A water-powered sump pump doesn't require electricity to operate. They're typically used as backup pumps in case of a power outage. Instead of using electricity, water-powered pumps use a venturi system that creates a vacuum to draw water up from the sump pit.. Water-powered sump pumps are a good option for homeowners who want a reliable backup system that doesn't require electricity or batteries. . They're not as powerful as electric pumps Make sure you have adequate water pressure for a water-powered backup to operate.