Each table helps you quickly & easily find friction loss for most common fire hose sizes (3/4", 1", 1.25", 1.5", 1.75", 2", 2.5", 3", 3.5", 4", 4.5", 5" & 6"). Print 2 or 3 tables for your most used hose sizes & you'll probably have everything you'll ever need. Click on any image (below) to see a larger printable friction loss table.
Friction Loss Explained
Friction loss occurs when water passes through a hose. Hose length, diameter, and GPM (volume) all affect friction loss. As water passes through a hose, friction between the water and the inside surface of the hose causes turbulence, which slows the water. The results in a PSI drop (pressure loss) at the other end of the hose. The higher the gpm passing through a hose, the more turbulence and friction loss will result.
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