Sub Zero 4204490 Water Filter & 7042798 Air Purification Cartridge Combo Pack

Keep your Sub-Zero refrigerator delivering clean water and fresh-smelling air with this genuine OEM combo. The Sub Zero 4204490 Water Filter & 7042798 Cartridge combo gives you both replacement parts in a single purchase, so you can handle your annual refrigerator maintenance in one step.

What's Included

This combo pack contains two genuine Sub-Zero factory replacement parts:

• 1 x Sub-Zero 4204490 Refrigerator Water Filter (water and ice filtration)

• 1 x Sub-Zero 7042798 Air Purification Cartridge (refrigerator air filtration)

Part Number Note: Part number 7007067 and 7042798 are the same air purification cartridge. Sub-Zero updated the part number from 7007067 to 7042798. If your refrigerator manual or a previous filter shows 7007067, order the 7042798. They are the same product.

Compatibility

Sub-Zero 4204490 Water Filter — Compatible Models

The 4204490 water filter fits Sub-Zero Built-In, PRO48, and Integrated refrigerators manufactured after 2011. Compatible with the following Sub-Zero models:

Not sure if your refrigerator uses the 4204490? Check the existing filter cartridge for the part number. It is printed on the cartridge body.

Sub-Zero 7042798 Air Purification Cartridge — Compatible Models

The 7042798 cartridge fits all Sub-Zero refrigerators that include an air purification system. Compatible series include:

Important: Not all Sub-Zero refrigerators include an air purification system. The 200/300, 500, 600, and 700 Series models do not have this system. An air purification system cannot be added to a model that was not originally built with one.

Product Specifications

Sub-Zero 4204490 Water Filter

Sub-Zero 7042798 Air Purification Cartridge

What Does the Sub-Zero 4204490 Water Filter Reduce?

The 4204490 is certified to NSF/ANSI Standards 42 and 53. It is tested to reduce the following contaminants:

• Asbestos

• Atrazine

• Benzene

• Carbofuran

• Chlorine taste and odor

• Cysts

• Dichlorobenzene

• Lead

• Lindane

• Mercury

• Particulates and turbidity

• Toxaphene

Every glass of water and every ice cube passes through this filter before reaching the dispenser. The 750-gallon capacity supports approximately 6 months of typical household use.

For more details on what refrigerator water filters remove and why regular replacement matters, visit our guide on what does a refrigerator water filter remove.

How the Sub-Zero Air Purification System Works

The Sub-Zero air purification system uses a fan inside the refrigerator to circulate air through the 7042798 cartridge approximately every 20 minutes. This continuous cycle works to reduce ethylene gas released by produce and help manage food odors inside the refrigerator compartment.

When the cartridge reaches the end of its service life, the air purification indicator on the control panel begins to flash. A steady indicator light means the system is functioning normally and no action is needed.

How to Install Both Filters

Installing the Sub-Zero 4204490 Water Filter

1. Locate the filter housing inside the refrigerator compartment.

2. Turn the old filter counterclockwise and pull it out.

3. Remove the new 4204490 filter from its packaging.

4. Insert the new filter and turn clockwise until it locks into position.

5. Run approximately 2 gallons of water through the dispenser to flush the new filter.

6. Reset the water filter indicator on the control panel.

Installing the Sub-Zero 7042798 Air Purification Cartridge

1. Grasp the outside cartridge cover from the bottom and rotate it upward to open. (For drawer models, rotate from the top downward.)

2. Grasp the black inner cover from the top and rotate downward. The cartridge will pop out.

3. Remove the old cartridge.

4. Take the new 7042798 cartridge out of its packaging.

5. Insert it with the connector pointing downward.

6. Close the black inner cover, then rotate the outer cover back down until it closes against the back wall.

7. Reset: On the control panel, press and hold PURE AIR for 5 seconds. The indicator will appear in the display but will no longer flash. This confirms the cartridge life cycle has reset for approximately one year.

Both filters install without any tools.

When Should You Replace Each Filter?

4204490 Water Filter

Replace approximately every 6 months or 750 gallons, whichever comes first. Signs it is time to replace:

• Water tastes or smells different than usual

• Water flow from the dispenser is noticeably slower

• The water filter indicator light turns on or begins flashing

7042798 Air Purification Cartridge

Replace when the air purification indicator begins to flash, or after approximately one year. Signs it is time to replace:

• The PURE AIR icon flashes on the control panel

• Food odors inside the refrigerator become more noticeable

• Approximately one year has passed since the last replacement

Replacing both filters together during your annual maintenance visit helps keep your Sub-Zero running as designed. For a detailed guide on signs that your filter needs attention, visit signs your sub zero filter needs replacement.

Why Buy the Combo Pack?

Buying the water filter and air purification cartridge together in one pack has practical advantages:

• One purchase covers both maintenance items for the year

• Genuine OEM parts guaranteed to fit compatible Sub-Zero models

• No compatibility guessing — both parts are factory-matched

• Tool-free installation for both filters

• Save time by handling annual refrigerator maintenance in a single order

Buying the Sub-Zero 4204490 water filter and 7042798 cartridge together ensures you have everything you need for a full year of clean water and fresh refrigerator air.

If you need only the individual air purification cartridge, browse the complete Sub-Zero Water Filter collection to find the right part for your model.

Frequently Asked Questions

What refrigerators does the Sub-Zero 4204490 water filter fit?
The 4204490 fits Sub-Zero Built-In (BI), PRO48, and Integrated refrigerators manufactured in 2011 or later, including the PRO 48, BI-42S, BI-48S, BI-30U, BI-36U, and BI-36F. It also replaces part numbers 4290510 and 9030868.

Is 7007067 the same as 7042798?
Yes. Sub-Zero updated the part number from 7007067 to 7042798. They are the same air purification cartridge. If your refrigerator shows 7007067, the 7042798 is the correct current replacement.

How often should I replace the 4204490 water filter?
Sub-Zero recommends replacing the 4204490 every 6 months or 750 gallons, whichever comes first.

How often should I replace the 7042798 air cartridge?
Replace it when the air purification indicator begins to flash or after approximately one year, whichever comes first.

How do I reset the air purification indicator after replacing the 7042798?
Press and hold the PURE AIR button on the control panel for 5 seconds after installing the new cartridge. The indicator will display but will no longer flash.

Does every Sub-Zero refrigerator use the 7042798 air cartridge?
No. Only the Classic (BI), Designer (IC, IT, ID-30RP, ID-36RP), PRO3650, and PRO4850 series include an air purification system. The 200/300, 500, 600, and 700 Series models do not have this system and do not use this cartridge.

Is this combo pack genuine OEM?
Yes. Both the 4204490 water filter and 7042798 air cartridge in this combo are genuine Sub-Zero factory parts, not compatible replacements.

What contaminants does the 4204490 water filter reduce?
The 4204490 is NSF/ANSI 42 and 53 certified to reduce chlorine taste and odor, lead, cysts, asbestos, mercury, benzene, atrazine, carbofuran, lindane, toxaphene, dichlorobenzene, particulates, and turbidity.

Can I install both filters myself?
Yes. Both filters are designed for tool-free installation. The water filter requires a turn-and-lock motion. The air cartridge uses a rotate-and-click cover system with a 5-second control panel reset.

 

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