✗ The myth everyone repeats
Toilet water swirls clockwise in Northern Hemisphere and counterclockwise in Southern Hemisphere due to Coriolis effect.
✓ What is actually true
Coriolis effect is far too weak at toilet scale. Bowl design, inlet design, and initial water motion determine swirl direction. Coriolis is negligible compared to these factors.
Reception
The receipts 2 sources
- Coriolis Effect ScalePRIMARY
- Toilet Fluid DynamicsREFERENCE