Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
0.139
Velocity (ft/sec)
1.49
DR-11 · 200 PSI · 3" · 30 GPM
DR-11 · 200 PSI · 3" · I.D. 2.864" · 30 GPM · 0.139 PSI Loss per 100 ft · 1.49 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.