Sloan Royal 113-1.28-ESS-TMO Exposed Chrome Plated Electronically Operated Closet High Efficiency Flush Valve. The Sloan Royal 113-1.28-ESS-TMO Complies with ADA Requirements with the Sensor Activated, Water Saving 1.28-ESS-TMO Gallon Per Flush Diaphram type Flushometer also features a 1" IPS Bak-Check Screwdriver Stop, Control Stop Plug, and Has no External Water Adjustment to Ensure Water Conservation. The Sloan Royal 113-1.28-ESS-TMO is constructed of a high copper, low Zinc Casting for dezincification resistance.