13.16.150: MATERIALS AND PIPE LAYING SPECIFICATIONS:
   A.   All construction or reconstruction of private sewers and house service lines in public right-of-way and public utility easements shall be in accordance with City specifications and subject to inspection by the City Building Department.
   B.   All connections to the sanitary sewer shall have a minimum diameter of four inches (4"), and shall be made of concrete, cast iron, ductile iron or acrylonitrile butadiene styrene (ABS) schedule 40, polyvinyl chloride (PVC) schedule 40. Commencing from a point on the outer perimeter of the building into the building, a sewer service line shall be of plastic as defined above or cast iron of a diameter of four inches (4") or larger. All joints except plastic and cast iron shall be made with oakum and finished with a heavy Portland cement joint or other approved manufacturer's type joint. Cast iron joints shall be rubber slip gaskets or other approved manufacturer's type joint. All pipes shall be laid at a uniform grade of not less than one-fourth inch (1/4") per one foot (1') fall, and on solid bed of earth or selected approved backfill. When excavated material will not permit laying the connection at the full depth of the main sewer, the approving authority may authorize the use of a drop. In such event, the tap may be made in the top of the sewer bearing on the ground. All the connections shall be laid as straight as possible and all necessary changes in direction not greater than one- eighth (1/8) bend. All connections shall be without traps, sags or other obstructions that would prevent the free passage of air from point of connection to the main building stack.
   C.   Any materials not listed in this section may be used only upon written approval of the building official. (Ord. 2836 § 1, 2008)