Sub-Zero Refrigerator Filter Combo – 4204490 Water Filter & 7042798 Air Cartridge

Looking for a convenient Sub-Zero refrigerator water and air filter replacement combo? This two-cartridge set includes the Sub-Zero 4204490 water filter and 7042798 air purification cartridge for compatible refrigerators that use both components. The water filter helps improve water taste by reducing chlorine taste and odor, while the air purification cartridge works with the built-in air system to help manage ethylene gas and refrigerator odors. Buying both replacement cartridges together makes routine maintenance easier when both filters are due. Before purchasing, check your existing cartridges or refrigerator documentation to confirm that your appliance requires the 4204490 water filter and 7042798 air cartridge.

Product Details

• Manufacturer: Sub-Zero
• Combo Pack Includes: 1 water filter and 1 air purification cartridge
• Water Filter: 4204490
• Air Purification Cartridge: 7042798
• Previous Air Cartridge Number: 7007067
• Water Filter Purpose: Chlorine taste and odor reduction and particulate filtration
• Air Cartridge Purpose: Helps manage ethylene gas and odors
• Typical Maintenance Schedule: Follow the appliance's filter indicators and manufacturer instructions; both components are generally maintained on an approximately annual schedule
• Application: Compatible Sub-Zero refrigerators requiring both replacement cartridges

Special Features

Convenient Water and Air Filter Replacement

Instead of sourcing two cartridges separately, this Sub-Zero 4204490 and 7042798 combo pack brings both replacement components together. It is a practical option for households planning to replace both filters during the same maintenance period.

Improved Water Taste and Odor

The 4204490 water filter helps reduce chlorine taste and odor while filtering particulates from water. Additional contaminant-reduction performance depends on the substances listed in the manufacturer's performance data and the specified testing conditions.

Built-In Refrigerator Air Purification

The 7042798 air purification cartridge works with compatible Sub-Zero air purification systems to help manage ethylene gas and odors. It is designed for the air purification compartment rather than the drinking-water filtration housing.

Easier Filter Maintenance Planning

Keeping track of both cartridge replacement dates helps you plan future maintenance. Follow the water filter indicator, air purification indicator where provided, and your refrigerator's use and care guide.

Compatibility and Replacement Part Numbers

Compatible Models: Selected Sub-Zero Classic (BI, CL), Designer (IT, IC, DEC, DET), and PRO (648PRO, PRO3650, PRO4850) models, provided the refrigerator uses both specified cartridges.

Water Filter Part Number: 4204490

Air Purification Cartridge Part Number: 7042798

Previous Air Cartridge Number: 7007067

Compatibility Reminder: Confirm both part numbers before ordering. Not every refrigerator that uses the 4204490 water filter also uses the 7042798 air cartridge. Check your existing cartridges, appliance documentation, or Sub-Zero's official compatibility guidance to avoid ordering an unsuitable combo pack.

When Should You Replace Both Filters?

The water filter is designed for up to one year of use, depending on water usage and the manufacturer's instructions. The air purification cartridge is generally replaced approximately every 12 months. Follow the indicators and maintenance guidance for your specific refrigerator, and replace each cartridge sooner if directed by the manufacturer.

Installation Overview

1. Verify the required water and air cartridge numbers.
2. Remove and replace the water filter according to your refrigerator's instructions.
3. Flush the water system if required by the manufacturer.
4. Install the air purification cartridge in its designated compartment.
5. Reset the applicable indicators and record the replacement date.