(A) Pipes. All pipe used for the installation, extension, alteration or repair of any house gas piping shall be of standard weight and standard dimension wrought iron or steel pipe, in buildings, and plastic pipe as described under division (E) of this section, and such pipe shall either be new or all such pipe shall be free from internal obstructions, splits or other imperfections which would render it unfit for the purpose intended and the ends thereof shall be properly reamed.
(B) Fittings. All fittings used in connection with the house gas piping shall be of malleable iron. The use of cast iron fittings is prohibited. Connections between metallic and plastic piping shall be made outside of buildings, underground. When connecting plastic to a metallic riser, there shall be a minimum 12 inch horizontal length of metallic pipe, underground, at the end of any plastic piping installed, and such section of metallic piping shall be suitably protected against corrosion. The metallic piping must be of adequate length and size so that no stress or strain is placed on the plastic piping. The connection between the metallic piping and the plastic piping shall be a mechanical joint type, or plastic to steel transition fitting as recommended by the plastic piping manufacturer.
(C) Joints. All joints between pipe and fittings, unless welded, shall be screwer joints (American standard pipe thread). Such joints shall be made up with white lead or other suitable thread compound.
(D) Unions. All unions used in house piping shall be ground joints types. Right and left nipples and couplings are permissible.
(E) Plastic piping. Plastic piping must be buried underground for its entire length, and may not be used within or under any building or slab, and shall bear the ASTM D 2413.
(Prior Code, § 9-2-8) Penalty, see § 150.999