This Cimarron continuous clean toilet tank features an automatic dispensing system that delivers a consistent amount of toilet bowl cleaner with every flush to keep your bowl cleaner between flushes. Simply place a cleaning tablet in the tank compartment, set the desired amount with the adjustment dial, and the system does all the work. This water-efficient toilet tank also utilizes innovative AquaPiston technology, a patented flush engine that delivers a fast, powerful, and virtually plug-free flush.