Water powered sump pumps eliminate basement flooding without electricity! This unique pump uses standard water pressure to keep your basement dry even during a power failure. Use as an emergency back-up in tandem with your conventional sump pump or by itself in new construction. Rated for intermittent or continuous use. 3/4” I.D. Copper water supply and main 50 psi inlet pressure. With a 5’ lift, it pumps 780 GPH, with15’ lift- 490 GPH. x Inlet size 1” FIP thread. With each1 gallon of fresh water, it pumps 2 gallons of sump water. 3/4 I.D. Copper. USA.