This simple iPhone / iPod Touch app calculates friction loss based on the coefficient for hoses of diameter 3/4" to 6", hose length, gallons per minute, and optionally, number of appliances. An estimated PSI of 5.0 per appliance is used in calculations.

* * DISCLAIMER: Users who have tried it have not reported any errors. However, before using this calculator for any purpose, please test it versus your department's approved calculations. By acquiring this product, you agree to assume all responsibility for determining the product's suitability for any use, and assume all liability for any possible damages consequential to use of this product in lieu of other methods of making these calculations.