Clearly Filtered Under-Sink System — product photo

Clearly Filtered Under-Sink System

by Clearly Filtered · Under-Sink Carbon
Best PFAS Removal — No Waste Water
8.6 / 10
8.6 Water Clean.
Primary Quality Score
💧 Water Cleanliness 8.6
⚗️ Optimal pH 7.8
🌿 Minerals 8.5
Overall Score 8.6
Our Verdict

NSF 42/53/401 certified for 270+ contaminants. PFAS removal to undetectable levels without RO — best-in-class activated carbon under-sink filtration.

Key Pros

  • NSF 42/53/401 certified for 270+ contaminants
  • PFAS removal to undetectable levels — exceptional for activated carbon
  • No RO waste water — virtually no water loss

Key Cons

  • Does not remove fluoride or nitrates (RO required for these)
  • Higher per-filter cost than basic carbon systems
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Full Review

Clearly Filtered's under-sink system uses a proprietary Affinity Filtration technology that achieves PFAS removal rates competitive with reverse osmosis — without the waste water, pressure requirement, or mineral removal. Independently certified by IAPMO to NSF/ANSI Standards 42, 53, and 401 for over 270 contaminants including PFAS/PFOA/PFOS, lead, chromium-6, pharmaceuticals, and microplastics.

Score Breakdown

8.6
Water Quality Score
Based on manufacturer specs, NSF/ANSI certifications, and independent lab data
💧 Water Cleanliness
8.6
⚗️ Optimal pH
7.8
🌿 Minerals
8.5
Additional Factors
Design
8.0
Maintenance
8.0
Value
7.5
8.6
Overall Score
Water quality weighted 85%, design/maintenance/value 15%

Pros & Cons

✓ What We Like

  • NSF 42/53/401 certified for 270+ contaminants
  • PFAS removal to undetectable levels — exceptional for activated carbon
  • No RO waste water — virtually no water loss
  • No pressure drop — maintains full flow rate
  • Retains healthy minerals unlike RO

✗ What Could Be Better

  • Does not remove fluoride or nitrates (RO required for these)
  • Higher per-filter cost than basic carbon systems
  • Does not reduce TDS

Specifications

typeUnder-Sink Carbon Filter
flow_rateFull residential flow (no pressure drop)
technologyAffinity Filtration (proprietary)
filter_life9-12 months
waste_waterNone (non-RO)
pfas_removalTo undetectable levels
certificationsIAPMO NSF/ANSI 42, 53, 401
contaminants_tested270+

Certifications

NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401
Starting from
From €349
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No commission received for this recommendation. Our review is entirely independent. See our affiliate disclosure for details.

Our Verdict
Clearly Filtered Under-Sink System — Worth It?
NSF 42/53/401 certified for 270+ contaminants. PFAS removal to undetectable levels without RO — best-in-class activated …
Check Price on Amazon
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