Abstract: A drain cover and drain cover system are disclosed. The drain cover includes a flange portion that rests on a bottom of a body designed for use with running water, such as a bathtub or shower. The drain cover overlays a drain on the body to prevent water from going down the drain until the water exceeds a predetermined height in the body. Further, the drain cover does not require fasteners to maintain it in place, instead relying upon hydrostatic pressure applied to the drain cover by the water and friction between the drain cover and the body.