US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-150C — COMMERCIAL COACHES296-150C-1360WAC 296-150C-1360WAC 296-150C-1360. Gas piping—Piping designLast amended: 1996Year: 2026Length: 28 wordsOfficial source Commercial coaches requiring fuel gas for any purpose must be equipped with a gas piping system that is designed for LPG only or combination LPG and natural gas.PreviousWAC 296-150C-1350NextWAC 296-150C-1370