What is the primary function of a low water cutoff on a boiler?

The primary function of a low water cutoff on a boiler is to ensure safe operation without sufficient water. This device acts as a safety mechanism, detecting when the water level in the boiler falls below a predetermined level. If the water level drops too low, the low water cutoff will activate to either shut down the boiler or prevent it from operating. This is crucial because operating a boiler without enough water can lead to overheating, damage to the boiler, or even catastrophic failure such as a steam explosion.

Maintaining safe water levels helps protect the integrity of the boiler and ensures safe operation, which is essential for both equipment longevity and personnel safety. Other options, while related to boiler functions, do not address the critical safety aspect that the low water cutoff specifically provides.