WaterSense® is a public-private partnership program between the Environmental Protection Agency and manufacturers to provide water-efficient products. WaterSense products have been independently tested and certified. As a result of meeting the WaterSense standards, the products can bear the WaterSense logo (see Figure 3.9) in all packaging, marketing, and pro­motion.

Generally, products that meet the WaterSense standards are 20 percent more efficient than com­parable products on the market. In addition, the products must perform their intended function without sacrificing performance, especially to conserve water. In addition, through an agreement between the Environmental Protection Agency and Environment Canada, WaterSense products will be available in Canada.

Подпись: FIGURE 3.9 WaterSense makes it easy to find and select water-efficient products and ensures consumer confidence in those products with a label backed by third-party, independent, testing and certification. U.S. Environmental Protection Agency

Подпись: FIGURE 3.8 Danze's air injection technology uses a mix of air and water to provide a high- performance shower with lower flow rates (as low as 1.5 gpm). Courtesy of Danze, Inc.

Choosing WaterSense products for a bathroom offers the designer an excellent opportunity to maximize the sustainable use of water in the bathroom. In fact, the majority of WaterSense prod­ucts currently available are residential bathroom fixtures! The designer can choose WaterSense toilets, bathroom lavatory faucets and aerators, and showerheads. WaterSense products offer an opportunity to increase water efficiency yet still give the designer many options in creating a unique, and perhaps luxury, space.

WaterSense Toilets

The current standard for a toilet is 1.6 gallons (6 liters) per flush (gpf or Ipf). The WaterSense toilet specification is 1.28 gpf (4.8 lpf). Some toilets on the market offer even more efficient water use, such as 1.0 gpf (3.8 lpf).

Manufacturers have achieved the efficient use of water for toilet flushing through the use of dif­ferent technologies. This includes improving the existing flushing system or using air pressure to power the flush. With a dual-flush system, more water is used when flushing solid waste than liquid waste, but the average water use meets the WaterSense standard. Some toilets may use a pump to assist the flush, requiring an electrical connection for installation.

WaterSense toilets must also meet the minimum MaP threshold for flushing of solid waste: 350 grams of solid waste (including toilet paper) in a single flush. The MaP (Maximum Performance Testing) program creates a standard of effective performance that prevents double flushing, and thus inefficient use of water. MaP is a voluntary testing program recognized in both the United States and Canada.

Updated: September 27, 2015 — 5:54 am