Jim Shooz
Veteran Member
The design of the container holding the water doesn't have much effect. I've just filled and drained both kitchen sinks (different sizes and shapes) the Laundry sink and the Bathroom sink. All 4 sinks were filled and left until there was no water movement from the filling. the sinks were plastic or stainless steel.
In all instances the water rotated clockwise.
In all instances the water rotated clockwise.