Friction Loss Calculator
Enter the hose diameter, hose length & GPM into the friction loss calculator & press "Calculate".
200 ft of 1.5 inch hose with 120 GPM has 69.12 PSI friction loss.
Friction Loss Explained
Friction loss occurs when water passes through a hose. Hose length, diameter, and GPM (volume) all affect friction loss. As water passes through a hose, friction between the water and the inside surface of the hose causes turbulence, which slows the water. The results in a PSI drop at the other end of the hose. The higher the gpm passing through a hose, the more turbulance and friction loss will result.
Additional Fire Engine Operator Tools
The FireDepartment.net staff have designed additional fire training tools:
- Friction loss calculator
Quickly solve friction loss (
Ex: 200 ft 1 3/4" hose with 200 gpm & 200 ft 2 1/2" hose with 200 gpm)
- Friction loss tables
List of printable friction loss tables for all common hose sizes
Ex: 1 3/4" Friction Loss Table & 2 1/2" Friction Loss Table
- Friction loss cheat sheet
Compact friction loss table for hose sizes & gpm combo. Limited to 100' increments & larger jumps between gpm.
- Friction loss formula
Math formula to solve friction loss. Effective, but more time consuming & error prone.
- Instructions on calculating pump discharge pressure
Learn pump pressure management combining elevation change, hose friction loss & appliance friction loss.
- Pump and plumbing diagram
Visual tool to map a fire engine's pump and plumbing. Follow the water to learn how the pump, valves and plumbig work together to deliver water to the fire.
FireDepartment.net strives to provide fire departments & firefighters with quality tools. But, the user takes full responsiblity for the information contained above. Use at your own risk!