Determining whether you need a Moen 1222 or Moen 1225 replacement cartridge requires examining the design of your shower or sink valve and the configuration of the handle stem. The Moen 1222 cartridge (known as the Posi-Temp) is utilized exclusively in pressure-balancing shower valves where a single handle rotates back and forth to control temperature and pulls out to control volume. The Moen 1225 cartridge (the standard One-Handle cartridge) features a brass or plastic stem and 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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