What do the blue lines on a Type 4 pump control panel graphic display indicate?

The blue lines on a Type 4 pump control panel graphic display indicate the pump discharge and fueling loop. This color coding is a standard practice used to help operators and maintenance personnel quickly identify different system components and their functions on the control panel.

In the context of fuel and water systems maintenance, the discharge lines are crucial as they transport the fuel to the desired location for usage or further distribution. Recognizing these lines helps ensure that operators can monitor fuel flow, manage pressures, and maintain safe operating conditions within the system. By accurately identifying the pump discharge and fueling loop through the blue lines, personnel can quickly address any issues that arise, perform necessary maintenance, and ensure efficient operation of the overall system.