All standard Moen Posi-Temp shower valves utilize the Moen 1222 cartridge (or its bulk-packaged counterpart, the 1222B), meaning the internal replacement component is uniform across the entire Posi-Temp product line. While different exterior trim kits, handles, and escutcheon plates match various bathroom styles, the underlying brass pressure-balancing valve and 1222 cartridge architecture remain completely standardized, ensuring easy parts compatibility across generations of Moen Posi-Temp installations.
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