The washlet g400 a smart toilet and a convenient compact design. the 3d tornado flush system uses an efficient 1.28 or 0.9 gpf. complete with our cefiontect ion barrier glaze. the g400 minimizes debris and mold from sticking to ceramic surfaces, keeping your toilet cleaner, longer. features high-tech electronic bidet seat 28-5/8"l x 15-3/8"w x 26-15/16"h 3d tornado flush system cefiontect ceramic glaze ada compliant universal height sleek, low profile skirted one-piece elongated front bowl remote control operated front and rear warm water washing with temperature and adjustable pressure control heated seat with temperature control air deodorizer, dryer function illuminated touch pad, 2 user memory auto open/close lid, auto flush premist of bowl before each use 12" rough-in, mounting and connection hardware included remote control and hanger included water supply should be 11-7/16" to the left (facing the bowl) from the center line of closet flange