ZERK-CPM - ZERK-CPM E-Z Flush Automatic Retrofit Kit, SMALL, ChromeZurn E Z Flush Sensor Retrofit kit is designed to provide automatic flushing for urinal and water closet flush valves Zurns AquaSense E Z Flush Retrofit Kit is the easiest way to upgrade a flush valve. It delivers automatic flushing and can be used as a replacement for both urinal and water closest systems. The E Z Flush advanced water solution features a hands free infrared sensor and a manual override button. The kit comes complete with two wrenches