(a) In General.
(1) The plumbing system soil, waste and vent stacks shall be designed in accordance with the Ohio Basic Building Code (Plumbing), Sections 4101:2-51-55 and 4101:2-51-56 (refer to Appendix A).
(2) Building drain stacks and branch sizing shall be in accordance with the Ohio Basic Building Code (Plumbing), Table 4101:2-51-46. Vent stack minimum sizes and length of vents shall be in accordance with the Ohio Basic Building Code (Plumbing), Table 4101:2-51-56 (refer to Appendix A).
(3) Pipe materials that may be used for soil, waste and vent stacks shall be in accordance with Section 1381.03 of this Building Code.
(b) Specific Requirements.
(1) Soil or waste stacks shall be no smaller than the largest horizontal branch connected to the stack, except that a four by three-inch water closet connection shall not be considered a reduction in pipe size.
(2) Whenever floor drains or other plumbing fixtures are installed in a building for human occupancy, there shall be at least one stack not less than three inches in diameter which shall extend upward from the building drain to the outer air. See prescribed termination for stack vents below.
(3) No soil stacks shall be less than three inches in diameter and no waste stack shall be less than one and one-half inch in diameter.
(4) When the waste stack or vent receives the discharge of a kitchen-type sink, and also serves as a vent for a fixture connected to the horizontal branch served by the waste stack, the minimum size of the waste stack to the highest sink branch connection shall be two inches in diameter. Above the connection point, the vent size shall be governed by the total number of fixture units to be vented by the stack.
(5) All piping shall be securely and adequately supported. Vertical stacks shall be supported at the base and shall be secured at sufficiently close intervals to keep the pipe in alignment and carry the weight of the pipe and contents. Support for the pipe shall be secured without excessive strain on joints or connections and shall transmit the load to the building structure or to independent posts, piers or foundations. Building drains shall not be installed or arranged so as to support load from the vertical piping. Pipe supports shall be approved by the Building Inspector. Pipe hooks shall not be used as supports for piping that is more than one and one-half inches in diameter.
(6) Horizontal piping shall be supported at points sufficiently close to keep it in alignment and prevent sagging, in accordance with Section 1381.05.
(7) When an offset in a soil or waste stack is at an angle greater than four degrees to the vertical, no horizontal branch shall connect within two feet above or below the offset.
(c) Vents and Vent Stacks.
(1) Vents shall be of a size and installed in accordance with Sections 4101:2- 51-56 through 4101:2-51-65 of the Ohio Basic Building Code (Plumbing) (refer to Appendix A).
(2) Vent terminals shall not be located on the front slope or a street side slope of the building, and the vent terminals shall not be used for the purpose of attaching or anchoring flagpoles, television aerials or similar devices.
(3) No soil, waste or vent pipe extensions of a building shall be run or placed outside of a wall, but shall be carried inside of the building. There shall be no terminations below a roof overhang.
(4) Vent extensions and vent terminals shall be no less than four inches in diameter. A change in diameter, if required, shall be made at least one foot below the roof connection. Copper vent terminals are prohibited.
(5) Vent pipes shall be supported so as to be free from droops or sags, and installed to drip back to the stack into which they are connected.
(Ord. 1992-101. Passed 1-14-92.)