Algreen's MaxFlo WaterFall Pumps all have magnetic driven motors for extended life and increased durability. This MaxFlow, pumps 5000/9000/12000/16000/120000 liters per hour, is for under water use and is ideal for an impactfull waterfall. The pumps can be positioned vertically or horizontally for various pond configurations. This pump has a filter grid to protect the motor from large debris, 16 ft power cable and is fish friendly. This energy efficient pump is U.L listed with a 2 year warranty.