What are the holes in the pictures called? They are usually found in sinks and tubs and their function is to prevent water from overflowing.
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What are the holes in the pictures called? They are usually found in sinks and tubs and their function is to prevent water from overflowing.
Best Answer
Although I see nothing wrong with overflows proposed by the answers and people casually call it that way, since I see in the comments that it technically refers to the whole system, I'd like to suggest the compound noun overflow holes. I did a search and found out it's actually quite common. I found some posts in Home Improvement Stack concerning these holes, too.
There is even a cover which blocks the hole called overflow hole cover for cosmetic purposes (as JimmyJames mentioned in his comment). Besides, you might want to consider overflow drain that I already mentioned under Colin Fine's answer.
(Whole credit, though, should go to Colin Fine because he was the first to post the word overflow and made me go for it)