Johnson Pump Cartridge Submersible Bilge Pump 500 GPH -Our Cartridge Pumps incorporate some of the most advanced features in the industry, features developed from service in a wide variety of uses including racing, cruising, sport shing, and demanding commercial duties. -The 500 GPH, 750 GPH, and 1000 GPH has easy-to-install Dura-Port discharge ports to eliminate stress cracking caused by over-tightened hose clamps. -The pumps are delivered including both a straight and a 90 degree smooth elbow Dura-Port as well as a removable check valve. -Voltage: 12V DC -Amperage: 2.5 Amps -Fuse Size: 5 Amp -Connection: 3/4 Inch -Body: Thermoplastic -Shaft Seal: Lip Seal -Motor Shaft: Stainless Steel -Wire Size: 16 GA.