EcoVantage High Efficiency Toilet System Vitreous China, 1.1 gpf [4.16 lpf] or greater high efficiency, ADA, floor mounted, bottom outlet toilet with siphon jet flushing action and elongated front rim with integral bedpan lugs, and 1-1/2” top spud. This bowl is designed to perform to industry standards with as little as 1.1 gallons per flush.