A water-powered sump pump is a type of sump pump that uses the pressure of your home's water supply to pump water out of the sump pit. . They're typically used as backup pumps in case of a power outage. They utilize municipal water pressure for operation. They're also environmentally friendly, as they don't use any electricity. However, they can use a significant amount of water, so you may see an increase in your water bill. Make sure you have adequate water pressure for a water-powered backup to operate.