## How to Fix a Leaky Third Faucet in a Kitchen Sink
### Introduction
A leaky faucet can be a frustrating and wasteful problem. If you have a third faucet in your kitchen sink, it can be even more challenging to fix. This guide will provide you with step-by-step instructions on how to fix a leaky third faucet in a kitchen sink.
### Tools and Materials
Before you begin, you will need to gather the following tools and materials:
* Adjustable wrench
* Channel lock pliers
* Screwdriver
* New faucet cartridge (if necessary)
* Plumber’s putty
* Teflon tape
### Step-by-Step Instructions
**1. Turn off the water supply.**
The first step is to turn off the water supply to the faucet. There will be two shut-off valves under the sink, one for the hot water and one for the cold water. Turn both valves clockwise until they are fully closed.
**2. Remove the aerator.**
The aerator is the small attachment at the end of the faucet. It can be removed by unscrewing it by hand or using a pair of channel lock pliers.
**3. Remove the handle.**
There will be a small screw holding the handle in place. Use a screwdriver to remove the screw and then pull the handle straight off.
**4. Remove the packing nut.**
The packing nut is located behind the handle. Use an adjustable wrench to loosen the packing nut and then remove it by hand.
**5. Remove the cartridge.**
The cartridge is the part of the faucet that controls the flow of water. Pull the cartridge straight out of the faucet body.
**6. Inspect the cartridge.**
Look for any signs of damage or wear on the cartridge. If the cartridge is damaged, it will need to be replaced.
**7. Install the new cartridge.**
If the cartridge is damaged, replace it with a new one. Insert the new cartridge into the faucet body and push it in until it is fully seated.
**8. Reinstall the packing nut.**
Hand-tighten the packing nut onto the faucet body. Use the adjustable wrench to further tighten the packing nut, but be careful not to overtighten it.
**9. Reinstall the handle.**
Slide the handle back onto the faucet body and secure it with the screw.
**10. Reinstall the aerator.**
Screw the aerator back onto the end of the faucet.
**11. Turn on the water supply.**
Turn on the hot and cold water shut-off valves under the sink. Check for any leaks around the faucet. If there are any leaks, tighten the packing nut or replace the cartridge.
### Additional Tips
* If the leak is coming from the base of the faucet, you may need to replace the O-rings. O-rings are small rubber gaskets that create a seal between the faucet body and the handle.
* If the leak is coming from the hose that connects the faucet to the water supply, you may need to replace the hose.
* If you are not comfortable fixing the faucet yourself, you can call a plumber for assistance.
### Conclusion
Fixing a leaky third faucet in a kitchen sink can be a simple task that can be completed in a few minutes. By following the steps outlined in this guide, you can save yourself time and money.