What does the term 'FL' refer to in the context of pumping?

The term 'FL' in the context of pumping unequivocally refers to Friction Loss. Friction loss occurs when water flows through hoses, pipes, and fittings, leading to a reduction in pressure due to the resistance the water encounters. This resistance is influenced by factors such as the diameter of the hose, the length of the hose, and the flow rate of the water.

Understanding friction loss is crucial for efficient fireground operations, as it allows Driver Engineers to calculate the necessary pump pressure to ensure that enough water is delivered to the nozzle or discharge point while compensating for any losses that occur due to friction. By mastering the concept of friction loss, firefighters can better evaluate and manage their pumping operations, ensuring effective fire suppression.