Where must the water column be located in a boiler?

The water column in a boiler is required to be positioned at the normal operating water level. This specific location is crucial because it serves as the reference point for the water level within the boiler, allowing for accurate pressure and water level readings. When the water column is situated at the normal operating water level, it effectively communicates the actual water level to the gauge glass, ensuring that operators can monitor the water level accurately and take necessary actions to maintain safe and efficient operation.

Placing the water column at the normal operating level enables the system to function correctly, as it ensures that the measurements reflect the state of the boiler's water content during regular operation. This is vital for maintaining the balance between steam production and water levels, which are both essential for the safe and efficient operation of the boiler.