The EcoLogic™ Niagara Flapperless® toilet features revolutionary tip-bucket technology, creating a high-performance flush at 1.28 GPF. Niagara’s patented flapperless technology is maintenance-free, eliminating the need to replace flappers, chains and levers. The tip-bucket technology creates a high performance flush at 1.28 gpf which substantially decreases water consumption. No double flushing, one flush will thoroughly empty the bowl every time. No leaks ever… plus no-sweat tank. The huge 11” x 20” replacement footprint is designed to cover the existing cutout area with ease, eliminating costly flooring repairs and will fit both 10” x 12” rough-ins.