Performing drain line repair and testing involves identifying issues, making necessary repairs, and ensuring the system functions properly. Here’s a general guide:

**1. Identify the Issue:

• Diagnose the problem by inspecting the drain line. Look for leaks, clogs, or damaged sections. Use a plumbing snake or camera to locate blockages or damages that might be hidden.

2. Gather Tools and Materials:

• Collect the necessary tools and materials, which may include a plumbing snake, pipe wrench, pipe cutter, replacement pipes, pipe glue (for PVC pipes), pipe sealant, and safety gear.

3. Turn Off Water Supply:

• Before starting any repair, turn off the water supply to the affected area. For drain lines, this may involve shutting off the main water supply or isolating the specific section.

4. Clear Blockages:

• If the issue is a clog, use a plumbing snake or auger to clear the blockage. Insert the snake into the drain and rotate it to break up or pull out the obstruction.

5. Cut and Replace Damaged Sections:

• If there are damaged or corroded sections, use a pipe cutter to remove the affected area. Replace it with a new section of pipe, ensuring a proper fit. Secure connections with appropriate fittings.

6. Apply Sealant (if needed):

• If working with PVC pipes, apply pipe glue to the joints for a secure and leak-free connection. If using other types of pipes, use the recommended sealant.

7. Test for Leaks:

• Turn the water supply back on and carefully inspect the repaired area for leaks. Check joints, connections, and the entire length of the drain line.

8. Conduct a Drain Test:

• Pour water down the drain to ensure it flows smoothly. Monitor for any signs of slow drainage, gurgling, or backup, which could indicate further issues.

9. Inspect Surrounding Areas:

• Check the surrounding areas for water damage or signs of leaks. Look for water stains, mold, or mildew.

10. Clean Up:

• Once you’re confident that the repair is successful and there are no leaks, clean up the work area. Dispose of any debris properly.

11. Document and Maintain:

• Document the repairs made and keep a record for future reference. Consider implementing preventive measures to avoid similar issues in the future.

If you’re unsure about handling drain line repair and testing on your own, it’s advisable to consult with a professional plumber to ensure the job is done accurately and to local plumbing codes.