What is the hole on the side of the sink closest to you and across from the faucet for, and why do bubbles come out of there? - Quora
![Rusty Drain and Sink Overflow Hole in an Old Porcelain Sink Stock Image - Image of drained, drop: 76155453 Rusty Drain and Sink Overflow Hole in an Old Porcelain Sink Stock Image - Image of drained, drop: 76155453](https://thumbs.dreamstime.com/z/rusty-drain-sink-overflow-hole-old-porcelain-sink-morning-sun-rises-vintage-bathroom-beads-water-collect-76155453.jpg)
Rusty Drain and Sink Overflow Hole in an Old Porcelain Sink Stock Image - Image of drained, drop: 76155453
![plumbing - Why is my bathroom sink leaking around the overflow seal? - Home Improvement Stack Exchange plumbing - Why is my bathroom sink leaking around the overflow seal? - Home Improvement Stack Exchange](https://i.stack.imgur.com/q62H8.jpg)
plumbing - Why is my bathroom sink leaking around the overflow seal? - Home Improvement Stack Exchange
![PF WaterWorks Bathroom Pop-Up Drain with Ball Rod, Transparent ABS Body w/o Overflow, 1.6-2" Sink Hole, Chrome PF0729-CH-TR-NO - The Home Depot PF WaterWorks Bathroom Pop-Up Drain with Ball Rod, Transparent ABS Body w/o Overflow, 1.6-2" Sink Hole, Chrome PF0729-CH-TR-NO - The Home Depot](https://images.thdstatic.com/productImages/f683718c-8060-4607-9854-37858189aa36/svn/chrome-pf-waterworks-sink-hole-covers-pf0729-ch-tr-no-4f_600.jpg)