Iowa Admin. Code r. 875-93.6 - [Effective until 3/26/2025] Water gages
(1)
Miniature power boilers for operation with a definite water level shall be
equipped with a glass water gage for determining the water level. The lowest
permissible water level for vertical boilers shall be at a point one-third of
the height of the shell above the bottom head or tube sheet. When the boiler is
equipped with an internal furnace, the water level shall not be less than
one-third of the length of the tubes above the top of the furnace tube sheet.
In the case of small boilers operated in a closed system where there is
insufficient space for the usual glass water gage, water level indicators of
the glass bull's eye type may be used.
(2) Miniature power boilers shall have the
lowest visible part of the water gage glass located at least 1 inch above the
lowest permissible water level specified by the manufacturer.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
(1) Miniature power boilers for operation with a definite water level shall be equipped with a glass water gage for determining the water level. The lowest permissible water level for vertical boilers shall be at a point one-third of the height of the shell above the bottom head or tube sheet. When the boiler is equipped with an internal furnace, the water level shall not be less than one-third of the length of the tubes above the top of the furnace tube sheet. In the case of small boilers operated in a closed system where there is insufficient space for the usual glass water gage, water level indicators of the glass bull's eye type may be used.
(2) Miniature power boilers shall have the lowest visible part of the water gage glass located at least 1 inch above the lowest permissible water level specified by the manufacturer.