Regulations last checked for updates: May 13, 2024

Title 49 - Transportation last revised: May 09, 2024
§ 230.51 - Number and location.

Every boiler shall be equipped with at least two water glasses. The lowest reading of the water glasses shall not be less than 3 inches above the highest part of the crown sheet. If gauge cocks are used, the reading of the lowest gauge cock shall not be less than 3 inches above the highest part of the crown sheet.

source: 64 FR 62865, Nov. 17, 1999, unless otherwise noted.
cite as: 49 CFR 230.51