If the low water cut off is not directly in the boiler, where can it be installed?

The low water cut-off is a critical safety device used in boiler systems to prevent low water levels, which can lead to overheating and potential equipment failure. If the low water cut-off is not mounted directly on the boiler, it is acceptable and effective to install it in the main supply line close to the boiler. This position allows the low water cut-off to monitor water levels effectively before they reach the boiler, ensuring that the system can react to the water level changes promptly and safely.

Positioning the cut-off in the main supply line allows it to accurately detect when water levels drop below safe operating conditions and subsequently shut down the burner to avoid damage. This installation is within manufacturer guidelines and industry standards, ensuring proper functioning and safety compliance.

In contrast, options like installing it in the gas line or control panel would not provide an effective means of monitoring water levels, as these locations are not involved in direct water flow or measurement. Likewise, placing it at the supply tank, while it might monitor water availability, does not provide immediate feedback on the water level that is critically needed right at the boiler for safety operations.