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Moen Solutions

Two Handle 4" Centerset Knob: Flat Cap (Prior to 2017)

Moen produces a variety of two handle bathroom faucets. The interior components and assembly are not the same for each model. This article will explain one of the most common handle assemblies referred to as a Flat Cap Knob. This faucet style utilizes a 1224 cartridge.


2h knob 1224 cap.png


  1. Carefully pull the cap (#1) out of the handle (#3).
  2. Using a Phillips screwdriver, remove the handle screw (#2). Lift off the handle (#3).

To replace the cartridge see article 1224 Cartridge: Two Handle 4" Centerset Bathroom Faucets.




  1. The top of the cartridge stem (#4) matches the profile inside the handle (#3). Use pliers to adjust the cartridge stem (#4) if needed.
  2. Place the handle (#3) onto the faucet.
  3. Using a Phillips screwdriver, install and tighten the handle screw (#2).
  4. Snap the cap (#1) onto the handle (#3)

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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