## How to Replace Piping Under Kitchen Sink
Replacing the piping under your kitchen sink is a relatively simple plumbing task that can be completed in a few hours. However, it is important to follow the steps carefully to avoid any leaks or damage.
### Tools and Materials
* Adjustable wrench
* Plumber’s putty
* Teflon tape
* Hacksaw
* Utility knife
* New piping
* Pipe cutter (optional)
### Step-by-Step Instructions
1. **Turn off the water supply.** The first step is to turn off the water supply to your sink. There are usually two shut-off valves located under the sink, one for the hot water and one for the cold water. Turn both valves clockwise to shut off the water.
2. **Disconnect the old piping.** Once the water is turned off, you can disconnect the old piping. Use an adjustable wrench to loosen the nuts that connect the piping to the sink and the water supply lines. Be careful not to over-tighten the nuts, as this can damage the piping.
3. **Clean the pipes.** Once the old piping is disconnected, you can clean the pipes. Use a utility knife to remove any old sealant or debris from the pipes. Then, apply a small amount of plumber’s putty to the threads of the pipes.
4. **Install the new piping.** Take the new piping and insert it into the sink drain. Hand-tighten the nuts that connect the piping to the sink. Then, use an adjustable wrench to tighten the nuts further, but be careful not to over-tighten them.
5. **Connect the water supply lines.** Once the new piping is installed, you can connect the water supply lines. Apply a few wraps of Teflon tape to the threads of the water supply lines. Then, screw the water supply lines into the new piping. Tighten the nuts until they are snug, but be careful not to over-tighten them.
6. **Turn on the water supply.** Once the water supply lines are connected, you can turn on the water supply. Check for any leaks at the connections. If you find any leaks, tighten the nuts further.
### Tips
* If you are not comfortable replacing the piping yourself, you can hire a licensed plumber to do it for you.
* Before you start working, make sure you have all of the necessary tools and materials.
* Be careful not to over-tighten the nuts on the piping. This can damage the piping and cause leaks.
* If you are replacing the piping because of a leak, be sure to check the other pipes in your home for leaks as well.
* If you have any questions, consult a plumbing professional.
### Troubleshooting
* **If you have a leak at the connection between the piping and the sink, tighten the nuts further.** Be careful not to over-tighten the nuts, as this can damage the piping.
* **If you have a leak at the connection between the water supply lines and the piping, tighten the nuts further.** Be careful not to over-tighten the nuts, as this can damage the piping.
* **If you have a leak at the connection between the piping and the drain, apply a small amount of plumber’s putty to the threads of the piping.** Then, hand-tighten the nuts that connect the piping to the drain. Finally, use an adjustable wrench to tighten the nuts further, but be careful not to over-tighten them.