What is the flow rate (GPM) and nozzle pressure (NP) for a 1 1/2" master stream tip?

The flow rate for a 1 1/2" master stream tip is typically set at 600 gallons per minute (GPM) when the nozzle pressure is at 80 pounds per square inch (psi). This is aligned with standard practices in fire service regarding consistent and effective performance of nozzle streams. The nozzle pressure of 80 psi is commonly used because it optimally balances both the reach and pattern of the water stream, providing adequate penetration and distribution to combat fires effectively.

Additionally, the specifications for master streams consider the necessary pressure to maintain the flow rate while ensuring the safe operation of the fire apparatus and nozzle. The combination of the specified flow rate and nozzle pressure is designed to facilitate the most efficient and effective firefighting operations with that nozzle size.

In this context, the flow rate and nozzle pressure for a 1 1/2" master stream are critical for the operation of the equipment and for ensuring that firefighters can effectively manage fire scenarios.