Sump pumps are used for removing groundwater from basements and crawlspaces. They can be fully submerged in water.
Sewage pumps are used to lift household sewage water from a collection basin and send it to a gravity-fed sewage line or septic system.
Utility pumps are used for removing water from flooded areas, spas, and window wells. They can be fully submerged in water.
Well pumps are used to draw water from a well or cistern that is less than 25 feet deep. They are connected to a pressure tank system and run automatically with a factory-installed pressure switch.