1. Assemble the Required Tools:
- Flat-head screwdriver
- Phillips-head screwdriver
- Adjustable wrench
- Pliers
2. Turn off the Water Supply:
- Locate the water supply valves under the sink or behind the faucet.
- Turn the valves clockwise to shut off the hot and cold water supply.
3. Disconnect the Supply Hoses:
- Use the adjustable wrench to loosen the nuts connecting the supply hoses to the faucet.
- Disconnect the hoses by hand and place them in a container to catch any dripping water.
4. Remove the Handle:
- Use the flat-head screwdriver to pry off the plastic cap covering the handle screw.
- Use the Phillips-head screwdriver to loosen the handle screw.
- Pull the faucet handle straight up to remove it.
5. Remove the Escutcheon:
- Use the flat-head screwdriver to pry off the plastic cap covering the escutcheon screws.
- Use the Phillips-head screwdriver to remove the escutcheon screws.
- Lift the escutcheon up to remove it.
6. Access the Cartridge:
- You'll see the faucet cartridge located behind the escutcheon.
7. Remove the Cartridge:
- Use the pliers to grasp the cartridge and turn it counterclockwise to loosen it.
- Pull the cartridge out of the faucet body.
8. Inspect and Replace:
- Inspect the cartridge for any damage or wear. If needed, replace it with a new Moen 1225 cartridge.
9. Reassemble:
- Insert the new cartridge into the faucet body and turn it clockwise to secure it.
- Reinstall the escutcheon and secure it with the screws.
- Reattach the faucet handle and secure it with the screw.
- Reconnect the supply hoses and tighten the nuts.
- Turn on the water supply and check for leaks.