Compare Under Sink Water Filter
Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 scores higher on safety - here's why.
R3 scored the Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 9.3/10 and the Kinetico K5 Drinking Water Station 8.9/10 on the same under sink water filter scoring system, weighing safety, efficacy, and usability. The Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 comes out ahead.
The most important dimensions, side by side.
See which one actually scores higher — and why
Free account unlocks full safety scores, spec-by-spec breakdown, and the R3 verdict on Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 vs Kinetico K5 Drinking Water Station.
Unlock the full Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 vs Kinetico K5 Drinking Water Station breakdown
Free account unlocks all safety scores, complete spec comparison, scoring rationale, and the R3 verdict on which one to buy.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
You rent or live in a condo and can't drill through your counter — the AQ-5200 uses your existing soap dispenser hole, no new hole required.
PFAS is your top concern and you want a certification you can independently verify — NSF P473 via WQA is publicly searchable.
You want the environmental benefit of no wastewater — unlike RO systems, this filter doesn't pour gallons down the drain.
You want a PFAS-certified system under $250 — the AQ-5200 is among the most affordable systems with this certification stack.
You want NSF-certified PFAS removal — specifically PFOS and PFOA — from a permanently installed under-sink system with professional installation and service.
A power outage resilient filter matters to your household, since the K5 runs on water pressure alone with no electrical requirement.
You prefer a service relationship over DIY ownership — Kinetico dealers handle installation, maintenance, and filter replacements for you.
Your household water has documented lead, arsenic, fluoride, or PFAS contamination and you want an RO system backed by independent third-party certification.
The main thing to know
The AQ-5200 earns its Exceptional score by doing something rare: full PFAS certification (verifiable at wqa.org), 100% water recovery (no wastewater like RO systems), and no-drill installation that renters can realistically do — all for $249. The honest tradeoff is filter life. At 500 gallons, you're changing filters every 7–8 months and spending about $108 per year. If you can live with that cadence, this is the best-value certified PFAS-removal under-sink filter available for renters and condo owners. The only system that beats it in this category is Clearly Filtered, which offers a 2,000-gallon filter life but costs more upfront.
The K5 earns its Great rating almost entirely on safety — the WQA Gold Seal NSF 58 certification with explicit PFOS/PFOA coverage is the real story here. What you can't know before buying is what it costs, how long the filters last, or how fast the water flows. This is a call-a-dealer product, and every number that matters requires a consultation. If you're comfortable with that and want professional installation with ongoing service, the safety credentials justify the process.
Skip this if you...
You don't want to change filters every 7–8 months — Clearly Filtered's 2,000-gallon filter system lasts nearly 3x longer per cartridge.
You want the lowest annual filter cost — systems with longer filter life cost less per year to maintain.
You have unused counter space and are open to a countertop RO system — AquaTru's RO systems offer higher overall contaminant reduction at comparable cost.
You need transparent upfront pricing — this is a dealer-quote product with no published price, filter life, or annual maintenance cost.
You want to compare specs like flow rate or water recovery against other systems before deciding — Kinetico doesn't publish those numbers publicly.
You're comfortable with DIY installation and don't need a dealer service relationship — you'll pay more for the K5's service model than buying a comparable certified system direct.
Neither of these quite what you're looking for?
I've reviewed all Under Sink Water Filter options at every price pointEvery Under Sink Water Filter in our database is scored using R3's deterministic scoring system - the same inputs always produce the same score. For this comparison, we evaluated Aquasana and Kinetico across 3 independent criteria: Safety (68%), Efficacy (31%), Usability (1%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
I'd start with Aquasana Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200 - it scored 9.3/10 overall in our scoring system. Safety is our top-weighted scoring pillar, followed by efficacy, and usability. Check which pillar matters most to your family and compare those specific scores.
R3 uses a deterministic scoring system - the same inputs always produce the same score. We evaluate each Under Sink Water Filter across Safety, Efficacy, Usability using independently verified data. No sponsored rankings. No paid placements. Every score is fully reproducible.
Not necessarily. The overall score reflects how we weight those three pillars, but your priorities may differ. If you care most about safety, compare the safety scores directly. If budget drives your decision, the prices tell a clearer story. The "right" pick is the one that matches what matters most to your family.
Not the right match? Explore these alternatives in the same category.
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Hydroviv
Hydroviv Under Sink Water Filter
3.5
Clearly Filtered
Clearly Filtered 3-Stage Under-the-Sink Water Filtration System
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