i think its clock wise.

it actually depends on any initial movement in the water, hemispheres don't really affect it

Technically, if you were to do a study on it you would find that water would go down the drain either way about an equal number of times. The clockwise/counterclockwise thing is just an over-application of physics that isn't really truthful.

Clockwise in the northern hemisphere. Clockwise in the southern hemisphere. Unless the shape of the bowl makes it go the other way, then its still the same in both hemispheres,....just counter-clockwise.

I just did an experiment and found the answer. I put a sheet of tissue paper in the toilet and flushed it. I did this several times to confirm what I saw. I observed, the tissue paper circulating around the bowel as it was going down in a COUNTERCLOCKWISE motion! I live in the Northern Hemisphere.

Clockwise and anti clockwise in the Southern Hemisphere It is true I tested it in Australia

I have no idea, but for some reason I found this question funny...

It has more to do with the shape of your sink, the size of the drain and the amount of water going into the drain than the hemispheres. The physics is correct, but only on a large scale (which does not include sink/toilet). Have some references for further info... http://www.ems.psu.edu/~fraser/Bad/BadCoriolis.html http://www.usatoday.com/weather/resources/basics/coriolis-understanding.htm

What you are referring to is known as the Coriolis force. This is a force that is caused by the rotation of the earth on it's axis. If you look down from the N. Pole you would see the Earth rotate counterclockwise, from the S. Pole it would be clockwise. The Coriolis Force DOES cause hurricanes and cyclones to rotate one way or the other depending on N. or S. hemispheres, however, sinks and toilets are FAR TOO SMALL TO BE AFFECTED BY THE CORIOLIS!! The force is strongly outweighed by the tiniest design flaws in sinks and toilets. Also the size of the drain, the amount of liquid and the presence of ANY disturbance (vibration, how level the drain is, etc.) are much more of an influence on drain direction. It would be nearly impossible to set up a well controlled test rig. The liquid would have to be absolutely still before beginning. Merely lifting one side of the plug out of the drain sooner than the other would influence the outcome. The reason that the Coriolis force does not affect direction of liquid in drains is that it only works on LARGE things like storms. Bear in mind, like storms which rotate slowly, the 24 hours it takes for rotation of the earth is far too slow to have any influence on such small masses of liquids which drain in a matter of seconds. This is indeed a tricky question because the physics is good, in theory it should have an effect but the reality is quite different. It's actually a matter of scale. If you had a drain the size of Texas, the Coriolis force would have an effect and which hemisphere it is in would determine the rotation!

Not for nothing, but how hard would it be to check this for yourself. If your in the southern Hemisphere just no its said to be the opposite.