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Moen Solutions

Handle Assembly and 1224 Cartridge: Two or Three Handle Shower- Cap Knob

Moen produces a variety of two and three handle shower faucets. The interior components and assembly are not the same for each model. This article will explain how to service one of the more common handle assemblies and the 1224 interior flow cartridges.


  • The water supply shut off valves must be turned off- see article How to Turn Off the Water Supply to the Faucet..
  • Recommended Tools: Phillips Screwdriver, Pliers
  • We recommend covering the drain before beginning so to not loose any parts down the drain.




2h shower knob cap and cartridge.png


  1. Pull the handle cap (#1) out of the handle (#3) and unthread the Phillips screw (#2) using a Phillips screwdriver.
  2. Remove the handle (#3) and slide the wall tube (#4) out.
  3. Use pliers to unthread the cartridge nut (#5) and then pull out the stem extension (#6).
  4. Using pliers, grab the white stem of the cartridge (#7)  and pull the cartridge (#7) out.

We recommend cleaning and flushing the valve body (#8) prior to re-assembly, see Valve Body Cleaning and Flushing for additional details. 


  1. Align the tab on the side of the cartridge (#2) with the notch in the brass valve body (#3) and slide the cartridge (#2) into the valve body.
    2h tub shower align cartridge.png
  2. Slide the stem extension (#6) onto the stem of the cartridge (#7).
  3. Use pliers to tighten the cartridge nut (#5).
  4. Slide the wall tube (#4) back on and then reinstall the handle (#3).
  5. Use a Phillips screwdriver to thread and tighten the Phillips screw.
  6. Insert the handle cap (#1)

For additional information on Moen products visit and select the type of product you are repairing. The guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.

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