US lawNorth DakotaRegulationsTitle 33.1 — Department of Environmental QualityArticle 33.1-14 — North Dakota Boiler RulesChapter 33.1-14-07 — Miniature Boilers Miniature Boilers - Existing Installations33.1-14-07-09NDAC 33.1-14-07-09Stop valvesLast amended: 2020Year: 2026Length: 42 wordsOfficial source Cite as N.D. Admin. Code § 33.1-14-07-09The steam piping from a miniature boiler must be provided with a stop valve located as close to the boiler shell or drum as is practicable, except in those cases where the boiler and steam receiver are operated as a closed system.PreviousNDAC 33.1-14-07-08NextNDAC 33.1-14-07-10