filter
The strongest cert chain (42 for aesthetic chlorine/taste, 58 for RO performance, 372 for lead-free materials) of any under-sink RO in our sweep. Tankless design means no storage tank under the cabinet, faster recovery, lower waste-water ratio than older RO units.
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Quick take
Why we picked it
The strongest cert chain (42 for aesthetic chlorine/taste, 58 for RO performance, 372 for lead-free materials) of any under-sink RO in our sweep. Tankless design means no storage tank under the cabinet, faster recovery, lower waste-water ratio than older RO units.
Under-sink tankless RO with the strongest NSF cert chain in our entire under-sink lineup: NSF/ANSI 42, 58, and 372. Hidden plumbing, no counter footprint.
Lab verification
LAB VERIFIEDThis product carries third-party lab data we've reviewed ourselves. Below are the specific certifications we relied on.
Where to buy
Alternatives
Other picks in the same category we'd also consider, ranked the same way.
Editor's pickGravity-fed filter that strips lead, PFAS, fluoride, and microplastics. No plumbing required.
Premium pickReverse osmosis on the counter. Four-stage, certified for 84 contaminants including the full PFAS panel.
Best entry-levelThe starter swap. Tested for 30+ contaminants including microplastics and lead, with published lab data.
Recommended based on the criteria for the water chapter, written down before we shopped. Read the methodology →