American Standard 6045.013.002 Manual Flatwise 0.125 GPF Urinal Flush Valve, Chrome Ada Compliant Piston operation delivers superior flush accuracy and repeatability Positive seal ensures leak-free performance 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