Zurn AquaSense® E-Z Flush® Retrofit Kit with Metal Cover in Chrome ZERK-CPME Z Flush Retrofit Kit Zurn's ZERK products work well in all bathroom environments adapting to various water pressures and water quality. They are equipped with special features like user in view L. E. D, low battery indicator light, switchable 24 hour autoflush and three second delay flush to deter false flushing, 10 degree angled sensor for optimum user detection, courtesy flush button with high impact resistant polycarbonate, housing impact