Seaflo Automatic Submersible Boat Bilge Water Pump 12v 750gph Auto with Float Switch Flow Rate (GPH): 750GPH; Volt: 12V; Current(A): 3.0A; Head(M): 3.0M Wire Lead(M): 1m; Outlet Diameter: 19mm/ 3/4-Inch; Width: Approx. 81mm Built-in float switch! (No separate float switch is needed) No power use until pump is activated by internal float switch (when water level rises) Equipped with built in electronic controlled reed sensor system for easy fully automatic operation