To take a glance at all pocketEngineer software and OS requirements, click Software List.

A quick and simple method for calculating the hydrant's residual pressure and flow using a set of flow test results is desired for planning and design purposes. 

This program provides a straightforward yet efficient method for figuring out the residual pressure and flow of a hydrant. Plotting the flow and pressure graph in either linear or Q^1.85 scale is an option. There's no need to look for the manual Q^1.85 graph in NFPA 291. 

Built-in selection features:

• Calculations using Hazen-Williams (Q^1.85), or Darcy-Weisbach (Q^2) formula.

• Graph plotting in Q^1.85 scale (for Hazen option only), or linear scale.

• Units available in lpm-bar, or gpm-psi.

NFPA 291: 2019 (Section 4.3.6): "To obtain satisfactory test results of theoretical calculation of expected flows or rated capacities, sufficient discharge should be achieved to cause a drop in pressure at the residual hydrant of at least 25 percent, or to flow the total demand necessary for firefighting purposes." 

The results can be printed and saved in pdf file.  Graph can be saved as image file.

Download here for sample report of results in pdf file.

Final Thought: Inspiring me to use digital solutions,  I no longer need to hand charting of the Q^1.85 graph on a printed copy in today's digital environment. 

For fire sprinkler hydraulic calculation with schematic diagram, see tFIRE (Windows).

For fire sprinkler design and check tools, see aSprinkler (Android).

For pressure drop calculations, see ePF Loop (Windows)