What is the maximum PSI when pumping to 5" hose?

The maximum PSI when pumping to 5-inch hose is set at 200 PSI. This value is established based on the design and flow capabilities of the 5-inch hose, which is meant to be efficient in delivering large volumes of water to support firefighting operations.

Pumping at 200 PSI allows for a good balance between adequate flow rates and manageable pressure within the hose, ensuring that firefighters can effectively combat fires without risking hose failure or operational inefficiencies. The increased diameter of the hose allows it to handle larger volumes of water, and the specified pressure is optimal for achieving the necessary flow rates when operating in field conditions.

Determining the PSI for pumping also involves considering safety margins, friction loss in the hose for longer stretches, and the overall operational capabilities of the fire apparatus. Therefore, adhering to the 200 PSI standard helps ensure effective firefighting while maintaining safety.