Easy to install with little or no plumbing knowledge required! This pre-assembled Basement Watchdog Combination Sump Pump System provides both primary and battery backup pumping capabilities, offering complete protection and peace of mind. Pumping up to 3,720 GPH, the 1/3 HP cast iron primary sump pump is both powerful and energy efficient, using only 3.5 amps. This system includes the Basement Watchdog Emergency Battery Backup Sump pump system that provides 24 hour a day monitoring of pump, power, and battery conditions. It will protect your basement from a power outage, primary pump or float failure, and provide extra pumping capacity when needed. The user-friendly controller will sound an alarm, give a visual light, and pinpoint the problem. The battery backup sump pump can run intermittently for days on a single battery charge from any Basement Watchdog Standby Battery. With the Combination sump pump system in your pit, you can feel safe that the Basement Watchdog is watching out for you! 1/3 HP energy efficient permanent split capacitor (PSC) primary pump saves money on your electric bills Primary pump capacity 3,100 GPH at a 10 ft. lift and 3,720 GPH at 0 ft. lift, Backup system capacity 1,000 GPH at 10 ft. lift and 2,000 GPH at 0 ft. lift User-friendly controller monitors pump, power and battery conditions 24 hours a day and provides a visual and audible alarms to describe what to do for easy maintenance Dual float switches on both the primary and backup systems provide 4x the protection Provides days of intermittent pumping power on a single battery charge Compatible with both wet cell and maintenance-free AGM batteries (battery not included - sold separately) Compact design fits in pits with diameters as small as 12 in Automatic 0.4 Amp charger Battery Voltage: 12 VDC Sub Type: Submersible sump pump Type: Sump pumps Cord Length (Feet): 10 Inlet Diameter: 1-1/2-in Outlet Diameter: 1-1/2-in Alarm Included: Yes Amperage: 3.5 Application: Sump - ground water use only Battery Backup: Yes Check Valve: Yes Gallons per Minute (Gallons): 62 Impeller Material: Polycarbonate Material: Cast iron Maximum PSI: 0 Outlet Connection: NPT Package Contents: 0.33 HP primary pump, 12V backup pump, 2 controllers, 0.4 Amp battery charger, two dual float switches, battery cap with adapter for fluid sensor, 2 pre-installed check valves, 0.5 in rubber union, “Y” connector (battery not included – sold separately) Package Quantity: 1 Portable: No Power Source: Electric Pump Horsepower: 1/3-HP Submersible: Yes Switch Type: Specialty Vertical Lift: 22-ft Volts: 115 Warranty: 2-year limited Water Flow (GPM): 3720 CA Residents: Prop 65 Warning(s): No Safety Listing: cULus safety listing UNSPSC: 40151500