Sump Jet Water-Powered Sump Pump with Alarm SJ10A Water Powered Back Up Pump with indoor 115v alarm with 9v battery back-up. Compact probe mounted sensor, auxiliary contacts with visual and audio alarm. The SumpJet® 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. Liberty Pump SJ10A Features: Accepts 20PSI up to 100PSI inlet supply pressure Includes alarm with audible and visual warnings when back-up pump is activated Fully automatic High-output flow rates Compact design Fully assembled 1-1/2" discharge Works off municipal water supply 3/4" NPT water inlet connection Sharkbit inlet connection accepts pex, copper, or CTS CPVC 3/4" line Includes adjustable stainless steel hose clamp for easy mounting Built-in screen with removable foot valve Constructed of durable PVC Note: The SJ10 requires an uninterrupted water source to operate. If you have a well pump, the SJ10 will not operate during power outages. Liberty Pump SJ10A Specifications: Height: 21.6" Width: 5.1" Length: 14.5" Category: Sump Pump Connection Size: 1-1/2" Maximum Fluid Temperature(F): 130 Degrees Weight: 8 lbs.