Mixing valve cycles from "Off" to "Cold to "Warm" to "Hot". Hot limit safety stop. 47mm ceramic disc valve cartridge with back-to-back capability.
Comments about American Standard Pressure-Balance Rough Valve Body w/ Screwdriver Stops - R110SS:
plumber had to disassemble the item because it was leaking. he probably wasted 2-4 hours of time, that i paid for, troubleshooting this problem.