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Two Handle 4" Centerset Knob: Top Cap

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 Top Cap Knob. This faucet style utilizes a 1224 cartridge.


top cap faucet breakdown.png


  1. While holding the upper portion of the handle (#1) stationary, unscrew the base of the handle hub (#2) counter-clockwise to remove the complete handle.

 For replacing the cartridge see article 1224 Cartridge: Two Handle 4" Centerset Bathroom Faucets.


The top of the cartridge stem matches the profile inside the handle. Use pliers to adjust the cartridge stem if needed.

  1. Place the handle assembly on top of the faucet in the off position.
  2. While holding the upper portion of the handle (#1) stationary, thread the base of the handle hub (#2) clockwise to install the complete handle.

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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