31. The Little Hole in Your Sink Drain Is There to Prevent Overflow
That extra small hole near the top of your bathroom or kitchen sink isn’t random — it’s an overflow drain. If the main drain gets clogged or you leave the tap running, water escapes through this hole into the overflow pipe instead of spilling all over the floor and causing a flood.
You’ve washed your hands or done dishes thousands of times and never questioned why it was there. Over-35 homeowners who’ve dealt with minor plumbing issues suddenly realize this simple feature has quietly saved them from bigger messes more times than they know. Basic plumbing genius hiding in plain sight.
