Keeping your Sub-Zero refrigerator at its best means making sure both your water filtration and air purification are working together at full capacity. The 4204490 water filter and 7042798 air cartridge combo pack covers both in a single purchase, making annual maintenance simpler and more cost-effective for compatible Sub-Zero refrigerator models.
The 4204490 is NSF 42 and 53 certified to reduce chlorine taste and odor, lead, and other common contaminants, while the 7042798 air cartridge works continuously inside the refrigerator compartment to reduce food odors and ethylene gas that accelerates produce spoilage. Shop the Sub-Zero 4204490 and 7042798 combo pack below and confirm both part numbers against your refrigerator model before ordering to get the correct fit first time.
Find the Right Sub-Zero Combo Pack
Not sure if this is the right combo pack for your Sub-Zero refrigerator? Here is a quick reference to help you confirm before you buy.
|
Filter / Cartridge |
Fits / Replaces |
Best For |
|
4204490 Water Filter |
Select Sub-Zero refrigerator models |
Standard water filter replacement |
|
7042798 Air Cartridge |
Select Sub-Zero refrigerators, newer generation |
Standard air purification replacement |
|
4204490 + 7042798 Combo |
Compatible Sub-Zero models requiring both cartridges |
Best value annual dual filtration replacement |
Always confirm both part numbers printed on the existing filter and cartridge or inside the housing slots before ordering. Sub-Zero filter and cartridge designs vary across model generations and are not universally interchangeable within the Sub-Zero lineup.
Compatible Sub-Zero Refrigerator Models
The 4204490 water filter and 7042798 air cartridge combo pack is compatible with a range of Sub-Zero refrigerator configurations including:
- Sub-Zero BI-36U
- Sub-Zero BI-42S
- Sub-Zero BI-48S
- Sub-Zero BI-48SD
- Sub-Zero PRO 48
- Sub-Zero B136S
- Sub-Zero Classic Series refrigerators
- Sub-Zero Designer Series refrigerators
- Sub-Zero Integrated Series refrigerators
- Sub-Zero Built-in Series refrigerators
Always verify compatibility against your specific refrigerator model number before ordering. This list is representative and not exhaustive across all Sub-Zero configurations.
Why Buy the Sub-Zero 4204490 & 7042798 Combo Pack?
Buying the combo pack instead of replacing each cartridge separately saves time, simplifies your annual maintenance schedule, and ensures both filtration systems are refreshed at the same time. Here is what you get with the 4204490 and 7042798 combo pack:
- NSF 42 and 53 certified water filtration for verified reduction of lead, heavy metals, and chlorine taste and odor
- Activated carbon block water filtration for consistent VOC and contaminant reduction through the full 300 gallon service life
- Activated carbon air purification that targets food odors and ethylene gas at the source rather than masking them
- Reduces ethylene gas released by ripening fruits and vegetables that accelerates spoilage in nearby produce
- Dual filtration coverage addressing both dispensed water quality and refrigerator air quality in a single order
- Tool-free installation for both cartridges with no plumbing or specialist knowledge required
- Shared 12 month service life simplifying annual maintenance to a single replacement event
- Best value option for households replacing both cartridges on the same annual cycle
Sub-Zero 4204490 & 7042798 Combo Pack Specifications
- Product Name: Sub-Zero 4204490 Water Filter & 7042798 Air Cartridge Combo Pack
- Water Filter Part Number: 4204490
- Air Cartridge Part Number: 7042798
- Water Filter Certification: NSF 42 and 53
- Water Filter Capacity: 300 gallons
- Water Filter Life: Up to 12 months
- Air Cartridge Life: Up to 12 months
- Flow Rate: 0.5 GPM
- Operating Temperature: 33 to 100 degrees Fahrenheit
- Working Pressure: 30 to 120 PSI
- Filter Media: Activated carbon block (water filter); activated carbon (air cartridge)
- Installation Type: Tool-free for both cartridges
- Compatible Models: Select Sub-Zero refrigerators requiring both the 4204490 and 7042798 cartridges
4204490 & 7042798 Combo vs 4204490 & 7007067 Combo
This is the most important section if you are unsure which Sub-Zero combo pack to order.
|
4204490 & 7042798 Combo |
4204490 & 7007067 Combo |
|
|
Water Filter |
4204490 |
4204490 |
|
Air Cartridge |
7042798 |
7007067 |
|
Air Cartridge Generation |
Newer Sub-Zero models |
Earlier Sub-Zero models |
|
Water Filter Certification |
NSF 42 and 53 |
NSF 42 and 53 |
|
Interchangeable |
No |
No |
|
Installation Type |
Tool-free for both |
Tool-free for both |
|
Service Life |
12 months for both |
12 months for both |
|
Best For |
Buy for newer generation Sub-Zero models |
Buy for earlier generation Sub-Zero models |
How do I check which combo pack my refrigerator needs?
Check the part numbers printed on both the existing water filter and air cartridge currently installed in your refrigerator. If the air cartridge shows 7042798, this is the correct combo pack to order. If it shows 7007067, the 4204490 and 7007067 combo pack is the correct replacement for your unit.
What happens if I order the wrong combo pack?
The water filter component is the same 4204490 in both combo packs so a mismatch will only affect the air cartridge. An incorrectly ordered air cartridge will not seat properly in the housing and will not deliver effective air purification. Always confirm the air cartridge part number on the existing cartridge before placing your order.
How Often Should You Buy a Replacement Sub-Zero 4204490 & 7042798 Combo?
Order a fresh combo pack every 12 months to keep both filtration systems running at full capacity. The 4204490 water filter is also rated for 300 gallons so households with higher water consumption may need to order a replacement water filter at the 300 gallon mark even if the 12 month period has not been reached. Buying the combo pack at the annual mark rather than staggering individual replacements keeps both systems refreshed simultaneously and simplifies the maintenance schedule to a single order each year.
How to Install the Sub-Zero 4204490 Water Filter
- Locate the water filter housing inside the Sub-Zero refrigerator fresh food compartment
- Twist the old filter counterclockwise until it releases from the housing
- Pull the old 4204490 water filter straight out
- Align the new filter with the housing inlet and insert it firmly
- Twist clockwise until it locks securely into position
- Run 2 to 3 gallons of water through the dispenser before drinking
- Reset the filter indicator light per the Sub-Zero refrigerator user guide
How to Install the Sub-Zero 7042798 Air Cartridge
- Locate the air cartridge housing inside the Sub-Zero refrigerator, typically along the upper rear wall of the fresh food compartment
- Press the release tab to disengage the old 7042798 cartridge from the housing slot
- Pull the old cartridge straight out
- Remove the new 7042798 cartridge from its packaging
- Slide the new cartridge firmly into the housing until it snaps securely into place
- No flushing or water line reset is required after installation
- Note the installation date and schedule your next order at the 12 month mark
Shop Sub-Zero 4204490 & 7042798 Combo Pack
Ready to order the Sub-Zero 4204490 and 7042798 combo pack? Confirm both part numbers against your refrigerator model before completing your purchase to ensure the correct fit first time.
Shop Sub-Zero 4204490 & 7042798 Combo Pack from purefridgewater.
FAQs
Is the 4204490 and 7042798 combo the best value way to buy these filters?
Yes. Buying the combo pack in a single order rather than purchasing the 4204490 and 7042798 separately is the more convenient and cost-effective option for households replacing both on the same annual cycle.
Where can I buy the Sub-Zero 4204490 and 7042798 combo pack?
You can order the Sub-Zero 4204490 and 7042798 combo pack directly from the shop link on this page. Confirm both part numbers against your existing filter and cartridge labels before completing your purchase to avoid ordering the wrong combo pack.
Is the 4204490 and 7042798 combo the same as the 4204490 and 7007067 combo?
No. Both combo packs include the same 4204490 water filter but pair it with different air cartridges. The 7042798 is designed for newer generation Sub-Zero models while the 7007067 fits earlier generation models. Always confirm the air cartridge part number before ordering.
Can I order the 4204490 and 7042798 as individual replacements instead of the combo?
Yes. Both are available to buy separately. The combo pack is the best value option for households replacing both on the same annual schedule, eliminating separate orders and ensuring both filtration systems are refreshed at the same time.
How do I know this combo pack will fit my Sub-Zero refrigerator before I buy?
Check the part numbers on both the existing water filter and air cartridge currently installed in your unit. If the water filter shows 4204490 and the air cartridge shows 7042798, this is the correct combo pack to order. If the air cartridge shows a different number, check the compatible combo pack for that cartridge code before purchasing.
Why does my Sub-Zero refrigerator still have an odor after I replaced the 7042798 air cartridge?
A new cartridge reduces airborne odor compounds but does not remove odors embedded in refrigerator surfaces or food containers. Wipe down interior surfaces, check for spoiled food, and allow 24 to 48 hours for the new cartridge to reach full adsorption capacity.