This Highcliff Ultra floor-mount flushometer bowl features a revolutionary flushing engine and refined aesthetic design with bedpan lugs. Measuring 16-7/8" to the top of the rim, the Highcliff Ultra meets both ADA and CSA height requirements. The Ultra engine represents a breakthrough in flush performance, tolerating a wide range of water supply conditions found in R&R and new construction. The Highcliff Ultra is listed from 1. 1 to 1. 6 gpf but can operate at 1. 0 gpf. It performs well at every flush interval, making it uniquely effective with dual flush valves. It has been proven with all manner of valves (diaphragm, piston, manual, and electronic) from a variety of manufacturers.