Toilets

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. More

Kohler. The company’s first one-piece, single-flush high-efficiency toilet, the Archer uses 1.28 gpf and includes Class 5 flushing technology, which features a 3 1/4-inch flush valve and an efficient, direct-fed jet to maximize water flow. The transitional design boasts beveled edges and a curved base. 800.456.4537. www.kohler.com. More

Gerber. The WaterSense-labeled Avalanche 1.28-gpf toilet features the XP3 flushing system, which the firm says clears the bowl quickly and efficiently. The unit includes a 3-inch flush valve; a large water surface; a slim-line tank; and a color-matched, side-mounted lever. It comes in white or biscuit and is available in an ErgoHeight option. 866.538.5536. www.gerberonline.com. More

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Holst Architecture: Kohler Co.'s Cimarron 1.28-gallons-per-flush toliet tank. More

The company now offers its Sydney Smart high-efficiency toilet with a back outlet. The WaterSense-labeled dual-flush unit offers 1.28 gpf and 0.8 gpf. A large trapway eliminates blockages, says the maker, and washdown technology pushes waste from the bowl. It is Maximum Performance tested at 900 grams. 800.605.4218. More

The New York-based Wildlife Conservation Society’s Bronx Zoo saw the potential in ordinary, everyday facilities when it developed its eco-friendly restroom. More

Water-conserving toilets have come a long way. Here are nine models that combine low flow with high performance. More