Sink repair and installation can vary in complexity depending on the issue at hand or the type of sink being installed.

You should call a plumber to repair or replace your sink in the following situations:

1. Leaking Sink: If you notice water pooling under or around the sink, it may indicate a leak that needs professional attention.

2. Clogs: Persistent clogs that don’t respond to home remedies or plungers can require a plumber's expertise.

3. Damaged Pipes: If you see visible damage, rust, or corrosion on the pipes connected to your sink, it’s time to call a professional.

4. Unpleasant Odors: Foul smells coming from the sink can signal a deeper plumbing issue, like a broken seal or vent problem.

5. Low Water Pressure: If the water flow is significantly reduced, it may be a sign of a plumbing issue that needs assessment.

6. Age of the Sink: If your sink is old and showing signs of wear, it might be more cost-effective to replace it rather than keep repairing it.

7. Renovations: If you’re remodeling your kitchen or bathroom, a plumber can help with the installation of a new sink.