Which type of nozzle allows for flow settings?

The type of nozzle that allows for flow settings is the adjustable-gallonage nozzle. This nozzle is designed to provide firefighters with the flexibility to control the flow rate of water depending on the situation at hand.

Adjustable-gallonage nozzles typically feature a mechanism that allows the operator to vary the diameter of the water stream and, consequently, the volume of water being delivered. This is particularly useful in firefighting because different situations may require varied flow rates—sometimes a lower flow is sufficient for certain fire conditions, while at other times, a higher volume may be necessary to combat larger or more intense fires.

This capability of adjusting the flow settings enhances operational efficiency and helps conserve water while allowing responders to tailor their approach to the specific demands of the fire situation. In contrast, fixed-gallonage nozzles have a set flow rate, which does not allow for this level of operational flexibility or control. Low-pressure and high-pressure classifications refer to the operating pressure of the nozzle rather than its ability to adjust flow, making them less suitable for this particular criterion.