Stormwater - Wikipedia
 in the storm drain pipes. [...] : r/thisisthatthing](https://i.redd.it/ayq1ky7lpwrb1.jpg "Maybe it is to provide a way for air to escape from a storm drain to prevent an [air lock](https://en.wikipedia.org/wiki/Air_lock) in the storm drain pipes. [...] : r/thisisthatthing")
Maybe it is to provide a way for air to escape from a storm drain to prevent an [air lock](https://en.wikipedia.org/wiki/Air_lock) in the storm drain pipes. [...] : r/thisisthatthing
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