From the Manufacturer
A fully assembled pump combination that includes a number one 115 volt automatic sump pump and the model 441 battery back-up pump. The Model 441 provides uninterrupted pumping within the event of power outage or main pump failure. When the 441 is operating, audible and visual alarm warns of backup pump operation. The Model 441 back-up pump is able to pumping as much as 44 GPM. The program includes number one pump check valve and back-up pump check valve. The principle pump included on this system is Liberty’s Model 257 and is able to pumping as much as 50 GPM. For complete number one pump specifications see Liberty’s 250-series literature. For complete back-up pump specifications see Liberty’s Model 441 literature.
1/3 horse power number one pump with maximum discharge head of 23-Foot
Back-up pump with a maximum discharge head of 23-Foot
In a position to hook up with 1-1/2-Inch discharge
Compact profile will fit minimum 15-Inch Diameter sump pits
Offers 5 stage battery charging and protection from battery burn-out or overcharging (12V deep cycle battery not included)