4715.0570 SOIL AND WASTE PIPING UNDERGROUND OR EMBEDDED.
For soil and waste piping, except special wastes, underground or embedded in masonry construction the following materials may be used:
Cast iron 1A or 1B and fittings, and hubless cast iron 1K;
Cast iron 1C or 1D with 1E fittings;
Steel pipe 2C(b), stainless;
Lead 4A pipe with wiped joints, fittings 4C; and
Plastic 6A, 6B(1), 6B(2), 6B(3), or 6B(4) and corresponding fittings must be laid on a continuous granular bed. Installation must comply with ASTM D2321.