sewer lateral pipes, such trenches shall be inspected by the City Engineer before the trenches are filled, and the plumber performing such work shall notify the City Engineer when the laying of house sewer is completed. The filling of a trench before inspection is made will subject the plumber to whom a permit is issued to a penalty of $25 for each offense.
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.