Abstract: A drain pan and drainage system is herein disclosed. The drain pan includes a basin with a wall mount connected to the basin. A drain hole is formed in a bottom surface of the basin. The drain pan also includes at least one side panel connecting the basin and the wall mount. The drainage system includes a wall, drain pan and water containing device. The water containing device is mounted to the drain pan and both are mounted to the wall. The water containing device and drain pan are mounted in such a way that the water containing device is at least partially enclosed by the drain pan.