If you are looking for a backup pump to protect your basement in the case of a power outage, then the Liberty SJ10 Sumpjet is the right pump for you. The Liberty SJ10 is powered by your municipal water supply, requiring no electricity at all but does require an uninterrupted water source to operate. It is highly efficient, pumping 2 gallons of water per 1 gallon used, is fully automatic and is backed by a Liberty standard 2-year warranty.