Pump Head & NPSH Calculator
Flow Rate
Flow Value
Flow Units
m³/h
L/s
GPM
Pipe
Pipe Diameter (mm)
Pipe Material
Carbon Steel (C=120, ε=4.5E-5m)
Galvanized Steel (C=110, ε=0.00015m)
Stainless Steel (C=125, ε=1.5E-5m)
Copper (C=130, ε=1.5E-6m)
PPR (C=150, ε=3.0E-6m)
PVC (C=150, ε=1.5E-6m)
HDPE (C=145, ε=3.0E-6m)
Pipe Length (m)
90° Elbows (qty)
Valves (qty)
Equipment Losses (m)
Static Head (m)
Formula
Hazen–Williams
Darcy–Weisbach
Safety Factor (%)
Suction Line & NPSH
Suction Pipe Length (m)
90° Elbows (Suction)
Valves (Suction)
Water Level Above Pump (m)
Water Temperature (°C)
Assumption: Open tank at atmospheric pressure
Calculate