Classic version of the popular friction loss calculator for firefighters and pump operators. Easy to use pre-set drop down menus allow the user to pick Hose size / Coefficients, gallons per minute based on popular tip sizes and hose lengths in 50' increments up to 2000 feet. The previous version of this app had over 23000 downloads. This version is improved with 50 foot hose segments, more GPM's to choose from and a lighter foot print. Use for training and for studying. The drop downs contain all the information you need to learn fire hydraulics and friction loss calculations. This calculator doesn't do total pressure loss or total pump discharge pressure. I may add that feature later but I'm not sure it is needed for a simple light weight friction loss calculator.