Smooth-bore nozzles on elevated master streams should be limited to a nozzle pressure of?

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Smooth-bore nozzles on elevated master streams are designed to deliver water effectively for firefighting operations, particularly when high flow rates and reach are necessary, such as from a ladder or an aerial device. The recommended nozzle pressure for smooth-bore nozzles is typically around 80 psi. This pressure serves as an optimal level that balances effective stream reach and penetration with manageable operator control.

Operating at this pressure allows the nozzle to produce larger stream diameters, ensuring that the water reaches its intended target while also minimizing the risk of nozzle kickback and improving stability. The elevated position of the nozzle demands a careful approach to the pressure settings, as too high a pressure can lead to difficulties in handling and control, potentially compromising safety on the scene.

Setting the pressure at 80 psi maximizes the effectiveness of the water stream while also adhering to safety protocols for the personnel managing the elevated stream.

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