The Sub-Zero 7023812 Replacement Refrigerator Water Filter is a carbon block water filter built specifically for older Sub-Zero refrigerator models with serial numbers prior to 4116297. Designed for use in harsh or low-quality water conditions, it reduces chlorine taste and odor, nominal particulate Class III, and sediment, keeping water and ice tasting clean for up to 12 months after installation. Check the serial number sticker inside the refrigerator door before ordering to confirm the 7023812 is the correct filter for the specific unit. Specification Material: Activated carbon block Product Dimensions: Fits standard Sub-Zero filter housing for pre-4116297 serial number models Filter Capacity: Up to 300 gallons Filter Life: Up to 12 months External Testing Certification: NSF/ANSI Standard 42 Contaminants Reduced: Chlorine taste and odor, nominal particulate Class III, sediment Brand: Sub-Zero Part Number: 7023812 Related Part Numbers: 7023811, 7023816, 7009931, 7005017 Bypass Plug: Part number 7011209 available separately if bypass mode is required Batteries Required: No Key Features Serial Number Specific Compatibility: Fits Sub-Zero refrigerators with serial numbers prior to 4116297 only. Models with serial numbers at or above 4116297 use the 4204490 filter system instead. Always verify the serial number before ordering. Built for Harsh Water Conditions: Designed by Sub-Zero specifically for homes with harsh or low-quality water, including high sediment environments where more frequent replacement may be needed ahead of the standard 12 month schedule. NSF 42 Certified Filtration: Independently tested and certified against NSF/ANSI Standard 42 for reduction of chlorine taste and odor and nominal particulate Class III. 12 Month Service Life: Rated for up to 12 months or 300 gallons, one of the longer replacement cycles in the Sub-Zero filter lineup and aligned with Sub-Zero's official annual replacement guidance. Bypass Mode Available: The system can be placed in bypass mode if a filter is not in use. A separate bypass plug, part number 7011209, is required and available directly from Sub-Zero. No Shelf Life Limitation: Sub-Zero confirms this filter carries no shelf life restriction. Store in a cool, dry environment before installation to preserve carbon block integrity. Replace your Sub-Zero 7023812 water filter for cleaner, better-tasting water and ice in your older Sub-Zero refrigerator.
