Symbol 0030 from ISO 7000 - Title/Meaning: Overflow 
Function/description: To indicate the release of the contents of a vessel or a container when the liquid or produce exceeds a permissible or predetermined level (for example, oil overflow, water overflow).
Own work using: iso.org/obp/graphics/grs/8abbb1b2-b283-43f4-8e81-25bdce207a3a 200.png
Vectorization:  Mrmw