To be considered a “sewage pump” the general rule is that the pump must be capable of passing at least a 2” solid unless it is a cutter type pump. However, depending on the application it may be necessary to pump up to a 4” solid. Always refer to the predominating code in your area to confirm that the pump you are specifying or installing conforms with local requirements.
Have a "pump" need then you need the Pump Boys at Cullen Company. We represent the top pump manufacturers and distribute all types of pumps and pump products. Our Professional Engineering Team is available to discuss how they can design a custom-made system that will be the solution to your "pump" challenges.