Waterless urinals (also can be installed in schools) Waterless car washes Infrared or foot-operated taps, which can save water by using short bursts of water for rinsing in a kitchen or bathroom Pressurized waterbrooms, which can be used instead of a hose to clean sidewalks X-ray film processor re-circulation systems Cooling tower conductivity controllers Water-saving steam sterilizers, for use in hospitals and health care facilities Rain water harvesting Water to Water heat exchangers.