This product from American Standard is plumber tested and plumber approved. This product is backed by an industry-leading warranty that includes lifetime on chinaware, 5 years on mechanical parts, and 1 year on the seat. This chair-height toilet features an elongated bowl for optimal comfort. Engineered for high-efficiency, low consumption, it uses 1.28 gallons per flush, 20% less water than a regular toilet, and is WaterSense® certified, your assurance of optimal water savings, quality and performance. The EverClean surface inhibits the growth of stain and odor-causing bacteria, mold and mildew.