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The Whirlpool WSW-1 is a replacement refrigerator water filter that replaces the following:
The Whirlpool 4396508 Refrigerator Filter Replacement is a carbon block filter. This refrigerator water filter reduces chlorine, tastes and odors from your water. This replacement filter should be replaced every 6 months or 300 gallons.
The Whirlpool WSW-1 specifications: