Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
0.391
Velocity (ft/sec)
1.41
DR-11 · 200 PSI · 1" · 4 GPM
DR-11 · 200 PSI · 1" · I.D. 1.075" · 4 GPM · 0.391 PSI Loss per 100 ft · 1.41 ft/sec
Values are calculated using the Williams-Hazen formula (C = 150) and are provided for reference only. Interstate Plastic, Inc. makes no warranty as to accuracy or fitness for any particular use. Consult a licensed engineer for system design.