Sump Pump

Electric pumps installed in basements or crawlspaces to remove liquid, usually water, as it accumulates in a sump pit. The water level rises and trips a float switch, turning on the pump and sending the excess water away from the structure.   

Example: Sump pumps help keep your basement dry and protect the home from water damage, foundation problems, and mold growth. With storms, flooding, melting snow, or other excessive moisture, these machines help keep your home or business free of flood and storm water.