US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-150C — COMMERCIAL COACHES296-150C-1430WAC 296-150C-1430WAC 296-150C-1430. Gas piping system openingsLast amended: 1996Year: 2026Length: 18 wordsOfficial source All openings in the gas piping system must be closed gas-tight with threaded pipe plugs or pipe caps.PreviousWAC 296-150C-1420NextWAC 296-150C-1440