Aqua Fresh · Refrigerator Filters
Aqua Fresh Replacement Refrigerator Water Filter WF425
Lower-concern replacement filter; no PFAS red flags, but brand offers no transparency.
Aqua Fresh WF425 is a standard activated-carbon refrigerator filter with polypropylene casing, conventional materials not typically associated with intentional PFAS use. The brand makes no public claims about PFAS avoidance or testing.
Shop Aqua Fresh on Amazon →Material
activated carbon, polypropylene housing
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
The WF425 uses activated carbon as its primary filtration medium, a well-established material that traps chlorine, odors, and some organic compounds through adsorption. The housing is polypropylene (PP), a thermoplastic polymer chosen for food contact because it resists degradation at typical cold refrigerator temperatures and does not leach BPA or phthalates. No enamel coatings, glazes, or metal liners are present that would introduce lead or cadmium risk.
The brand's record and disclosure
Aqua Fresh maintains no publicly available third-party certifications (NSF, WQA) on record for this model, which limits independent verification of filtration claims and material safety. The brand has not published PFAS testing or material sourcing transparency statements. No major recalls or safety controversies are documented for this product line, but the lack of disclosure makes it impossible to verify manufacturing controls or contaminant screening.
How it compares in its category
Refrigerator filters occupy a lower-stakes safety position than pitcher filters or tap-mounted units because they sit inside sealed appliances and experience stable cold conditions. The WF425 is a generic compatible replacement sold under multiple brand names; it performs comparably to OEM filters and other activated-carbon cartridges in its price tier. Certified alternatives (3M Aqua-Pure, Whirlpool) offer NSF certification at higher cost but similar core material safety profiles.
If you buy it
Replace the filter every 6 months or 300 gallons, whichever comes first, to prevent bacterial biofilm growth on the saturated carbon bed. Do not apply heat to the filter or store it above 90°F before installation. Keep the filter in its original packaging until use to avoid dust and debris contamination. Ensure the filter seats fully in the refrigerator housing to avoid bypass.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Bacterial biofilm growth (unmaintained filter)
Activated carbon filters can harbor bacteria if left in service beyond their rated life or if the refrigerator water system is not regularly flushed. This is a maintenance issue rather than a material hazard, but it applies to all carbon filters in this category.
Polypropylene housing leaching under stress
PP does not leach BPA, phthalates, or identified endocrine disruptors at refrigeration temperatures. No documented cases of PP degradation or contaminant release from WF425-type housings exist in public records.
Activated carbon dust or particles in water
If the filter cartridge is damaged, cracked, or improperly installed, carbon particles may bypass into the water supply. This is a defect or installation failure risk, not an inherent material hazard.
Contaminant pass-through due to certification gaps
Without NSF or WQA certification, the actual filtration performance for specific contaminants (lead, cysts, chloramines) cannot be independently verified. The brand makes no public claims about performance standards.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 68% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Refrigerator Filters
Kenmore
9690 Refrigerator Water Filter 1-Pack, Nsf/wqa/iapmo Certified, Reduces 99% Chlorine & Odor, BPA-Free, Replacement for 46-9690 469690 Lt700p
activated carbon filter cartridge
Lower-concern water filter; carbon-based design unlikely to contain PFAS, but Kenmore makes no explicit PFAS disclosure.
✓Verified PFAS-free by a third party
Kenmore
Pureline Filter Compatible with Whirlpool Everydrop Filter 1
Activated carbon and fiberglass filter media
Lower concern for PFAS; standard cartridge filter with no known PFAS-bearing materials, but brand offers no transparency.
✓Bare metal or glass, no coating at all
Clearly Filtered
Water Pitcher Replacement Filter 3-Pack
Activated carbon and ion-exchange resin filter media
Lower-concern option; activated carbon filters are standard PFAS-reduction media, but verify pitcher durability and actual tested removal rates independently.
✓Brand claims PFAS-free (unverified)
More refrigerator filters grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.