The floor-mount flushometer bowl features a revolutionary flushing engine and refined aesthetic design. Measuring 15-1/4-in to the top of the rim, the product is perfect for smaller restrooms and stalls. The Ultra engine represents a breakthrough in flush performance, tolerating a wide range of water supply conditions found in R&R and new construction. This product is listed from 1.1 to 1.6 GDF but can operate at 1.0 GDF. 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.