What is the primary reason for maintaining proper water levels in a boiler?

Maintaining proper water levels in a boiler is crucial primarily to prevent low water conditions, which can lead to significant damage. When the water level drops below the safe operating range, the boiler can overheat because the water acts as a coolant for the metal components. Without adequate water, the heat generated can cause metal fatigue, warping, or even catastrophic failures like explosions. This situation can affect the structural integrity of the boiler and lead to costly repairs or replacement. Ensuring the water level is maintained helps protect the system, ensures safe operation, and enhances the longevity of the equipment.

While some options touch on related concepts, they do not address the immediate risks and safety concerns associated with low water levels in a boiler, making the focus on preventing low water conditions the most critical reason for maintaining proper water levels.