Sharp · Refrigerator Filters
SpiroPure SP-GSGS Refrigerator Water Filter Replacement
Lower concern; typical carbon filter unlikely to contain PFAS.
Refrigerator filters use activated carbon and mechanical media, materials not typically treated with PFAS. Sharp provides no public PFAS disclosure, but standard filter construction poses minimal inherent risk.
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Activated carbon and mechanical filtration media
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The SpiroPure SP-GSGS uses activated carbon as its primary filtration medium, a well-established material that adsorbs chlorine, odors, and some organic compounds. Mechanical filtration layers trap sediment and particulates. Activated carbon itself has no known toxicity when used in cold-water (non-heated) applications like refrigerator filters, and the material does not leach harmful substances into drinking water under normal conditions.
The brand's record and disclosure
Sharp does not publish detailed safety certifications or third-party test results specific to the SP-GSGS filter on widely accessible channels. No major recalls or contamination incidents are documented for this model. The brand's silence on testing and compliance details is typical for aftermarket filter manufacturers but limits independent verification of performance claims.
How it compares in its category
Refrigerator filters are a low-risk product category because water passes through at cold temperatures with minimal contact time. The SP-GSGS sits in the standard activated carbon segment; it is not marketed as NSF-certified or independently tested, which places it slightly below premium alternatives (e.g., filters with NSF/ANSI 42 certification) but within normal market practice for replacement filters.
If you buy it
Replace the filter every 6 months or after 300 gallons, whichever comes first, to prevent bacterial colonization in stagnant carbon and maintain filtration efficiency. Do not expose the filter to temperatures above room temperature before installation. Rinse the cartridge under cold water for 15 seconds before first use to reduce carbon dust. Store in a cool, dry place until installation to prevent moisture and microbial growth.
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 growth in unmaintained filter housing
If filters are not replaced on schedule, stagnant water in activated carbon becomes a growth medium for mold and bacteria; this is a usage and maintenance issue, not a product defect.
Carbon dust ingestion from improper installation
Activated carbon particles may be released if the filter is not pre-rinsed or is forcefully installed; rinsing before use eliminates this risk.
Housing materials and leachables
Sharp does not disclose housing material composition in public documentation; no recalls or contamination reports exist for the SP-GSGS, suggesting typical food-grade plastic or similar.
Failure to meet advertised filtration claims
Without independent NSF certification, actual removal rates for chlorine, taste, and odor cannot be verified against claims; performance depends on water chemistry and flow rate.
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.