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Find a Fire Department
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Fire hose Friction loss Calculator Instructions
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Enter the fire hose diameter, the gallons per minute (GPM), and the hose length, into
the Friction Loss Calculator and then press the submit button. This
Friction Loss Calculator will determine the Friction Loss for one section of
hose for the specified length, GPM, and hose diameter.
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Fire Hose Friction Loss Calculator
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Fire Hose Diameter (in inches) |
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GPM (Gallons Per Minute) |
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Hose Length (in feet) |
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Friction Loss (PSI)
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Friction Loss Calculations Explained:
Friction loss occurs when water passes through a stationary hose or pipe.
Distance, diameter, and the GPM / volume, all affect friction loss. As water
passes through the fire hose, turbulence (friction) develops between the
moving water and the inside surface of the fire hose. This turbulence reduces the
PSI at the other end of the hose opposite to the pump.
Fire Hose Friction Loss calculations are an important factor in
determining pump discharge pressure.
Pump discharge pressure is the pressure you set your pump in order to compensate
for friction loss in the fire hose and elevation change.
This Friction Loss Calculator is a good firefighter learning tool and for friction loss calculations in the office or classroom. In the field,
you'll want to use either the
Friction Loss Chart,
Friction Loss Slide Rule, or
Friction Loss Formula. Each of these methods
have positive and negative aspects.
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