What is the flow rate (GPM) and nozzle pressure (NP) for a 15/16" hand line tip?

The flow rate of 185 GPM at a nozzle pressure of 50 psi for a 15/16" hand line tip is supported by the principles of fluid dynamics that govern nozzle performance. This size hand line tip is designed to deliver a specific amount of water flow based on its diameter and the pressure applied.

The flow rate is determined primarily by the nozzle size and the discharge pressure. For a 15/16" nozzle, empirical formulas and flow-testing data consistently indicate a flow of around 185 gallons per minute when operated at a pressure of 50 psi. This flow rate is ideal for various firefighting operations, providing a substantial volume of water that can effectively suppress fires while still being manageable for firefighters.

Moreover, maintaining nozzle pressure at 50 psi is essential as it balances the need for adequate reach and penetration of water with manageable operational control for personnel on the scene. This combination ensures efficient firefighting while maintaining the safety and effectiveness of the hand line operation.

The other options present flow rates that either exceed or undercut the expected values typically recorded for a 15/16" tip, illustrating the precise nature of effective firefighting equipment configurations.