The Iwaki RLT type aquarium pumps handle back pressure better than RLXT pumps and can be used for almost any application. They are recommended for high-head situations or when using cartridge (pressure) filters. The WMD pumps have American motors.Flow rate: 750 gphMax head: 21.3 feetAmps: 1.9Dimensions: 11" X 4.4" X 4.75"Connections: 3/4" MPT Inlet / 3/4" MPT OutletPerformance charts (new window)Further specifications (pdf file in new window)American motorThe RLT type aquarium pumps handle back pressure better and can be used for almost any application. Especially recommended for high-head situations or when using cartridge (pressure) filters.