Aerator 500 Pump Pumps 500 GPH at open flow, up to 325 GPH at 3' head. Ideal for small boats or boats with single, standard capacity livewells. 3-1/2" x 1-1/2" inlet for recirculation pump. 36" lead wires attached. 12-volt D.C., CE rated. Outlet barbed for 3/4" I.D. hose attachment. Dimensions: Width including outlet: 3-13/16" Width base not including outlet: 3" Height not including thru-hull.