The SumpJet (Model SJ10A) 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 gallons of sump water per 1 gallon used. The SumpJet is fully automatic, arrives completely assembled, and comes backed with Liberty's standard 3 year warranty. This water powered poump comes with an alarm.