The HAF-CIN is a water filter from Samsung that fits all current Samsung refrigerators except models of RF18, RF220, RF221, RT18M, and RF23M8090. Recommended replacement is every six months. For SxS, the filter is inserted at the bottom right corner of the fresh food compartment, and for 3-door & 4-door it is inserted at the middle bottom portion in-between the crispers in the fresh food compartment. | Samsung Water Filter Replacement (HAF-CIN)