[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.51]

[Page 385]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230_STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of 
Contents
 
                   Subpart B_Boilers and Appurtenances
 
Sec. 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.