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Sub-Zero

Shop Sub-Zero refrigerator water filters and air purification cartridges designed for select Sub-Zero refrigeration systems.

Our collection includes replacement filtration options for compatible Classic, Designer, and PRO Series refrigeration, along with selected legacy models. Each product page provides clear part numbers, compatibility information, replacement guidance, and product details to help you choose the correct filter.

Find the Right Sub-Zero Filter

Sub-Zero refrigerators use different filtration systems depending on the model, series, and production year.

Before ordering, check:

The part number printed on your current filter
Your refrigerator model number
Your appliance serial number when available
The filter shape and connection type
The compatibility information on the product page

Sub-Zero specifically recommends using the existing filter part number or appliance serial number to determine the correct replacement.

Popular Sub-Zero Water Filter References

Depending on the refrigerator model, Sub-Zero water filter references may include:

4204490
9030868
7023812
7045454
7012333
Other model-specific Sub-Zero filter references

The 4204490 is a twist-in style filter used with select Classic, Designer, and PRO Series refrigeration, while other Sub-Zero models may use different filter designs.

Fresh-Tasting Water & Ice

Sub-Zero refrigerator water filters are designed to help improve the quality and taste of water supplied to compatible refrigerator dispensers and ice-making systems.

Depending on the filter model, filtration may help reduce:

Chlorine taste and odor
Unwanted taste
Unwanted odor
Selected contaminants
Particulates and other substances covered by the filter's performance specifications

Filtration performance varies by filter, so check the individual product page for exact specifications and certification information.

Sub-Zero 4204490 Water Filter

The 4204490 is one of the commonly used Sub-Zero refrigerator water filters.

It is designed for select:

Classic Series refrigerators
Designer Series refrigerators
648PRO
PRO3650
PRO4850

Sub-Zero states that this filter is designed to reduce contaminants including chlorine while filtering unwanted taste and odor, and the cartridge can last up to approximately one year depending on use and conditions.

Sub-Zero Air Purification Cartridges

Selected Sub-Zero refrigerators also feature an air purification system designed to help manage odors and gases produced by fresh foods.

Air purification systems are available on selected Classic, Designer, and Professional refrigeration models.

Common air purification cartridge references may include:

7042798
7007067

These cartridges are separate from refrigerator water filters and serve a different purpose inside the appliance.

Water Filters vs. Air Purification Cartridges

Water Filters

Designed to filter water supplied to compatible refrigerator dispensers and ice-making systems.

Air Purification Cartridges

Designed for compatible refrigerator air purification systems to help maintain the refrigerator's internal environment.

Always choose the correct product type for your appliance.

Branded & Compatible Replacement Filters

Products in this collection are clearly identified according to the item being sold.

Some products may be Sub-Zero-branded filters, while others may be compatible replacement filters designed for select Sub-Zero filtration systems.

Compatible replacement products are clearly identified as compatible and are not presented as Sub-Zero-manufactured products unless they are actually Sub-Zero branded.

Check Compatibility Before Ordering

Sub-Zero models can use different filters even within the same refrigerator series.

Before purchasing, compare:

Existing filter part number
Refrigerator model
Appliance serial number
Filter connection style
Product compatibility details

For example, some Classic Series refrigerators use a one-prong twist-in filter while others use a different two-prong filter design.

When Should You Replace a Sub-Zero Filter?

Replacement timing depends on the specific filter model.

The Sub-Zero 4204490 water filter is designed to last up to approximately one year, while compatible appliances may also provide a filter-life indicator to let you know when replacement is needed.

Sub-Zero air purification cartridges are also generally designed for replacement approximately once per year in compatible systems.

You may need to replace a filter when:

The appliance filter indicator appears
Water flow becomes slower
Water taste or odor changes
The recommended replacement period has passed
The filter reaches its rated service life

Always follow the replacement guidance for the specific filter model.

Why Shop Sub-Zero Filters at USA Filter Shop?

Clear Part Number Information

Filter references are clearly listed to help you identify the correct replacement.

Compatibility Guidance

Product pages include appliance and filter compatibility information to help reduce incorrect orders.

Water & Air Filtration Options

Shop replacement water filters and selected air purification cartridges for compatible Sub-Zero systems.

Branded & Compatible Options

Products are clearly identified so you can see whether you are purchasing a branded filter or a compatible replacement.

Reliable Shipping

Standard Shipping: 5–7 days

Frequently Asked Questions

How do I know which Sub-Zero refrigerator filter I need?

Check the part number printed on your current filter and compare it with the product page. Your Sub-Zero model and serial number can also help identify the correct filter.

Do all Sub-Zero refrigerators use the same water filter?

No. Different Sub-Zero models and series can use different water filter systems.

What is Sub-Zero filter 4204490?

4204490 is a twist-in refrigerator water filter used with select Sub-Zero Classic, Designer, and PRO Series refrigeration.

Are 4204490 and 9030868 interchangeable?

Sub-Zero lists 4204490 and 9030868 as interchangeable twist-in filter references for applicable models.

How often should I replace a Sub-Zero water filter?

Replacement timing depends on the filter model. The 4204490 cartridge is designed to last up to approximately one year.

Does Sub-Zero use air filters?

Selected Sub-Zero models include an air purification system that uses a replaceable cartridge.

Is a Sub-Zero air purification cartridge the same as a water filter?

No. A water filter treats water, while an air purification cartridge is used inside compatible refrigerator air purification systems.

What is a compatible Sub-Zero replacement filter?

A compatible filter is made by a third-party manufacturer and designed for selected Sub-Zero filtration systems. It is not presented as a Sub-Zero-manufactured product unless it is actually Sub-Zero branded.

What if I am unsure which filter fits?

Check your existing filter part number, refrigerator model, and appliance serial number before ordering, or contact USA Filter Shop for compatibility assistance.

Returns & Refunds

We accept eligible returns in accordance with our return policy. Approved refunds are issued to the original payment method, and return eligibility depends on the item condition and applicable return terms.

For complete details, please read our Return & Refund Policy.

Shipping

We offer reliable standard shipping on USA Filter Shop orders.