A jockey pump is typically a lower pump that fits into a lift station to handle nuisance inflow or, conceivably, small constant overflows. Lift stations are designed to meet the peak inflow that the system could see, but this can lead to a system that’s wayover-designed for the inflow seen 99 of the time. For illustration, a lift station could be designed to handle all the stormwater from a casing development during a huge downtime rainfall, but for 10 months of the time the lift station only deals with runoff from sprinklers. It would be a waste to have a large pump constantly turning on and off to deal with a minimum quantum of runoff, so the jockey pump takes care of these situations. This setup saves plutocrat through energy savings and conservation costs.