High Efficiency Urinals | Non-Water Urinals
Different types of flushing urinals have existed in North America for many years with little technological change. In the early 1990s, however, the introduction of the first non-water urinal in the U.S. changed the perspective of water efficiency proponents. Since that time, hundreds of thousands of non-water urinals have been installed here, savings millions of gallons of water each year. At the same time, the number of manufacturers with product in the U.S. has grown.
However, the non-water urinal is not without controversy, and the need for further research is clearly evident. Issues of maintenance requirements, questions about the life expectancy of the liquid seal (or cartridge), concerns over build-up of urine solids in the drainlines behind these fixtures, and, finally, issues with the economics or cost-effectiveness of non-water urinals in areas where water and sewer charges are low, all seem to argue in favor of more research on these important topics.
While non-water urinals offer the complete elimination of flush valves and water use, other high-efficiency technologies are now making their appearance. The national standard for urinals mandates a maximum flush volume of 1.0-gallons (3.8-liters), yet urinals flushing at significantly less water volume have existed in the marketplace for at least 15 years. Today, manufacturers are developing and refining urinal models that flush at 0.5-gpf (1.9-liters) and below, some with as little as 1-pint of water (0.5-liters).
With the market success of non-water urinals, coupled with the array of models flushing at 0.5-gpf and less, a new category of urinal fixtures has been defined, the HIGH-EFFICIENCY URINAL (HEU). The HEU is defined as a fixture that functions at 0.5-gpf/1.9-lpf or less. (NOTE: The HEU category includes non-water urinal fixtures.)