I know that it has been 9 months since the last post, but I thought that I would share my observation.

I filled my bathtub with about 6 inches of water, and turned the plug (I can't pull it out), and I could not see any direction to the water flowing out...even when I stirred the water clockwise, or counter clockwise.

So my vote would have to be straight down.

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Prediction is very difficult, especially about the future.

--Niels Bohr, Danish Physicist.