A refrigerator having a water circulation and drainage system includes a fresh food compartment with a liner and a drain, an icemaker system having an ice forming cavity with a draining mechanism, and an ice storage bin coupled to a drain line for draining excess liquid from the ice storage bin. The water circulation and drainage system includes a water tank having an inlet port and an overflow device for draining water. The system also includes a drainage tank having a first water tank inlet port for receiving water from the overflow device of the water tank, a second water inlet port for receiving water from the ice storage bin, and a third inlet port for receiving water from the liner.