(1) Corrugated steel pipe and couplings shall be certified to CAN/CSA-G401, “Corrugated Steel Pipe Products”.
(2) Corrugated steel pipe shall only be used underground outside a building in a storm drainage system.
(3) Couplings for corrugated steel pipe shall be constructed so that when installed they shall,
(a) maintain the pipe alignment,
(b) resist the separation of adjoining lengths of pipe,
(c) prevent root penetration, and
(d) prevent the infiltration of surrounding material.