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4.4.10. High Level Control Valve (Pan-Type) (124AF). Figure 4.7 shows this valve. It shuts down
fuel receipts into the tank when a predetermined level, typically 279 millimeters (11 inches) from the
top of the tank, is reached. Maintenance frequencies are noted in Chapter 10.
Figure 4.7. High-Level Shutoff Valve (124AF).