Cartridge Bilge Pumps 1000 GPH. The 1000 GPH incorporates some of the most advanced features in the industry, features developed from service in a wide variety of uses including racing, cruising, sport fishing, and demanding commercial duties. We have improved the design with 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.. Both the Cartridge and the Ultima Combo pumps may be manually operated via the Johnson Pump bilge control panel.. CE-approved. Features:. Compact, all-in-one motor/impeller unit. No tools needed for maintenance. Extremely energy efficient. Water-cooled motor for long service intervals. Meets the international standard, ISO 8849 marine. Capacity 3 ft (0.9 m) head (13.6 V): 50 l/min - 800 GPH. Capacity Straight: 63 l/min - 1000 GPH. Amperage: 3.2 A. Fuse Size: 5 A. Connection: 3/4". Ma