What is the only component that can be tapped onto a low water cut out?

The only component that can be tapped onto a low water cut out is a drain. A low water cut out is a critical safety device designed to prevent a boiler from operating when the water level falls below a safe threshold. This helps eliminate the risk of overheating and potential boiler damage or failure.

Having a drain on the low water cut out allows for the safe removal of water and sediment from the boiler. This ensures that the cut out can accurately assess the water level and function correctly, maintaining operational safety. Draining the boiler when necessary also assists in proper maintenance and ensures the longevity and reliability of the boiler system.

Other components, such as pressure relief valves, feedwater lines, and safety valves, are essential in boiler operations but serve different functions. For instance, pressure relief valves are used to manage excess pressure within the boiler, while feedwater lines are responsible for supplying water back into the boiler. Safety valves protect the system from pressure overload, but none of these elements are intended to be tapped onto a low water cut out.