The Cal Torpedo Pumps are the first pumps designed for the pond enthusiast that are lightweight, water cooled, use no oil and can be used in or out of water. Cal Pump Torpedo Pumps' high volume water flow and low energy consumption makes them the most unique pond pumps available. Can be used either submerged or in-line Oil-free High output for large waterfalls 1 year warranty Pump Specifications Amps 2.6 - 4.5 Watts 290 - 520 Max Flow 4200 Max Head 28' Inlet- Outlet Size 1½" MPT Cord Length 20' Warranty 1 year GPH per foot of Head 1' 5' 10' 20' 25' 4166 3672 3110 1830 960