To find water-wise fixtures, look for the WaterSense label. WaterSense, a partnership program with U.S. Environmental Protection Agency, is an independent organization that reviews plumbing fixtures for water efficiency (among many other jobs). Their certification, or approval, is given to fixtures that are at least 20 percent more efficient without compromising performance. The average bathroom makeover with WaterSense fixtures saves 7,000 gallons of water annually. That's enough water to wash six months worth of laundry.Bathroom faucets. Getting a faucet with the WaterSense can reduce your sink's water flow by up to 30 percent. Doing so will save the average home 500 gallons of water annually. You can also add an aerator to bathroom taps. An aerator decreases water flow while maintaining or even increasing water pressure by mixing water with air. And regardless of how much water comes out of your tap, don't forget to turn off the faucet while shaving or brushing teeth.