Ultima 1.28 GPF Touchless Sensor Diaphragm-Type Toilet Flush Valve for 1-1/2" Top SpudThe Ultima Diaphragm Flush Valve from American Standard is engineered to deliver superior performance and reliability with less maintenance, saving time and money. It features DynaClean, a self cleaning technology with exclusive wiper spring positioned at the orifice where clogs form. The wiper spring eliminates build up by clearing the refill orifice with every flush, preventing valve run on and water waste. Combined with the superior quality and