18-29-712.4.1 Capacity.

   A sewage pump or sewage ejector shall have the capacity and head for the application requirements. Pumps or ejectors that receive the discharge of water closets shall be capable of handling spherical solids with a diameter of up to and including 2 inches (50 mm). Other pumps or ejectors shall be capable of handling spherical solids with a diameter of up to and including 1 inch (25 mm). The minimum capacity of a pump or ejector based on the diameter of the discharge pipe shall be in accordance with Table 18-29-712.4.1.

   Exception: Grinder pumps or grinder ejectors that receive the discharge of water closets shall have a minimum discharge opening of 1 1/4 inches (32 mm).

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.