Which Sub-Zero Filter Do I Need?
Sub-Zero uses different filters for different refrigerator lines, and the part numbers have changed over the years — so it's easy to order the wrong one. Use this guide to find the exact genuine OEM filter for your unit in about 30 seconds. Every filter below is in stock and ships fast with free shipping and free returns.
Quick Answer: Filter by Refrigerator Type
| Your Sub-Zero | Water Filter | Air Filter |
|---|---|---|
| Classic / Built-In series (models starting with BI-) | 4204490 | 7042798 |
| Designer / Integrated series (models starting with IC-, IT-, ID-, IW-) | 4204490 | 7042798 |
| PRO 48 (Model # 648PRO) | 4204490 | — |
| Undercounter ice makers (UC-15I, UC-15IO) | 7042803 (formerly 7012333) | — |
| Older units (serial number before #4116297) | 7023812 | — |
Replacing both filters? Save with the 4204490 + 7042798 combo pack.
Old vs. New Part Numbers
Sub-Zero has renumbered several filters. If you've been ordering the old number, here's the translation — the filters are identical, only the packaging and number changed:
| Old Part Number | Current Part Number | What It Is |
|---|---|---|
| 7007067 | 7042798 | Air purification cartridge |
| 7012333 | 7042803 | UC-15 ice maker water filter |
Find Your Filter by Model Number
Your model number is on a label inside the refrigerator compartment, usually on the side wall or ceiling.
Classic (Built-In) Series — BI Models
Water filter: 4204490 | Air filter: 7042798
BI-30UG, BI-36F, BI-36R, BI-36RG, BI-36S, BI-36U, BI-36UFD, BI-36UFDID, BI-36UID, BI-42S, BI-42SD, BI-42SID, BI-42UFD, BI-42UFDID, BI-48S, BI-48SD, BI-48SID
Designer Column Series — IC Models
Water filter: 4204490 | Air filter: 7042798 (refrigerator columns)
IC-18FI, IC-24CI, IC-24FI, IC-24R, IC-30FI, IC-30R, IC-30RID, IC-36FI, IC-36R, IC-36RID
Designer Over-and-Under & Drawer Series — IT, ID & IW Models
Water filter: 4204490 | Air filter: 7042798
IT-30CI, IT-30CIID, IT-30FI, IT-30R, IT-30RID, IT-36CI, IT-36CIID, IT-36R, IT-36RID, ID-30RP, ID-36RP, IW-30CI
PRO 48
Water filter: 4204490 — Model # 648PRO
Undercounter Ice Makers — UC Models
Water filter: 7042803 (formerly 7012333) — UC-15I, UC-15IO. This filter fits Sub-Zero ice makers only — it will not fit full-size refrigerators.
Older Sub-Zero Units
Water filter: 7023812 — for units with a serial number before #4116297. Check the serial number on the label inside the refrigerator compartment.
How Often Should I Replace My Filters?
- Water filters (4204490, 7042803): every 6 months
- Water filter (7023812): every 12 months
- Air purification cartridge (7042798): once a year
A fresh water filter keeps water and ice tasting clean and protects your refrigerator's internal components. The air cartridge scrubs bacteria, mold spores, and ethylene gas every 20 minutes, helping produce last longer.
Frequently Asked Questions
My model isn't listed — what do I do?
Send us your model and serial number through our contact information on the About Us page and we'll match you with the correct filter, usually within a few hours.
Are your filters genuine Sub-Zero parts?
Yes — every filter we sell is a factory-certified OEM part from Sub-Zero in Madison, Wisconsin. We never sell third-party or aftermarket imitations.
How do I install my new filter?
Most Sub-Zero filters install in under two minutes with no tools. Step-by-step guides: 4204490 water filter, 7042798 air cartridge, 7042803 / 7012333 ice maker filter.
Where is my serial number?
On the same label as your model number, inside the refrigerator compartment — typically on the side wall or ceiling of the fresh food section.
