washdown model. Sanitary ceramics. this product works with industry standard in-wall carrier/tank systems such as those manufactured by Viega, Geberit and TOTO. Please refer to their respective compatibility charts.. includes "Supra-Fix" mounting system. EN 997. Please order toilet seat separately.. This wall-mounted toilet is made of vitreous china. The wall-mounted toilet is 22 1/4" (565mm) x 14 3/4" (375mm). The product has a concealed trapway and a D-shape bowl. The product is with ceramic plus. The product has a water use of 1.6/0.8. gpf (6/3 lpf). The wall-mounted toilet is Villeroy & Boch model 5600U0.. meets and exceeds ASME A112.19.2/CSA B45.1 ASME A112.19.14, Certifications: IAPMO(cUPC), EPA Watersense, City of Los Angeles and others, Code Compliance: UPC, IPC, NSPC, NPC Canada and others, EPA - Watersense. washdown model. concealed trapway. D-shape bowl. one year limited warranty. min Water pressure: 8 psi. water surface: 4" x 5 1/5" (104 x 132 mm). trap diameter: 2 1/8" (51mm). trap seal: 2 1/4" (55mm). minimum rough-in: 7" (180 mm) rough-in. rear outlet