This Highcliff Ultra floor-mount flushometer bowl features a revolutionary flushing engine, a refined aesthetic design, and a second pair of bolt holes to provide great stability. 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 RandR and new construction. The Highcliff Ultra top spud is listed from 1.0 to 1.6 gpf and 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.