What is the approximate flow from a 1-inch nozzle tip with a nozzle pressure of 50 psi?

To determine the flow rate from a 1-inch nozzle tip at a nozzle pressure of 50 psi, one can apply the formula for calculating flow through a nozzle, which is generally expressed as:

[ \text{Flow (GPM)} = C \times D^2 \times \sqrt{P} ]

Where:

• C is a constant that varies based on the nozzle design (typically around 29 for smooth bore nozzles),

• D is the diameter of the nozzle in inches,

• P is the nozzle pressure in psi.

For a 1-inch nozzle at 50 psi, the flow rate can be approximated using the commonly referenced value for a 1-inch nozzle. It is known that a 1-inch nozzle at approximately 50 psi typically flows around 210 gallons per minute (gpm). This consistency with established flow rate data makes the value a reliable reference when working with various fire apparatus scenarios.

The other flow rates listed do not align closely with standard calculations for a 1-inch nozzle at that pressure, reinforcing that 210 gpm is the most accurate answer based on industry knowledge and practical application. Understanding these standardized figures is crucial for effective fireground operations, ensuring optimal water delivery and effective fire suppression efforts.