Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
0.520
Velocity (ft/sec)
1.93
SIDR · All PSI · 1-1/4" · 9 GPM
SIDR · All PSI · 1-1/4" · I.D. 1.380" · 9 GPM · 0.520 PSI Loss per 100 ft · 1.93 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.