Cartridge Bilge Pumps 500 GPHFor 500 GPH, 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-ApprovedFeatures:Compact, all-in-one motor/impeller unitNo tools needed for maintenanceExtremely energy efficientWater-cooled motor for long service intervalsMeets the international standard, ISO 8849 marineCapacity 3 ft (0.9 m) head (13.6 V): 33 l/min - 525 GPHCapacity Straight: 40 l/min - 630 GPHAmerpage: 2.5AFuse Size: 5 AConnection: 3/4Max Height: 112 mm - 4.4Weight: 0.27 kg - 9.6 oz.