The WES-150 waterfree cartridge is the heart and soul of Sloan’s Waterfree urinals. These cartridgesfeature Falcon Waterfree Technology and utilize multiple unique design patents to provide safe, long lasting, low odor performance while saving tens of thousands of gallons of water every year. Since its introduction in 2004, there have been several improvements incorporated into the design based on feedback from customers. The latest design follows that same path and includes 6 all-new features to provide the best performance ever.