What is the expected flow rate from the 1 3/8" tip?

The expected flow rate from a 1 3/8" tip is typically calculated based on nozzle pressure and the diameter of the tip. A general rule of thumb in firefighting nozzle design is that for every inch of diameter, approximately 100 GPM can be expected at a standard pressure of 100 PSI.

For a 1 3/8" tip, which translates to 1.375 inches in diameter, you can multiply the inch diameter by 100 GPM to arrive at the expected flow rate. This calculation yields about 137.5 GPM when using an exact diameter measurement; however, in practice and for ease of use in the field, it often rounds to more standard figures based on nozzle type and other factors.

In this case, industry standards and empirical data approximate the flow from a 1 3/8" tip at around 500 GPM, which aligns with both training and practical applications in firefighting scenarios. This flow rate is adequate for various fire suppression tasks while ensuring that the operator can manage the equipment effectively and efficiently.