For urinals with 3/4-inch (19 mm) exposed top spud Exclusive DynaClean self-cleaning wiper spring technology Integral wiper spring cleans refill orifice with every flush to help prevent valve run-on ADA-compliant non-hold open handle provides automatic shut-off after every flush Piston operation delivers superior flush accuracy and repeatability Self-cleaning brass piston with integral wiper spring prevents clogging and reduces maintenance Piston operation delivers superior flush accuracy and repeatability ADA compliant Piston valve remains closed and does not need to be reset after loss of water pressure Positive seal ensures leak-free performance