All house drains, connecting the main sewer with the receiving basin, and all branches connecting with water closets, and sinks, shall be not less than six inches (6") internal diameter connections with down-spouts or hand basins only, four inch (4") pipe will be permitted when preferred; and any variation from these dimensions can only be made upon written permission of the Village Engineer defining the special sizes to be used, and specifically defining the special reasons governing such authorization. The use of metallic pipe or socket-joint pipe within the lot lines only, will be allowed upon written application of the property owner, subject, however, to the within specifications and in conformity with the rules and regulations above prescribed. Catch-basins for surface drainage only may be constructed of brick or vitrified pipe and shall be water tight, below the top of the outlet pipe, and trapped in such a manner as to prevent any solid substances from passing into the main drain. All other catch-basins shall be constructed of brick, circular in section and not less than three feet (3') internal diameter, and at least three feet ten inches (3'10") in depth, and to be two feet six inches (2'6") in the clear from the bottom of the basin, and trapped, the bottom of the basin to be six inches (6") below the bottom of the outlet pipe.
The brick work shall not be less than four inches in thickness, and set upon a bottom of one inch pine lumber, and when the bricks are laid flat, they shall not show more than four inches on the inner side of the basin, and laid in a workmanlike manner, thoroughly imbedded in cement, so as to make the basin water tight. The tops of the catch-basins shall be brought up to the surface of the ground, and shall be covered with a cover which shall be three feet eight inches (3'8") in diameter; this cover can be stone with an iron lid, or all iron, the cover to be subject to the approval of the Commissioner of Public Works. Manholes shall be constructed of brick and be not less than two feet six inches (2'6") inside diameter, and laid as above specified.