Sec.29-232-74. Gage glass and water level indicator  


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  • Each miniature boiler shall be equipped with a water gage glass for determination of water level. The lowest permissible water level shall be at a point one-third of the height of the shell, except where the boiler is equipped with an internal furnace, in which case it shall not be less than one-third of the tube length above the top of the furnace. For small boilers where there is insufficient space for the usual type of gage glass, water level indicators of the glass bull's eye type may be used.

(Effective August 25, 1987)