Sump pumps in general, is a category that encompasses a number of styles of pumps that are used to pump out collected fluid. Sump pumps are used in applications where excess water must be pumped away from a particular area. Automatic sump pumps are those in which the pumping out of the liquid or solid happens automatically when they reach their maximum levels. These sump pumps generally sit in a basin or sump that collects this excess water, hence the name basin sump pump, or simply sump pump. This classification includes bilge and ballast pumps, centrifugal pumps, cantilever pumps, sewage pump pumps, submersible sump pumps and utility pumps, among others. All of these styles may be driven by any of the following power sources, AC power, DC power, hydraulically actuation, or water powered sump pumps. Routine maintenance of the pumps and periodic inspection of the sump pump pit should also be conducted to make sure that large solids or other items are not in a position that could clog the pump system and cause failure.