Table § 18-29-712.4.1

Minimum Capacity of Sewage Pump or Sewage Ejector

Diameter of the Discharge Pipe (inches)	Capacity of Pump or Ejector (gpm)
2	21
2 1/2	30
3	46

For SI: 1 inch = 25.4 mm, 1 gpm = 3.785 L/m.