Pondmaster, MDWP20, 2000 GPH, Magnetic Drive Waterfall Pump, Designed For Use In Skimmers & Waterfalls, Powerful, Efficient Magnetic Drive Motor Provides Continuous Duty Operation, Oil Free, Fish Safe, & Completely Submersible, Large Clog Resistant Filter Screen, Back Flow Check Valve, 1-1/2" Fittings, 20' Grounded Power Cord, Replacement Impeller Available, 1 Year Limited Warranty.