Sub Zero 7023812 Refrigerator Water Filter

Not every Sub-Zero refrigerator uses the same filter. Older units built before serial number 4116297 rely on a carbon block design rather than the microbiological filter found in newer models, and the Sub Zero 7023812 Refrigerator Water Filter is the part built specifically for them.

Check Your Serial Number First

This filter is only correct for refrigerators with a serial number below 4116297. That number is on the sticker inside the fridge, usually near the door hinge. Ordering the right refrigerator water filter replacement starts with confirming that number, since installing the wrong cartridge simply won't fit or seal properly.

Made for Harder Water

Some homes deal with water conditions that push past what a standard filter can handle. Where a typical sub zero water filter cartridge might clog or slow down under high mineral or sediment content, this carbon block design was engineered to keep working through those tougher conditions without losing performance early.

A Full Year Between Changes

This cartridge is rated for up to 12 months of use, longer than the 6 month cycle on newer Sub-Zero filter models. That means less frequent ordering and one less thing to track on your maintenance calendar.

Confirmed by Independent Testing

The filter carries NSF/ANSI Standard 42 certification, which verifies it reduces chlorine taste, odor, and nominal sediment down to tested limits rather than relying on manufacturer claims alone.

Part of a Complete Filter Lineup

Whether you're restocking sub zero water filter replacement parts for a single fridge or managing filters across several older units, the 7023812 fits alongside related part numbers like 7023811, 7023816, 7009931, and 7005017, all built for the same generation of Sub-Zero refrigerators.

Specifications