What’s That Small Hole in Your Bathroom Sink?
Ever notice the small hole near the top of your bathroom sink, just under the faucet? It’s not just a design detail—it’s called an overflow drain, and it serves an important purpose.
Why It’s There
The overflow drain helps prevent flooding if the main drain is clogged or the faucet is left running. It redirects excess water back into the plumbing system, protecting your floors and cabinets from water damage.
How It Works
When water reaches the overflow hole, it flows through a hidden channel inside the sink and drains away—acting as a backup safety feature.
Different Sink Designs
Some sinks have a visible overflow hole, while others hide it for aesthetic reasons. Regardless of style, the function remains the same.
Common Issues
Overflow drains can get clogged with soap scum or debris. If water starts backing up or drains slowly, clean the hole gently with a pipe cleaner or brush.
Maintenance Tips
- Clean the overflow hole occasionally.
- Avoid pouring harsh chemicals down the sink.
- Call a plumber if problems persist.
The Bottom Line
That little hole is a big help. By quietly managing overflow, it helps protect your bathroom from mess and damage. Keep it clean, and it’ll keep working for you.
