I actually learned that before at water and sewer technical school, LOL. It's so the lid can't fall down the hole :)
A good opportunity to start talking about system physics and foresight.
Lol yeah, I happened to know that answer.
You can see the Quora answer I linked to for the whole story :)
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I actually learned that before at water and sewer technical school, LOL. It's so the lid can't fall down the hole :)
A good opportunity to start talking about system physics and foresight.
Lol yeah, I happened to know that answer.
You can see the Quora answer I linked to for the whole story :)