How to Replace a Moen Faucet Cartridge (Step-by-Step, 2026)
A dripping Moen faucet almost always means the cartridge needs replacing. The good news: Moen's cartridge replacement is straightforward, and Moen will send you a free replacement cartridge under their lifetime warranty. This guide walks you through the process.
Tools & Materials
- Moen cartridge puller tool (or large pliers)
- Flathead screwdriver
- Allen wrench (for handle screw)
- Plumber's grease
- Towels
Safety Notes
- Always shut off water before removing the cartridge.
- Note the orientation of the old cartridge before removal (hot/cold sides).
Step-by-Step Instructions
Shut Off Water Supply
Turn off the hot and cold shut-off valves under the sink. Open the faucet to release pressure.
Remove the Handle
Pop off the decorative cap on the handle. Use an Allen wrench to remove the handle screw. Lift the handle off.
Remove the Retaining Clip
Locate the U-shaped retaining clip on the cartridge. Use a flathead screwdriver to pry it out. Set it aside.
Pull Out the Old Cartridge
Use the Moen cartridge puller tool. Twist back and forth while pulling straight up. If stuck, apply penetrating oil and wait 15 minutes.
Install the New Cartridge
Apply a thin coat of plumber's grease to the O-rings on the new cartridge. Slide it into the valve body, aligning the tabs. Press firmly until seated.
Reassemble and Test
Replace the retaining clip, handle, and decorative cap. Turn on the water supply. Test for leaks and proper hot/cold operation.
Common Mistakes to Avoid
- Installing the new cartridge 180 degrees off, reversing hot and cold.
- Forgetting the retaining clip, which allows the cartridge to push out under pressure.
- Not greasing the O-rings, causing a tight fit and potential damage.
Troubleshooting
Hot and cold are reversed after replacement
Remove the cartridge and rotate it 180 degrees.
Cartridge is stuck and will not come out
Use the Moen cartridge puller tool with penetrating oil. Let it soak for 15-30 minutes. Apply even pressure while twisting.
FAQ
How do I get a free replacement cartridge from Moen?
How do I know which Moen cartridge I need?
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