A phenomenon called the 'Coriolis Effect' Causes different rotation directions in different part of the world. The Coriolis force is so subtle that other rotetional forces can easily overcome it, causing the water to swirl in either direction. So yes! Theoretically, draining water swirls clockwise north of the equator and counterclockwise south of the equator but the effect is so minimal you would probably not be able to see it