§230.51. Number and location.
49 C.F.R. § 230.51
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.
Notes, amendments, and revision history
Authority
Authority: 49 U.S.C. 20103, 20107, 20702; 28 U.S.C. 2461 note; and 49 CFR 1.89.
Source
Source: 64 FR 62865, Nov. 17, 1999, unless otherwise noted.