Green Homes Special Series: Part Five: Water-Efficient Plumbing Fixtures

These toilets accomplish the task using several methods: single flush gravity fed; pressure assist using a tank storage device or water line pressure; power assist using a small pump to force water at a higher velocity; and dual-flush gravity fed. The gravity-fed KOHLER Persuade™ is one example that offers the dual-flush technology. Using a two-button actuator integrated into the top of the tank lid, the user can flush either 1.6 gallons or half that amount, 0.8 gallons, depending on need. According to Kohler Co., the latter flush option, if used routinely to remove light or liquid waste, could save a household of four between 2,000 and 5,000 gallons of water per year versus standard models. The Persuade features a skirted toilet bowl, which the company notes as significantly more hygienic than other models, and eliminates potential debris buildup around the trapway and bowl-tank connection. The Del Casa No-Flush™ Urinal by Waterless Co. brings a whole new option for water saving to the residential bathroom. Photo © Waterless Co. Waterless Urinals Another way to cut bathroom water use is something not readily considered for a residential setting. However, interest in waterless urinals at home is rising, says Klaus Reichardt, president of Waterless Co. LLC. Requests are coming from families with several boys at home, those concerned about water conservation and water and sewer costs, and from builders of large spec homes in which there are his and her bathrooms. The product does work in retrofits if there is enough space in the bathroom, says Reichardt. Often there is room enough, about two feet, for a urinal between the sink and toilet. The plumber only needs to open up the wall to provide a line to the drain line. There is no need for a water line. The system is simple. The trap is filled with a liquid sealant that prevents sewer gas and odors from escaping the plumbing below. Urine is temporarily stored in the trap. As it accumulates, it overflows into the drain pipe. On the assumption that a male resident might use the urinal three times a day, the water savings is more than 1,700 gallons a year, says Reichardt. In addition, products such as the Del Casa No-Flush™ Urinal by Waterless are available in a variety of colors, including granite for a high-end look.

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