What unit of measurement is commonly used for fire pump discharge pressure?

The commonly used unit of measurement for fire pump discharge pressure is pounds per square inch (psi). This measurement specifically relates to the pressure exerted by the water being discharged from the pump. Firefighting operations rely on accurate pressure readings to ensure that hoses and equipment are functioning effectively and delivering sufficient flow to combat fires.

Pressure is critical in firefighting because it affects the reach and effectiveness of the water being applied. Measuring discharge pressure in pounds per square inch provides a standard way to communicate and understand how much force is available to push water through hoses and nozzles, which is essential for efficient firefighting efforts.

Other units of measurement, such as gallons per minute or liters per second, are relevant in measuring flow rates—the volume of water being delivered—but do not address the pressure behind that flow. Similarly, cubic feet per hour is not applicable in the context of discharge pressure as it pertains to volume over time rather than the force being exerted.