Different types of flushing urinals have existed in North America for many years with little technological change. In the early 1990s, however, the first non-water (waterless) urinal in North America was introduced. Since then, other urinal technologies have likewise surfaced that individually save almost as much water as the non-water design.
It is important that before making a purchase decision regarding a urinal (non-water or flushing), you perform a full life cycle cost analysis of the installation to prevent significant financial ‘surprises’ later on.
More information on urinals, including WaterSense-certification, may be found here.