The American Standard Champion 4 Right Height Two-Piece Elongated 1.6 GPF Single Flush Toilet in White is a high efficiency toilet that uses only 1.6 gallons per flush. It features a fully glazed 2-1/8" trapway and is made of durable vitreous china. This toilet has a Right Height elongated bowl for added comfort. It is ADA compliant and meets the standards for EPA WaterSense. The toilet is designed for a 12" rough-in.