The Utica-Dunkirk 14622005 11" Glass Water Gauge Set is a durable water level indicator designed to provide accurate visual monitoring of water levels in boiler systems. It works by allowing water to rise and fall within the transparent glass tube, giving operators a clear, real-time view of the boiler's water level for safe and efficient operation. Commonly used in Utica and Dunkirk ... https://www.partshnc.com/11-glass-water-gauge-set