{"data":{"id":"us/49-cfr-192.373","jurisdiction":"us","citation":"49 CFR 192.373","heading":"Service lines: Cast iron and ductile iron.","body":"(a) Cast or ductile iron pipe less than 6 inches (152 millimeters) in diameter may not be installed for service lines.\n(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.\n(c) A cast iron or ductile iron service line may not be installed in unstable soil or under a building.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER D—PIPELINE SAFETY","PART 192—TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS","Subpart H—Customer Meters, Service Regulators, and Service Lines"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"baa0e9df60b9db14790be376129d61e386298a7be40466e6b4861a4c20d210b9","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-192.371","next":"us/49-cfr-192.375"},"notice":"GroundRules: Original legal text. Not legal advice."}