Compare Under Sink Water Filter
Clearly Filtered 3-Stage Under-the-Sink Water Filtration System scores higher on safety - here's why.
R3 scored the Hydroviv Under Sink Water Filter 3.5/10 and the Clearly Filtered 3-Stage Under-the-Sink Water Filtration System 10.0/10 on the same under sink water filter scoring system, weighing safety, efficacy, and usability. The Clearly Filtered 3-Stage Under-the-Sink Water Filtration System comes out ahead, led by its safety score (10.0/10 vs 4.0/10).
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 Hydroviv Under Sink Water Filter vs Clearly Filtered 3-Stage Under-the-Sink Water Filtration System.
Unlock the full Hydroviv Under Sink Water Filter vs Clearly Filtered 3-Stage Under-the-Sink Water Filtration System 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 — this is the only under-sink filter that uses your existing faucet without modification.
You're in a city with documented contamination issues and you want a filter targeted to your utility's specific water profile.
You want zero water waste — no drain line, no gallons poured away for every gallon filtered.
Annual cost is a priority — at $267/yr, Hydroviv is among the more affordable certified options for under-sink filtration.
You want the most rigorously documented PFAS and contaminant protection available in an under-sink filter and are willing to invest in it
You live in a rental or don't want to drill a new faucet hole — the inline installation works with your existing setup
You want zero water waste and don't need a reverse osmosis system to feel confident in your water quality
The main thing to know
Hydroviv built something genuinely clever: a filter customized to your specific city's water problems using real utility and EPA data. For people in cities with known lead or PFAS issues, that targeted approach is appealing. The score is low not because Hydroviv is a bad filter, but because R3's framework is built on what can be independently verified — and right now, neither the PFAS protection nor the performance results can be confirmed by an outside party. If you're willing to take Hydroviv's word for it, you might be fine. If you need proof you can look up yourself, this filter can't provide it.
At $495 upfront, this is one of the more expensive under-sink filters on the market — but the filter replacements are annual at the 2,000-gallon life, and no competing filter matches the combination of NSF 473 PFAS certification, 232-contaminant independent verification, and no-drill installation.
Skip this if you...
You need PFAS protection you can verify independently at NSF.org — Hydroviv holds no NSF P473 PFAS certification.
You want published lab test results showing exactly which contaminants were removed and by how much — Hydroviv doesn't publish structured test reports.
Your top concern is PFAS (PFOA, PFOS, GenX, PFBS): the Aquasana AQ-5200 at $249 carries NSF P473 PFAS certification and is verifiable.
You're on a tight budget and need a more affordable entry point — consider the Clearly Filtered pitcher while saving up
You need a guaranteed published flow rate because multiple family members will be drawing filtered water simultaneously
You prefer reverse osmosis technology specifically and don't mind the installation complexity it requires
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 Hydroviv and Clearly Filtered 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 Clearly Filtered Clearly Filtered 3-Stage Under-the-Sink Water Filtration System - it scored 10.0/10 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.
Aquasana
Aquasana OptimH2O Reverse Osmosis + Claryum Under Counter Water Filter System
9.0
Clearly Filtered
Clearly Filtered 3-Stage Under-the-Sink Water Filtration System
10.0
Aquasana
Aquasana Claryum 2-Stage Under Counter Water Filter System AQ-5200
9.3
APEC Water Systems
APEC Water Systems ROES-50 Reverse Osmosis Drinking Water Filter System
8.9
