5703.6.2.1 Special materials.
FC § 5703.6.2.1
Low-melting-point materials, such as aluminum, copper or brass, that soften on fire exposure, such as nonmetallic materials, and nonductile material, such as cast iron, shall be acceptable for use underground only in accordance with the applicable standard listed in FC Table 5703.6.2. Aboveground piping system components shall be constructed of Schedule 40 steel or a higher schedule steel.













