Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
3.975
Velocity (ft/sec)
4.95
DR-11 · 200 PSI · 1" · 14 GPM
DR-11 · 200 PSI · 1" · I.D. 1.075" · 14 GPM · 3.975 PSI Loss per 100 ft · 4.95 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.