Miele · Refrigerator Filters
Miele Refrigerator Water Filter 7134220
Lower-concern choice; carbon filters are not typical PFAS delivery vectors, but Miele does not disclose materials or testing.
Miele's 7134220 is a replacement activated-carbon water filter designed to reduce chlorine and odor. Carbon-based filters are not inherently PFAS-bearing and carry lower risk than perfluorinated membranes.
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Activated carbon filter cartridge
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 Miele 7134220 is an activated carbon cartridge filter designed to reduce chlorine, odor, and some organic compounds from refrigerator water dispensers. Activated carbon itself is a well-established, chemically inert filtration medium with no known leaching risk under cold water conditions typical of refrigerator use. The cartridge housing and seals are not publicly detailed by Miele, which is common industry practice but limits transparency on potential plastic leachates.
The brand's record and disclosure
Miele does not publicly disclose detailed material composition or third-party safety testing results for this filter cartridge, which is standard for the appliance-filter category but falls short of best transparency practices. The brand has no documented safety recalls or contamination incidents associated with this specific model. Miele maintains a reputation for build quality and durability in appliances, though its communication on filter-specific chemical safety is minimal.
How it compares in its category
Refrigerator filters are generally lower-risk than pitcher filters or under-sink systems because they operate at cold temperatures and do not concentrate water over time. This Miele cartridge is comparable to OEM and aftermarket carbon filters in both design and transparency level. Most competitors in this segment also withhold detailed material composition and rely on activated carbon as the primary active ingredient without public hazard disclosure.
If you buy it
Replace the cartridge every 6 months or per manufacturer guidance (typically 300-400 gallons) to prevent bacterial biofilm growth inside a saturated filter. Do not store the filter in direct sunlight or at temperatures above 40 degrees Celsius before installation. Ensure seals are properly seated during installation to prevent bypass of unfiltered water. If water taste or flow degrades unexpectedly, replace immediately rather than attempting to extend the cartridge life.
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/microbial growth in saturated filter
Like all carbon filters, this cartridge can develop biofilm if not replaced on schedule or if water sits stagnant in the reservoir; risk is low with proper maintenance but present if intervals exceed 6-8 months.
Cartridge housing and seal leachates (BPA or phthalates in plastics)
Miele does not disclose cartridge housing material or manufacturing details; cold water exposure minimizes leaching risk, but without composition data, potential cannot be ruled out.
Filter bypass or improper seal installation
Incorrect cartridge seating can allow unfiltered water to bypass the carbon medium entirely; this is a mechanical/user error hazard rather than a chemical one, but affects water safety.
Activated carbon dust or fines migration
New or damaged cartridges may release fine black carbon particles into water; this is cosmetic and non-toxic but indicates filter integrity loss and warrants replacement.
Heavy metals or organic contaminant breakthrough after saturation
No published testing data on when this filter loses efficacy for specific contaminants; activated carbon saturation curves are not disclosed, so actual performance lifespan beyond odor reduction is uncertain.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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.