Niagara Conservation. With full-time 0.8 gpf, the Stealth toilet uses 37% less water than standard high-efficiency toilets. According to the firm, the WaterSense-certified unit's hydraulic technology--a combination of water and air pressure--creates a larger water spot and produces a flush powerful enough to clear the bowl. Round and elongated models are available. 800.831.8383. www.niagaraconservation.com.