The Big John submersible sump pump provides efficient, trouble free service for extended or continuous use in moving large volumes of water. A choice of manual or automatic versions with various switch configurations provides the user the right unit for their needs. Little Giant's submersible sump pump is ideal for use in excavation, crawl space, basement, underground passageway, loading docks, grain elevator, construction site, cooling tower, fire cleanup and other applications requiring high volume water dispersal. It features cast bronze or cast iron housings with protective epoxy coating for corrosion and rust resistance. This sump pump has an oil filled motor housing for lifetime lubrication and rapid heat dissipation.