[Amended 2-25-1975 by Ord. No. 485]
The size of the main house drain shall not be less than four inches in diameter. In damp soil, soft or made ground, the main drain from the building to the street shall be of cast iron with leaden joints. Where soil is well drained, dry and suitable to afford a good foundation for the pipe, the same may, upon permission of the Superintendent of Public Works, be constructed of salt-glazed, vitrified terra-cotta pipe. The same shall be of the best quality, free from flaws, splits or cracks, perfectly burned and well glazed over the entire surfaces, both inner and outer.