Selecting and Sizing a Sewage Ejector Pump

Sewage ejector pumps take care of transporting sewage out of a building when toilets or sinks are located below the sewer line, as is often the case in basements. Guidelines for selecting the proper tank and pump can read like a college thesis, but the basic rules are not complicated.

The size and horsepower of the pump you need is determined by the number of drains feeding the tank. Most available ejector pumps (note: these are not the same as sump pumps!) come in .4 or .5 horsepower; 1-3 drains require at least .4 hp, and 4 or more, at least .5 hp.