TOTO WT151M Duofit In-Wall Tank System with PEX Supply line, 1.6 GPF & 0.9 GPF

"Because it's wall-mounted, this In-Wall Tank System takes up less floor space, giving your bathroom a more open feeling and making it easier to clean. Modern design, with our practical Dual-Max flushing system. Dual-Max Flushing System, low consumption (1.6 GPF and 0.9 GPF). Average flush 1.28 GPF PEX supply line with optional Washlet® connection Universal Height Adjustable 15”-19” mounting height Support up to 880 lbs Commercial 2" x 6" or optional residential installation with 2" x 4" wall studs with waste outlet kit 1-pc blow molded polyethylene tank to prevent leaks 2" x 6" polyethylene outlet included Complete with bolt caps"