Under-sink reverse osmosis · checked 16 Oct 2026
Waterdrop Instant Hot Water Dispenser, Reverse Osmosis System, K6
Model WD-K6-W · replacement filter WD-KJF
Lead:Brand claim onlyPFAS:Brand says certified
Each claim, checked
What the brand says, what a certification listing shows for this model, and where each fact comes from. We read listings; we do not test products.
- Certified (listing checked)The certifier’s public listing shows this claim for this model.
- Brand says certifiedThe brand says certified; IAPMO’s listing does not show it. NSF can be checked by hand.
- Brand claim onlyThe brand claims it without citing a certification.
| Contaminant | Brand claim | Standard | Certifier | Confirmed? | Source, date checked |
|---|---|---|---|---|---|
| Lead | “Lead*, Taste & Odor*, Large Particles*, Heavy Metals*, Rust*, Sand*, Salt*, Nematodes*, Sediments*, and More Impurities* *Tested by a third-party laboratory.” brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| PFOA | “NSF/ANSI 372 Certified | Reduced substances | Fluoride, PFOA & PFOS, TDS, Chlomium, Chlorine” brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| PFOS | Same statement as for PFOA. brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Total dissolved solids (TDS) | Same statement as for PFOA. brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Fluoride | Same statement as for PFOA. brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Scale | “5-in-1 Deep Filtration: Reduces TDS, fluoride, heavy metals; prevents limescale.” brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| Chlorine | Same statement as for PFOA. brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Taste and odor | “Reduces Fluoride, Sediment, Rust, TDS, Chromium, PFOA, PFOS, and adsorbs Color, Taste & Odor, Chlorine, Salts and Large Particles” brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| Other | Same statement as for PFOA. brand source | NSF/ANSI 372 | IAPMO (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Particulates | Same statement as for Lead. brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
Filter changes, by the brand’s numbers
How often Waterdrop says to replace each part. Real filter life depends on how much water you use and what is in it.
| Part | Brand says replace every | Changes a year | Source, date checked |
|---|---|---|---|
| WD-KJF composite RO filter | 12 months or 1,100 gallons“KJF Filter Provides up to 12 months or 1,100 gallons of clean water.” | 1 | brand sourcechecked 16 Oct 2026 |
Certification listings found
IAPMO · NSF/ANSI/CAN 372 · file WC-13977
Qingdao Ecopure Filter Co. Ltd lists WD-K6
Materials only (no reduction claim)
Open the listing · checked 16 Oct 2026
Check it yourself
NSF’s and WQA’s terms don’t allow automated lookups, so these links open their public listings for this model:
- NSF listing search: WD-K6
- NSF listing search: Waterdrop
- WQA listing search: WD-K6
- WQA listing search: Waterdrop
- IAPMO R&T listing directory
What the brand says about certification
- “NSF/ANSI 372 Certified” source checked 16 Oct 2026
- “System Certified by IAPMO R&T to NSF/ANSI 372 for low lead.” source checked 16 Oct 2026
Performance data sheet (names IAPMO R&T)