Alkaline, remineralized RO water
RKIN Zero Installation Purifier - AlcaPure
Countertop reverse osmosis, batch pitchers by RKIN · Certified claims
$369.95
Sale price at rkin.com (compare-at $489.95) · checked October 23, 2026
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Our verdict
The connoisseur's countertop RO: certified where it counts, and the only one here that puts minerals back on purpose. Choose it if taste is your top priority and a batch rhythm fits your kitchen.
Specifications & certification
| Type | Countertop reverse osmosis, batch pitchers |
| How it works | A two-pitcher batch design: fill the bottom container, press the button, and purified water collects in the removable top container (about 15 minutes per half-gallon). Sediment, carbon block, 75 GPD RO membrane, then the AlcaPure alkaline filter. |
| Certification status | Certified by IAPMO R&T to NSF/ANSI 58 for the reduction of TDS, fluoride, lead, hexavalent chromium and trivalent chromium (RKIN's US product page, verbatim). Note the certified list does not include PFAS on the US page. |
| Filter life | Cartridge kit (stages 1, 2, 4) every 12 months - RO membrane every 2-4 years |
| Replacement filters | AlcaPure cartridge kit $79.95 - RO membrane $74.95 |
| Running cost | About $105/yr including membrane amortization |
| Flow / pace | Batch - 0.5 gal per cycle, about 15 minutes |
| Size | 9.5 in W x 14.5 in D x 16.25 in H |
| Power & plumbing | Plug-in (24W). No plumbing, no drain - reject water stays in the bottom pitcher for plants or disposal |
| Warranty | 1-year warranty and 1-year satisfaction guarantee |
What it claims to reduce
These are RKIN's own published figures, graded by the certification status above - we do not run a lab, and we do not upgrade a brand's wording.
- Lead 99.31-99.94% in IAPMO lab data
- Fluoride 81.25-95.12% in lab data
- TDS 77.84-98.23% in lab data
- AlcaPure post-filter returns calcium and magnesium (pH 7-8)
Strengths
- Real NSF/ANSI 58 certification for named contaminants
- Remineralizes - no flat-tasting RO water
- Nothing to plumb, nothing to drain
Trade-offs
- Batch pace is slow for filling big pots
- Fluoride lab results vary more than rivals' (81-95%)
- Two containers to handle and clean
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