Turn off the water supply to the sink.
Cover the teeth of the wrench with electrical tape and remove the aerator and scrub the it clean with a toothbrush or replace. Replace the washers and o-rings during reassembly.
If the leak is not at the top of the faucet, but at the handle, then you probably need to replace the cartridge.
Remove the handle screw of your faucet, using an Allen wrench.
Unscrew the dome. Unscew the connector screw to remove the connector and handle stop
Unscrew the nut using a wrench and remove the clip with pliers. Using the \Moen repair kit, place the plastic cap tool, found in the kit, on the cartridge so that it lines up and covers the "ears." Wiggle the cap using the pliers to grip it, to undo the cartridge. Take the cap off and pull the cartridge straight out.
Push the new cartridge straight in, lining it up precisely with the clip notches. Reverse the steps that you took to disassemble the handle to reassemble it. Tighten the screws securely.
Things You Will Need
- Electrical tape
- Locking wrench
- Moen replacement/repair kit
- Allen wrench
- Moen suggests that you also wear safety goggles while attempting repairs.
- To troubleshoot your leak, turn on the faucet and watch the flow of the water. Once you turn it off, wait a few minutes. If it continues to drip, then the trouble is in the top faucet itself and you need to replace the washer, o-rings and clean or replace the aerator