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Liberty 12V Backup Sump Pump System - Model 441

Price: $327.75
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Liberty 441 Backup Pump-12V Emergency Sump Pump System

Liberty's model 441 takes over when the power goes out. Operating from the power of a marine-grade deep-cycle battery*, the 441 features a high-output 12 volt pump, advanced 5-stage charging system, easy-connect terminal block, battery box and plumbing connections. *(Battery not included.) Designed to be used in conjunction with a primary 120V sump pump.

Battery operated 12 Volt DC

Adapts to 1-1/2 or 1-1/4 Discharge

Model 441 Includes:
  • High output 12 volt submersible pump
  • Automatic, mercury-free switch
  • Control panel
  • Battery box and strap (battery not included)
  • 12 volt charger
  • Tee, check valve and bushings for 1-1/2" or 1-1/4" connections


Automatic start-up Advanced 5-stage charging system Audible in-use alarm and light Advanced Charging System outperforms "trickle" chargers with a 5-stage charging process. The system tests the battery and maintains a maximum charge without running the battery down or self-discharging. A sophisticated charging algorithm continuously tests the charging process from start to finish. Works with WET Cell or AGM style batteries. Time dependent charging with built-in 150-hour safety timer. If the safety timer "times-out," A "Fault" is displayed and charging is discontinued to protect equipment from "run-away" battery under charge. Reverse battery and short circuit protection Audible alarm and light advises of emergency pump operation Works with marine-type deep-cycle batteries (not included with system), group 27 or 31, AGM or WET Cell. (Liberty Pumps StormCell™ batteries recommended.) Easy wiring with slip-on connectors and terminal block Fully assembled float switch

Charger Specifications:

INPUT: 120Vac, 0.19Aac, 60Hz OUTPUT: 12Vdc, 900mA Safety Timer: 150 hours NOTE: Frequency of pump cycle, length of running time and pumping head will vary the lifetime of battery operation. Under a continuous-run situation the battery will last up to 4 hours and up to 30 hours in intermittent operation.