The small hole on the sink, which seems unnecessary actually has a surprising function

3. Helps During Clogs

In some cases, if the main drain is slow, water can temporarily drain through the overflow hole — giving you a bit more time to fix the clog before disaster strikes.

Why Some Sinks Don’t Have One

Not all sinks come with an overflow hole — especially in modern minimalist designs or certain vessel sinks. If your sink doesn’t have one:

• Be extra careful not to leave running water unattended.
• Consider installing a drain stopper with overflow protection.
• Always monitor children closely when using such sinks.

How to Clean It

That little hole can get surprisingly dirty. Here’s a quick way to keep it clean:

1. Use a small brush or pipe cleaner dipped in vinegar to scrub the inside.
2. Flush it with hot water or a gentle baking soda and vinegar mixture.
3. Avoid using harsh chemicals, which could damage the internal plumbing.

Cleaning it once every few months helps prevent unpleasant smells and bacteria buildup.

Final Thoughts

That tiny hole near the top of your sink may not look like much, but it plays a critical role in keeping your home dry and your plumbing running smoothly. So next time you’re brushing your teeth or rinsing dishes, take a second to appreciate this clever little design feature.

It’s a small hole — with a big job.

Want more surprising home design secrets or tips for maintaining your plumbing? Let me know — I can help you put together a whole series!