(A) Building sewer shall be of extra heavy duty cast iron pipe. Polyvinyl chloride pipe or plastic pipe may be used upon approval by the Superintendent or designated representative. No building sewer pipe shall be laid within ten feet of any well. When building sewer pipe shall come within 20 feet of any well, it shall be of heavy duty cast iron construction. The minimum size of building sewer shall be of four-inch extra heavy cast iron pipe or four-inch PVC pipe (ASTM Specification D-1784) with a minimum wall thickness of 0.125 inches, and conform to requirements of Type1, Grade 1, or four-inch ABS (ASTM Specification D-1788), Type 1 or Type 4. Change in direction of building sewer shall require location of the clean out with the provision that the clean out shall be located at least every 75 feet. All fittings shall be require approval by the Superintendent.
(B) Joints shall comply with the following specifications: polyvinyl chloride sewer pipe shall be pipe meeting requirements for Type 1, Grade 1 of the Tentative Specifications for Rigid Polyvinyl Chloride Compounds ASTM Designation D-1784, and the joints for both PVC and ABS shall be bell and spigot with solvent cement. All joints and connections shall be made gastight and watertight.
(C) PVC or ABS sewer pipe may be used in areas where the building sewer is exposed to damage by tree roots or where building sewer is located below ground water level. If the building sewer is installed in filled or unstable ground, the building sewer shall be of cast iron pipe, except that non-metallic material may be accepted if laid on a suitable concrete bed or cradle as approved by the Superintendent.
(1997 Code, § 19.14)