Plumbing Basics

How to Clear a Slow Bathroom Sink

Bathroom sinks commonly slow down because hair, soap, and toothpaste collect around the stopper. Start with mechanical cleaning before reaching for harsh chemicals.

Difficulty2/5
Typical time20–60 minutes
Typical cost$0–$25
Beginner-friendly?Usually

Tools you will probably need

  • sink plunger
  • bucket
  • small drain-cleaning tool or zip tool

Materials

  • old towels or rags

Project steps

  1. Remove accessible debris around the stopper and drain opening.
  2. Use a small drain-cleaning tool or remove the stopper if its design allows easy access.
  3. Try a sink plunger while blocking the overflow opening so pressure reaches the clog.
  4. Run water and confirm the drain now clears quickly. Clean and reinstall the stopper.

Common mistakes

  • Mixing drain chemicals with other cleaners
  • Forcing a tool deep into piping without knowing the layout
  • Taking apart the trap without a bucket underneath

When to call someone

Call a plumber if several fixtures are draining slowly, sewage odors are present, the clog quickly returns, or the blockage is beyond the accessible trap.

Not sure whether this is a good first project for you?
Run it through the DIY Project Planner.

Project costs and times are rough planning estimates. Product instructions, local codes, home construction, and actual conditions take priority.