Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
1.425
Velocity (ft/sec)
2.41
SIDR · All PSI · 3/4" · 4 GPM
SIDR · All PSI · 3/4" · I.D. 0.824" · 4 GPM · 1.425 PSI Loss per 100 ft · 2.41 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.