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 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!