How frequently should the low water cut-off be tested?

The low water cut-off is a critical safety device in boiler operations. Its primary function is to prevent the boiler from operating without sufficient water levels, which can lead to overheating and possible damage or failure of the boiler. Regular testing of this device is essential to ensure it is functioning properly and can perform its safety role.

Testing once per day is mandated by law in many jurisdictions, as this ensures that the safety mechanism is operational and can respond effectively to low water conditions. In addition, testing it once per shift is recognized as best practice by many industry standards and operators. This frequency helps ensure that any potential issues can be identified and addressed promptly, minimizing the risk of unsafe operating conditions.

While testing less frequently may be allowable under certain circumstances, such as once a week or once a month, these intervals increase the risk of a failure in the safety system going undetected. The rigorous approach of daily testing reflects an increased emphasis on safety and reliability in boiler operations.