Sub-Zero 4204490 Water Filter Replacement for 4204490, 4290510 (2-Pack)

Maintain your compatible Sub-Zero refrigerator’s water filtration system with this 4204490 water filter 2-pack. Designed for select Sub-Zero Classic, Designer, and PRO series refrigerators, these replacement cartridges help reduce chlorine taste and odor, particulates, and other specifically tested contaminants in water supplied to the refrigerator’s dispenser and ice maker.

Each cartridge is rated for up to 750 gallons of water or 12 months of use, whichever comes first. Buying a two-pack gives you an additional replacement cartridge for future maintenance, helping you prepare for the next scheduled filter change.

Specifications

• Brand: Sub-Zero
• Part Number: 4204490
• Pack Quantity: 2 water filter cartridges
• Filter Type: Refrigerator water filter
• Installation Style: Twist-in
• Interchangeable Part Number: 9030868, 4290510
• Rated Capacity: Up to 750 gallons per cartridge
• Replacement Interval: Up to 12 months per cartridge, or sooner when indicated
• Compatible Series: Select Classic, Designer, and PRO refrigerators

Filtration Performance

The Sub-Zero 4204490 filtration system has been tested and certified by NSF International against NSF/ANSI Standards 42 and 53 for specified contaminant-reduction claims.

Chlorine Taste and Odor

Helps reduce chlorine taste and odor, supporting better-tasting drinking water and ice.

Particulate Reduction

Tested for reduction of Particulate Class I, helping reduce specified particles in the water.

Reduction of Additional Tested Contaminants

Under the specified test conditions, the system is certified for reduction of lead, mercury, atrazine, benzene, carbofuran, 1,4-dichlorobenzene, lindane, toxaphene, turbidity, cysts, and asbestos.

Filtration performance applies to the substances listed in the manufacturer's performance data. Actual results can vary depending on incoming water quality and operating conditions. This system should not be used with microbiologically unsafe water or water of unknown quality without adequate disinfection.

Refrigerator Compatibility

The 4204490 twist-in water filter is listed for compatible models in these Sub-Zero series:

• Classic Series: BI and CL
• Designer Series: IT, IC, DEC, and DET
• PRO Series: 648PRO, PRO3650, and PRO4850

Replacement reference: 9030868, 4290510

Important compatibility note: Some older Classic BI refrigerators use a different push-in filter. Check the number on your existing cartridge or use Sub-Zero’s filter finder with your refrigerator’s serial number before ordering.

Installation and Filter Care

1. Confirm that your refrigerator uses the 4204490 twist-in cartridge.
2. Follow the appliance’s instructions to remove the existing filter and install the replacement.
3. After installation, flush the system according to the owner’s manual. Sub-Zero advises dispensing several glasses of water for about two minutes on dispenser models. For models without a dispenser, discard the first two full containers of ice.
4. Reset or reactivate the filter monitor if required by your refrigerator model.

Replace the cartridge when the filter indicator signals a change, when water flow noticeably decreases, or when the ice becomes hollow, as applicable to your model. Do not exceed the manufacturer's recommended replacement interval.