Symbol 3610 from ISO 7000 - Title/Meaning: Toilet, light flush Function/description: On toilet equipment: To identify the control to flush the toilet with a small amount of water after urination
Additional information: 
The control is generally a button or lever located on the wall in the cubicle, the side of the toilet tank, or the control panel of the spray seat.
Own work using: iso.org/obp/graphics/grs/9b38f9dd-4d09-479a-a028-ebfab691e51f 200.png
Vectorization:  Mrmw