What do blue lines represent on the Type 3 pump control panel line drawing?

The blue lines on the Type 3 pump control panel line drawing indicate pump discharge. This representation is essential for understanding the system's layout and functions because it visually distinguishes the pathways through which the water is pumped out to the distribution system. The pump discharge lines are crucial for ensuring that the system can effectively deliver water to various points, whether for firefighting or other operational needs.

In fluid dynamics and water systems management, visual indicators like line colors help technicians and operators quickly identify different system components and flows. Recognizing what the blue lines represent allows personnel to troubleshoot and maintain the system more effectively, ensuring optimal performance and safety in operations.