Determining whether you need a Moen 1222 or Moen 1225 replacement cartridge depends entirely on your fixture's handle operation and valve configuration. The Moen 1222 cartridge is utilized exclusively in single-handle Posi-Temp pressure-balancing shower valves where the handle rotates in an arc to control temperature and pulls straight out for volume. The Moen 1225 cartridge is deployed in older single-handle tub, shower, or kitchen faucets where the handle lifts up, pulls out, and rotates from side to side.
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