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 (pressure loss) at the other end of the hose. The higher the gpm passing through a hose, the more turbulance and friction loss will result.

Fire Engine Operator Tools

**Friction loss calculator**

Quickly solve friction loss for any length, GPM & hose sizes.

Ex: 200 ft 1 3/4" hose with 150 gpm & 200 ft 2 1/2" hose with 300 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.