The Hazen-Williams pressure loss equation is used worldwide to calculate the pressure loss in fire sprinkler systems, wet risers, fire hydrant systems, and many other fire protection systems, including low-pressure water mist.

This online k factor calculator is able to find the flow, pressure or k factor from a sprinkler head or a water mist nozzle be using the K factor formula. This is the starting point for most water-based fire protection design and calculations. We can use this formula for any device for which we have a k factor and that can be a sprinkler, nozzle, water cannon, foam pourer and many other devices. 

Looking to calculate the velocity in a pipe or determine the diameter of a pipe then this Pipe Velocity Calculator is for you.