When you notice a leak or any other issue on your Moen cartridge faucet, the best option is to completely change the cartridge.
This is not difficult to do and with one or two tools, it gets even easier.
The tool in question is known as a cartridge puller and is fastened with a screw right on the old cartridge.
Hence, the puller can be used to loosen the cartridge and get it out.
There are specific models for Moen, however, generic versions made for a Moen cartridge replacement can be used.
Turn the water off
Close the shutoff valve on the hot and cold water supply lines located under the sink to shut off the supply of water to the faucet.
Rotate the handles of the valve in the clockwise direction till they stop.
In the case where there are no shutoff valves underneath the sink, the supply to the house should be turned off at the main shutoff valve of the home.
Take out the Handle
Use a small, flat screwdriver to remove the faucet handle's decorative cap.
Then, unfasten the screw in the handle cavity and pull the handle from the body of the faucet.
Take out the Faucet clip
Using a utility knife, take out the little retaining clip that holds the cartridge in place.
Then, dip the knife tip into the little hole behind the clip and move the clip by sliding it a bit.
Use pliers or your fingers to take it out.
Note: If a chrome sleeve covers your clip, the sleeve should be removed by pulling it right up. After doing this, you'll have access to the cartridge clip.
Remove the cartridge
The cartridge puller should be inserted over the end of the cartridge.
Then, the puller should be screwed into the hollow threaded end of the stem.
Place the puller in a way that makes it tightly fit into the stem's notches.
Loosen the cartridge by turning the puller from side to side a number of times.
Pull the tool out to remove the cartridge. If it doesn't come out at once, keep turning from side to side as you pull out the cartridge concurrently.
Re-install the Moen Cartridge
If the rubber rings of the new cartridge aren't lubricated, do that by applying a little plumber's grease to the O-rings.
Place the cartridge into the body of the faucet ensuring that the cartridge tabs are aligned with the notches on the faucet.
With the cartridge puller and a wrench, wriggle the cartridge from one side to the other till the clip slides in freely.
Replace the retaining clip with pliers or your hands. If your faucet has a chrome sleeve, re-fit it as well.
Fit the handle back and use its screw to hold it in place. Then, slap the cap back on the handle.
Turn the shutoff valve anti-clockwise right to the end to get the water supply on again. Then, turn on the faucet to test if it works fine.
For more details on a Moen Cartridge Replacement - Click Here!