The Highcliff Ultra floor-mount flushometer bowl features a revolutionary flushing engine and refined aesthetic design. 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 to1.6 gpf but can operate at 1.0 gpf. It performs well at every flush interval, making it uniquely effective with dual flush valves, and has been proven with all manner of valves (diaphragm, piston, manual, and electronic) from a variety of manufacturers.