How to Remove a Corroded Tub Drain Pipe

Removing a corroded tub drain pipe can be a challenging task, but with the right tools and techniques, you can tackle it effectively. Corrosion can cause pipes to become stuck or damaged, making the removal process more difficult. This guide will walk you through the steps to safely and effectively remove a corroded tub drain pipe, along with tips for dealing with common issues.

Tools and Materials You’ll Need

• Pipe wrench or adjustable wrench
• Pipe cutter or hacksaw
• Plumber’s tape
• Pliers
• Bucket or container
• Towels or rags
• Lubricating oil (e.g., penetrating oil or WD-40)
• Replacement pipe and fittings (if needed)

Steps to Remove a Corroded Tub Drain Pipe

1. Prepare the Area

• Turn Off Water Supply: Ensure the water supply to the tub is turned off. This is usually done at the main water shut-off valve.
• Drain the Pipes: Open the tub drain and let any remaining water drain out. Place a bucket or container under the drain to catch any residual water.

2. Inspect the Corroded Pipe

• Check Corrosion: Examine the corroded pipe and fittings to assess the extent of the corrosion. This will help you determine the best approach for removal.

3. Apply Penetrating Oil

• Lubricate Connections: Spray penetrating oil on the corroded connections and allow it to sit for 10-15 minutes. This will help loosen rust and make the removal process easier.

4. Remove the Drain Cover

• Unscrew the Cover: Use a screwdriver or pliers to remove the drain cover from the tub. If the cover is stuck, apply some penetrating oil and use a wrench to gently pry it off.

5. Disconnect the Drain Pipe

• Use a Pipe Wrench: If the drain pipe is connected with threaded fittings, use a pipe wrench or adjustable wrench to unscrew the fittings. Turn the wrench counterclockwise to loosen the connections. If the pipe is stuck, apply additional penetrating oil and try again.
• Cut the Pipe: If the pipe is too corroded to unscrew, use a pipe cutter or hacksaw to cut the pipe into manageable sections. Be cautious not to damage surrounding pipes or fittings.

6. Remove the Corroded Pipe

• Detach the Pipe: Once the connections are loosened or cut, carefully remove the corroded pipe from the tub drain assembly.
• Clean the Area: Remove any debris or corrosion residue from the drain area. Clean the threads and surrounding surfaces to prepare for the installation of a new pipe.

7. Install the New Pipe

• Prepare the New Pipe: Install the new pipe and fittings by threading them into place. Use plumber’s tape on the threads to ensure a watertight seal.
• Tighten Connections: Use a pipe wrench or adjustable wrench to tighten the new fittings. Ensure all connections are secure but avoid overtightening, which can damage the threads.

8. Test for Leaks

• Turn On Water Supply: Restore the water supply and check for leaks around the newly installed pipe. Run water through the tub drain and inspect all connections for any signs of leakage.
• Address Leaks: If you notice any leaks, tighten the connections or add additional plumber’s tape as needed.

Tips for Dealing with Corroded Pipes

1. Be Patient: Corroded pipes can be difficult to work with. Allow ample time for the penetrating oil to work and avoid using excessive force, which can cause additional damage.
2. Safety First: Wear gloves and safety glasses to protect yourself from sharp edges and debris.
3. Consult a Professional: If you encounter significant difficulties or damage, consider consulting a professional plumber for assistance.

Preventive Measures

1. Regular Maintenance: Regularly inspect and maintain your plumbing system to prevent corrosion and other issues.
2. Protect Pipes: Use pipe insulation to protect exposed pipes from moisture and temperature changes that can lead to corrosion.

Conclusion

Removing a corroded tub drain pipe requires careful preparation, the right tools, and patience. By following the steps outlined above, you can effectively address the corrosion issue and ensure a smooth installation of a new pipe. Regular maintenance and preventive measures can help keep your plumbing system in good condition and prevent future problems.