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

The small hole on the sink, which seems unnecessary actually has a surprising function | November 21, 2025

🚰 The Small Hole on Your Sink That Seems Unnecessary Actually Has a Surprising Function

Have you ever noticed that tiny hole near the top of your bathroom or kitchen sink — the one that never seems to do anything? Most people assume it’s just part of the design, or worse, that it’s pointless.

But that little opening actually serves a very important purpose, and knowing what it does might save you from some messy (and costly) plumbing problems in the future.