0.75 Inch Hose - Friction Loss Table

This chart is designed (using the friction loss formula) to find quick and accurate answers for 3/4" fire hose friciton loss. To find the friction loss for a 100 foot section of fire hose, find the column with the desired GPM and to its right you'll see the corrosponding friction loss. You can also print this image on a 8.5x11 sheet of paper.

Example: Friction loss for 100 ft of 3/4" fire hose with 25 GPM is 68.8. You can find the corrosponding friction loss for 25 gpm at the bottom of column 2 in the chart below. You can see that 25 gpm has 68.6 psi friction loss. You can also see theanswer on the friction loss calculator

As you can see, 3/4" fire hose has very limited capacity and builds friction loss at a very low GPM. Be careful where you use 3/4 inch fire hose.

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.