Sloan® SFSM flushometers are equipped with Smart Sense Technology, which applies extended range and logic techniques to significantly reduce water usage in high use urinal applications, such as when a continuous line of people (or queue) forms. In fact, during a continuous queue, regardardless of the number of users, the maximum amount of water used is only 2.5 gallons, assuming a 0.5 gpf diaphragm kit.