What kind of connections should be avoided for low-water cut-off installations?

In low-water cut-off installations, avoiding ferrous connections is important because ferrous materials, which contain iron, are prone to rust and corrosion when exposed to water or steam. This deterioration can lead to leaks and potential system failures, compromising the reliability of the low-water cut-off device.

The function of a low-water cut-off is to prevent boiler run-dry conditions, and any compromise in its integrity could lead to unsafe operating conditions. Corrosion can build up over time, creating blockages and affecting the performance of the cut-off device. Therefore, using non-ferrous materials, such as brass or bronze, is often recommended for such installations because they are more resistant to corrosion and will last longer under the demanding conditions present in boiler systems.

Non-metallic, soldered, and welded connections might be chosen based on their specific characteristics or applications, but the primary concern with ferrous connections is their vulnerability to rust, which directly undermines the effectiveness and safety of the low-water cut-off.