Code of Federal Regulations · Section
§ 192.373 — Service Lines: Cast Iron And Ductile Iron
49 C.F.R. § 192.373
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(a) Cast or ductile iron pipe less than 6 inches (152 millimeters) in diameter may not be installed for service lines.
(b) If cast iron pipe or ductile iron pipe is installed for use as a service line, the part of the service line which extends through the building wall must be of steel pipe.
(c) A cast iron or ductile iron service line may not be installed in unstable soil or under a building.
Authorizing Statute
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Rights-of-way for pipelines through Federal lands30 U.S.C. § 185
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General regulatory authority49 U.S.C. § 5103