Check our our article in the Summer 2022 Edition of the American Boiler Manufacturers Association publication, Today's Boiler: Don't Lose Sight of Your Water Level with Cloudy Gage Glass.
Operators know the importance of monitoring the water level information on boilers, deaerators, feedwater tanks, blowdown tanks, and condensate tanks in their plants. We observe many level gages on boiler installations that are meticulously and properly maintained with excellent service life. However, enabling a gage glass on these vital applications to become cloudy or neglected to the point that an operator is unable to determine the water level is unacceptable. A gage glass is required on every power boiler that is constructed to meet the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. The purpose of the gage glass is to provide a ready, visual determination of the water level at the boiler. The gage glass may also serve as a referee to resolve a dispute between multiple level transmitters they are not displaying similar level indications.