The Viper is a compact elongated high-efficiency toilet that uses 1.28 gallons of water in a single flush. With a two-piece design that’s easy to clean, it also has a compact footprint. Other highlights include a 3-inch flush valve for effective bowl cleaning, a 2-inch glazed trapway, and a color-matched metal tank lever with brass arm. Gerber Plumbing Fixtures. www.gerber.com. Booth No. C3514.