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Moen Solutions

1234 Cartridge: Two Handle 4" Centerset Bathroom Faucets

This article will walk you through the process of replacing the internal water flow cartridge(s) in a small two handle 4" spread faucet. The 4" spread pertains to the measurement between the hot and cold handles. The information will include details about the tools needed and the method of removal.

Preparation:

  • The water supply shut off valves must be turned off- see article How to Turn Off the Water Supply to the Faucet.
  • Recommended Tools: Pliers, Flathead Screwdriver
  • The following instructions assume the handle and associated handle pieces have been removed. For additional details, visit solutions.moen.com and select the type you are repairing. The faucet guide will contain specific information on handle assemblies associated with that style of product.

 

There are two versions of the lever faucets that are almost identical. It is important to compare the following models to verify which one you are working with.

Version 1:

centerset 1234.png

Version 2:

1234 w extension.png

Disassembly:

1. Remove the cartridge nut (#1) by unthreading using pliers.

2. Lift the cartridge (#2) out of the valve body (#3).

Version 1: 

To remove the cartridge (#2), grab the silver stem of the cartridge (#2) with pliers and pull the cartridge (#2) out.            1234 removal.png

Version 2: 

To remove the cartridge, grab the red or blue stem extension (#4) with pliers and pull it out. To remove the stem extension (#4), use a flathead screwdriver to pry the side of the stem extension (#4) with 5 ribs off of the cartridge (#2). 1234 extension removal.png

It is recommended to clean and flush the valve body (#3) prior to installing the new cartridge (#2). See article Valve Body Cleaning and Flushing for additional details.

Assembly:

1. Install the cartridge.

Version 1:

The valve body (#3) opening has notches at the 3:00 and 9:00 position that the tabs on the top rim of the cartridge (#2) need to align with. Slide the cartridge into the valve body (#4).  1234 install.png

Version 2:

Prior to installing the new cartridge, snap the stem extension (#4) on to the new cartridge (#2). The valve body (#3) opening has notches at the 3:00 and 9:00 position that the tabs on the top rim of the cartridge (#2) need to align with. Slide the cartridge into the valve body (#4). 

install extension.pnginstall 1234 w extension.png

3. Install the cartridge nut (#1) by threading it on. Tighten with pliers.

For additional information on Moen products visit solutions.moen.com 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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