Part family guide
Moen Posi-Temp Cartridge Family Boundaries
The Posi-Temp service family centers on cartridge 1222; 1222B is commonly encountered legacy/package labeling, while 1225, 1200, and Moentrol cartridges are separate applications.
Direct answer
Use Moen 1222 only after confirming a Posi-Temp valve with a rotate-only handle action and matching cartridge retention. The lettered 1222B designation does not create a different valve family, but Moentrol and standard one-handle faucet cartridges are incompatible lookalikes.
Fit facts
What identifies this match
Use these details together. One matching feature does not establish compatibility.
- Current service number
- 1222
- Common alias
- 1222B
- Valve platform
- Posi-Temp
- Handle action
- Rotate to turn on and change temperature
- Function
- Pressure-balancing tub/shower cartridge
- Excluded systems
- Moentrol, M-Core, and standard faucet cartridges
What defines Posi-Temp
Posi-Temp is a valve platform, not a generic name for every Moen shower cartridge. Moen’s support material identifies 1222 as the replacement cartridge for this pressure-balancing system.
The useful field clue is handle behavior: a standard Posi-Temp control rotates from off through cold toward hot rather than pulling outward for volume.
1222 and 1222B naming
Installers and older packaging may use 1222B while current Moen consumer pages emphasize 1222. Treat the letter as a labeling history to reconcile, not as proof of a second cartridge geometry.
The official current product number should drive ordering; compare the actual removed cartridge and package description when old paperwork says 1222B.
Incompatible neighboring families
Moentrol valves traditionally use a pull-on, push-off action and are not identified by the Posi-Temp 1222 number. The 1200/1225 family serves many one-handle faucets, while M-Core uses its own cartridge architecture.
A Moen escutcheon or handle can be changed, so trim appearance alone cannot establish the rough-in valve behind the wall.
Confirmation workflow
Observe handle motion before disassembly, then shut off water and compare the exposed valve and cartridge retention with Moen’s illustrated service procedure. Read any casting or installation paperwork and compare the complete extracted cartridge—not only the stem.
Questions
Before you remove or replace the part
What is the current Posi-Temp replacement cartridge?
Moen lists 1222 as its Posi-Temp replacement cartridge.
Does 1225 fit Posi-Temp?
No. 1225 belongs to a different one-handle faucet cartridge family.
Can trim appearance identify 1222?
Not reliably. Confirm handle action, valve platform, retention, and the removed cartridge.