Johnson Pump Electric Impeller Utility Pump. 12v. 540 GPH. Perfect for bilge pumping, deckwash, water circulation, refueling at dockside service, and more. The motor has a built-in thermal overload for added protection. May be combined with a vacuum switch for automatic operation. Bronze construction. Takes 1" hose. 1/2" NPT. 9 GPM. 7" L x 4.72" W x 3.54" H.