Fire Hose Friction Loss Cheat Sheet - Divide by 2.3 (2.3 is the amount of lift (in feet) that 1psi. Web np = nozzle pressure. Elev = elevation loss or gain. Web friction loss is determined by the gpm flowing, the size of the hose and the length of the hose. Add lift and friction loss together 4. App = appliance friction loss. Determine the friction loss in the intake hose used 3. Loss of pressure created by the turbulence of water moving against the interior walls of fire hose or appliances. Web determine the lift (in feet) 2. Some figures may be used more than once;
Some figures may be used more than once; Elev = elevation loss or gain. Divide by 2.3 (2.3 is the amount of lift (in feet) that 1psi. App = appliance friction loss. Most of the fog nozzles have. All three factors must be considered. Web np = nozzle pressure. Determine the friction loss in the intake hose used 3. Add lift and friction loss together 4. Web friction loss is determined by the gpm flowing, the size of the hose and the length of the hose. Web determine the lift (in feet) 2. Loss of pressure created by the turbulence of water moving against the interior walls of fire hose or appliances.