What is the lowest part of a water gauge supposed to be positioned above?

The lowest part of a water gauge is required to be positioned above the lowest part of the boiler for several safety and operational reasons. In this case, placing the gauge at a minimum of 2 inches above the lowest part of the boiler helps ensure that the water level is accurately reflected. This positioning reduces the risk of the gauge becoming a trap for sediment or debris, which could occur if it were located too low.

Maintaining this distance allows for proper water flow and visibility of the water level, which is critical for the safe operation of the boiler. Additionally, a gauge that is positioned lower than this minimum may not provide an accurate measurement of the water level because it could easily become affected by the accumulation of sludge, leading to potential operational hazards.

This requirement aligns with standard safety practices in boiler operation to ensure reliable monitoring and control, ultimately promoting safe and efficient boiler performance.