Kyowon Property Co WS674
A NSF-certified under-sink filter that is certified to reduce 1 contaminant.
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You want strong contaminant reduction at the kitchen tap without a countertop unit, and are comfortable with a simple under-cabinet install.
Certified for taste, odor, and chlorine (an aesthetic filter).
This is an aesthetic-standard filter (NSF 42) — it improves taste and reduces chlorine, but is not certified for health contaminants like lead or PFAS.
What is under-sink filter? A carbon-based cartridge (or set of stages) plumbed under your kitchen sink that filters the cold drinking-water line. Compare all filter types →
What it costs to own
| Upfront price | Check on Amazon → |
| Replacement filter (CarbonMineralC3 Nano Mineral N3 Plus Mineral P1) | Find replacement → |
| Estimated yearly cost (filters, ~1.5×/yr) | — |
| True cost per gallon | — |
Cost per gallon and yearly cost are our estimates from the rated capacity and current prices. The filter only works if you replace it on schedule.
What it's certified to remove
Certification is per-contaminant: the Kyowon Property Co WS674 is credited only for the contaminants listed here, verified by NSF. It does not imply removal of anything not listed.
✓ Verify this certification on the official NSF listing →
Full specifications
| Certified by | NSF |
| NSF/ANSI standards | 42 — reduces taste, odor, and chlorine (aesthetic standard) · 401 — reduces emerging contaminants such as pharmaceuticals and pesticides |
| Filter type | Under-sink filter |
| Rated capacity | 476 gallons |
| Flow rate | 0.2 gpm |
| Replacement element | CarbonMineralC3 Nano Mineral N3 Plus Mineral P1 |
| Installation | Mounts under the sink; connects to the cold line. Basic DIY. |
Frequently asked
Is the Kyowon Property Co WS674 NSF certified?
Yes — the Kyowon Property Co WS674 is listed in the NSF certified-product database under NSF/ANSI standards 42, 401. That means an independent body verified its claims (not just "tested to" a standard).
What does the Kyowon Property Co WS674 remove?
It is certified to reduce 1 contaminants: Chlorine / chloramine.
How often do you replace the under-sink filter?
A under-sink filter like this is typically replaced about 2 time a year (replacement element CarbonMineralC3 Nano Mineral N3 Plus Mineral P1). Replace on schedule — a spent cartridge stops reducing contaminants.
Compare similar under-sink filters
Source: NSF public certification listing. Specs and certified claims are from the official listing; cost figures are our estimates. Some links are affiliate links — see our disclosure.