(A) Material required. The building sewer shall be cast iron soil pipe ASTM Specification (A74-72) or equal (or most current ASTM Designation); or vitrified clay sewer pipe, ASTM specification (C-700-74) or equal (or most current ASTM Designation); or other suitable material approved by the Director of Public Works. 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 or equal substitute. Cast iron pipe with leaded joints may be required by the Director of Public Works where the building sewer is exposed to damage by tree roots. If installed in filled 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 Director of Public Works.
(B) Size and slope. The size and slope of the building sewer shall be subject to the approval of the Director of Public Works, but in no event shall the diameter be less than 6 inches. The slope of the 6-inch pipe shall be not less than one-eighth inch per foot. For larger sizes of pipe, the minimum slopes shall be according to all state and local regulations.
(1992 Code, § 51.29) (Am. Ord. 2005-MC13, passed 10-24-2005) Penalty, see § 51.99