What is the danger of operating a boiler without a properly functioning low-water cutoff?

Operating a boiler without a properly functioning low-water cutoff presents significant dangers, primarily because the low-water cutoff is a critical safety device designed to prevent the boiler from running dry. If the water level drops too low, the boiler can overheat, leading to catastrophic failures. When there is insufficient water to absorb the heat generated in the boiler, the metal components can overheat and become damaged, potentially leading to cracks, ruptures, or even an explosion. This is particularly dangerous because such an event can result in severe injuries or property damage.

While airlocks, inefficient fuel usage, and overproduction of steam are issues that can arise in boiler systems, they do not pose the immediate life-threatening risks that arise from a lack of proper water levels. Hence, the primary concern with not having a functioning low-water cutoff is the risk of boiler damage or explosion, which underscores the critical importance of this safety feature in boiler operation.