For Differential Pressure, choose your preferred units from: kPa, psi, bar, cmH2O, IWGA (inches water gauge), Ft HD (feet head) or Pa.
For Flow, choose your preferred units from: l/s, l/m, l/h, USGPM, UKGPM, m3/h, m3/m or m3/s.
For Velocity, choose your preferred units from m/s or f/s.