§ 86-207. Stacks.

(a)

All stacks shall extend full size through the roof. All stacks shall be substantially supported and shall be provided with floor rests or other substantial supports at intervals of floors or ten feet. Horizontal piping shall be supported at intervals not to exceed ten feet. Horizontal cast iron pipe shall be supported at intervals of not more than five feet. Lead, copper and like piping shall be adequately supported to prevent sagging. All pipe supports shall be made of heavy iron posts, wall hangers or brackets and concrete or masonry piers.

(b)

Size shall be determined by the number of fixtures connected to the stack. If the pipe grade is 45 degrees or more, the same unit capacity as for vertical stacks will be permissible. The minimum stack size shall be three inches. A long sweep one-quarter bend, two one-eighth bends, or a Y and one-eighth or one-sixth bend, or its equivalent, shall be used at the base of all stacks. When such fittings constitute the connection between a stack and drain, and the drain is of larger size than the stack served, the increase shall be made at the union of the stack and base fittings, and no such bend or fitting shall be less than four inches in diameter.

(Code 1966, § 10.72)