Sub-Zero 4204490 Refrigerator Water Filter

Overview

SUB-ZERO builds this replacement water filter cartridge for its refrigerators, running incoming water through a polypropylene body that reduces chlorine and other aesthetic impurities before the water reaches the dispenser or ice maker. The cartridge stands tall and narrow, so it slots into the filter housing the way the original did. Certification under NSF 42 covers the taste and odor side of filtration, not health contaminants.

Chlorine reduction and NSF 42 certification cover the everyday complaints of taste and smell in dispenser water, and the polypropylene body is the standard material for this job. What the page does not give you is a compatibility list, so the refrigerator model has to be checked against the housing before you commit.

Who it's for

Homes with a Sub-Zero refrigerator that already uses this cartridge shape get a direct replacement for taste and odor control. Without a model list on the page, a buyer who has not checked the housing is taking a chance, and anyone expecting removal of health contaminants should look at what NSF 42 actually covers.

Pros and cons

Performance notes

Filtration here works by passing water through a polypropylene cartridge that captures chlorine and the compounds behind taste and odor. How long the cartridge continues doing that depends on the volume of water drawn and the quality of the local supply, and the warranty explicitly excludes defects caused by poor water quality. The cartridge only performs as intended when it is seated correctly in the housing.

Specifications