Product Description Headquartered in Bergen, NY, Liberty Pumps is a leading U.S. manufacturer of pumping products for ground water and wastewater removal in residential and commercial applications. From the Manufacturer The SumpJet (Model SJ10) is a water powered back-up sump pump that will protect your basement in the case of a power outage. This unique product is powered by your municipal water supply and requires no electricity to operate. With a compact high efficiency design, the SumpJet removes 2-Gallon of sump water per 1-Gallon used (based on 5-Foot lift). The SumpJet is fully automatic, arrives completely assembled, and comes backed with Liberty's standard 2 year warranty. The SJ10 requires an uninterrupted water source to operate.