The ultimate guide to fixing clogged kitchen drains: how to use pvc pipe to create a free-flowing drain

Connecting PVC pipe to a kitchen sink drain may seem like a daunting task, but with the right tools and a step-by-step approach, it can be a breeze. This comprehensive guide will empower you with the knowledge and confidence to tackle this plumbing project like a pro.

Materials You’ll Need:

• PVC pipe (1-1/2 inches in diameter)
• PVC cutter
• PVC primer
• PVC cement
• Slip joint nut
• Washer
• Sink drain flange
• Plumber’s putty

Step-by-Step Instructions:

1. Preparing the Drain Pipe:

• Measure the distance from the sink drain outlet to the desired location for the PVC pipe connection.
• Cut the PVC pipe to the measured length using a PVC cutter.

2. Applying Primer and Cement:

• Apply a thin layer of PVC primer to the inside of the PVC pipe and the outside of the sink drain flange.
• Allow the primer to dry for a few minutes.
• Apply a thin layer of PVC cement to both surfaces.

3. Joining the Pipe and Flange:

• Insert the PVC pipe into the sink drain flange.
• Rotate the pipe slightly while pushing it in to ensure a secure connection.
• Hold the connection for a few minutes to allow the cement to set.

4. Installing the Slip Joint Nut:

• Place a washer over the PVC pipe and slide it up to the sink drain flange.
• Screw the slip joint nut onto the washer and hand-tighten it.
• Use a wrench to tighten the nut further, but avoid overtightening.

5. Sealing the Connection:

• Apply plumber’s putty around the base of the sink drain flange.
• Press the putty into place to create a watertight seal.

6. Connecting to the Drain:

• Connect the PVC pipe to the kitchen sink drain by sliding it into the outlet.
• Tighten the slip joint nut on the pipe to secure the connection.

7. Testing the Connection:

• Turn on the water at the sink and check for any leaks.
• If there are no leaks, the connection is complete.

Troubleshooting Tips:

• If you encounter a leak, check the following:
• Ensure the primer and cement were applied properly.
• Inspect the slip joint nut for tightness.
• Check the plumber’s putty seal for any gaps or cracks.

Frequently Asked Questions:

1. Can I use PVC glue instead of cement?
No, PVC glue is not recommended for drain connections as it does not create a strong enough bond.

2. How long should I wait before using the sink after connecting the PVC pipe?
Allow at least 24 hours for the cement to fully cure before using the sink.

3. Can I connect PVC pipe to a cast iron drain?
Yes, but you will need a rubber adapter that fits over the cast iron drain and connects to the PVC pipe.

4. What size PVC pipe should I use for a kitchen sink drain?
Typically, 1-1/2 inch diameter PVC pipe is used for kitchen sink drains.

5. How do I prevent the PVC pipe from sagging?
Use a pipe hanger or bracket to support the PVC pipe and prevent it from drooping.

6. Can I use PVC pipe for outdoor drain connections?
Yes, but use Schedule 40 or Schedule 80 PVC pipe, which is more durable and resistant to sunlight and temperature fluctuations.

7. What is the difference between slip joint nuts and compression nuts?
Slip joint nuts are used to connect pipes of different sizes, while compression nuts are used to create a watertight seal on a single pipe.

8. How do I clean a clogged PVC drain pipe?
Use a drain snake or chemical drain cleaner to clear the blockage.

9. Can I paint PVC pipe?
Yes, but use a primer specifically designed for PVC pipes and choose a paint that is resistant to moisture and fading.

10. How do I repair a cracked PVC drain pipe?
Cut out the damaged section and replace it with a new piece of PVC pipe using the steps outlined above.