Toto Duofit In Wall Dual Flush 1.28 and 0.9 GPF Tank System with Washlet+ Auto Flush Ready Copper Supply LineThe TOTO DuoFit In Wall Tank with Auto Flush Ready Dual Flush System with Copper Supply takes up less floor space, giving your bathroom a more open feel and making it easier to clean. This modern design uses TOTO's Dual Max flushing system, allowing you to proactively conserve water with a full or light flush option. Choose between a 0. 9 GPF rinse or 1. 28 GPF for tougher jobs. Auto Flush option provides a hands free automatic flush after every use.