Commercial 2.5 for DOS - Version 2.5 Computer software for the design and hydraulic calculation of fire sprinkler systems. Pipe Network Connectivity and error checking. K-Factor and Pipe Diameter list boxes are fully editable. Spreadsheets, menus, icons, tool bar for rapid data entry & editing. Fittings expressed as letter symbols ( EE, 2E, 2T, ... ) or pipe length. Friction losses calculated using the Hazen-Williams equation. Equivalent Length and C-Factor automatic retrieval and display. Grid Estimator with Automatic Peaking of the Most Remote Area. Pipe Table Editor, Velocity Analyzer, Equivalent-K Calculator. Booster pumps automatically selected. User Manual, US or Metric Units. Microsoft DOS & Windows 3.1/95/98/NT, 1 MB RAM, 1 MB on HD. Sprinkler Calcs per NFPA 13,15,231-C.