The Johnson Pump Ultra Ballast Pump is designed to quickly fill, or reverse and empty, a ballast tank. The Ultra Ballast Pump is fast and efficient, pumping at a rate of 13.5 GPM. Built to handle both fresh and salt water, the robust design can handle continuous use, is reversible, and has a built in thermal overload for added protection. Run dry protection feature will shut down the pump if no water is present.