Water Sentinel WSF-6 Frigidaire Refrigerator O-Ring
The Water Sentinel WSF-6 is the comparable o-ring for the Frigidaire 218720100 o-ring. The Water Sentinel o-ring WSF-6 seals the filter housing to the refrigerator, and prevents water from leaking into your refrigerator compartment. The o-ring sometimes gets damaged when the filter housing is unscrewed. The o-ring should be replaced if you can see any nicks, tears, or any other damage. The Water Sentinel WSF-6 Refrigerator O-Ring fits Frigidaire refrigerators that use the Frigidaire PureSourcePlus WFCB and Frigidaire PureSource WF1CB water filters.