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Moen Solutions

92451 Cartridge Service Kit Repair Guide

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This article includes details about the tools needed and steps involved in rebuilding the Moen1225 magnum cartridge using the service kit 92451.
  

The following instructions require that the cartridge has been removed and saved, see the links below for the removal instructions.

Single Handle Kitchen Faucets:
1225 Cartridge: Kitchen Faucet
Single Handle Bathroom Faucets:
1225 Cartridge: Single Handle Bathroom Faucets (Prior to 2009)
Single Handle Standard Showers:
1225 Cartridge: Single Handle Shower-Standard Valve
Single Handle Moentrol Showers:
1225 Cartridge: Single Handle Shower-Moentrol Valve
Preparation for the 92451 Cartridge Service Kit Repair: 
  • The water supply shut off valves must be turned off- see article How to Turn Off the Water Supply to the Faucet.
  • You will need your existing cartridge to install this kit.
  • Recommended Items: 
    • Tweezers for O-ring removal
    • Bottle Brush, Toothbrush and Bowl for Valve Cleaning/Flushing prior to reinstalling cartridge in faucet-For details see  Valve Body Cleaning and Flushing
    • Cardboard or Newspaper to protect your counter surface while servicing the cartridge
The 92451 Cartridge Service Kit Includes:

1. Two Grommets

2. Two Large O-rings

3. Two Small O-rings

4. Twisting Tool

5. Grease Packet  

Snag_b42c73.png
Not Included:

The 92451 kit will allow you to rebuild your faucets existing 1225 cartridge, a new Cartridge is not provided. 

6. Cartridge Shell 

7. Cartridge Stem 

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92451 Instruction Sheet.pdf

Step 1 While holding the Cartridge Shell (6) firmly, press the brass Cartridge Stem (7) down (through the Cartridge Shell (6)) as far as possible, then grab the exposed end and pull the Cartridge Stem (7) out completely.

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Step 1.gif

Step 2 Remove the Small O-rings (3) from the Cartridge Stem (7) assembly. 

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Step 2.gif

Step 3  Lightly lubricate* the new Small O-rings (3) using the Grease Packet (5) and install them on the two grooves shown. If they are they are positioned in the wrong grooves on the Cartridge Stem (7) the faucet will leak (see diagram in Step 2).

* Applying too much lubricant to the Small O-rings (3) on the Cartridge Stem (7) the faucet will experience a symptom called Handle Drop. Handle Drop is when the handle will not stay in the open position and will self-close. When this happens Moen recommends removing the cartridge and wiping some of the lubricant off of the Small O-rings (3).

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Do not put any lubrication from the Grease Packet (5) in the Weep Hole (8). 

 Step 3.gif

Step 4 Carefully slide the Cartridge Stem (7) back in from the bottom of the Cartridge Shell (6).

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 Step 4.gif

Step 5  Gently pull the Grommets (1) from the outside of the Cartridge Shell (6).

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Step 5.gif

Step 6   Lightly lubricate the new Grommets (1) using the Grease Packet (5). install them carefully in the two recessed areas on the outer Cartridge Shell (6).  

 Step 6.gif

Step 7  Remove the two Large O-rings (2) from the outside of the Cartridge Shell (6).

 Snag_f59a8cc.png
Step 7.gif

Step 8 Lightly lubricate the new Large O-rings (2) using the Grease Packet (5) and install them carefully in the two locations on the outer Cartridge Shell (6). If they are they are positioned in the wrong grooves on the Cartridge Shell (6) the faucet will leak.

 Step 8.gif

We recommend preparing the valve before reinstalling your rebuilt 1225 cartridge.

For information on this process, please review 

Valve Body Cleaning and Flushing.