Waterdrop G3P800 Tankless Reverse-Osmosis System
Certified for PFOA/PFOS (NSF/ANSI 53) and for lead and fluoride (NSF/ANSI 58) at one kitchen tap. Not certified for arsenic or nitrate.
- Under-Sink Filter
- Reverse Osmosis
Certified for 9 targets
- Eligible: current record covers it
- Not established, with the reason
✓PFOAEligibleNSF/ANSI 53
CertificationIAPMO certificate 19838 current 2026-10-07 · NSF/ANSI 53
IAPMO certificate 19838 (NSF/ANSI 53, Waterdrop G3P600/G3P800 PFOA/PFOS) ↗CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓PFOSEligibleNSF/ANSI 53
CertificationIAPMO certificate 19838 current 2026-10-07 · NSF/ANSI 53
IAPMO certificate 19838 (NSF/ANSI 53, Waterdrop G3P600/G3P800 PFOA/PFOS) ↗CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓LeadEligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓FluorideEligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓BariumEligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓CadmiumEligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓Radium 226/228EligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓TDSEligibleNSF/ANSI 58-2024
CheckedChecked 2026-10-07 · recheck due 2027-01-05
✓Chlorine taste/odorEligibleNSF/ANSI 42
CertificationIAPMO certificate 19835 current 2026-10-07 · NSF/ANSI 42
IAPMO certificate 19835 (NSF/ANSI 42, Waterdrop G3P600/G3P800) ↗CheckedChecked 2026-10-07 · recheck due 2027-01-05
A target listed here does not mean that contaminant is present in your water.
How to verify a certified claim →Verify in the certifier’s registry ↗PurityMap analysis · bottom line
Certificate details reread in the IAPMO registry on 2026-11-06: certificate 19833 (NSF/ANSI 58; WD-G3P800 with membrane WD-G3P800-RO; lead, fluoride, cadmium, barium, radium 226/228 and TDS) and certificate 19838 (NSF/ANSI 53; WD-G3-CB cartridge, 1,100 gallons, PFOA/PFOS). Certificate 19835 (NSF/ANSI 42) last checked on 2026-10-07. Dimensions, power need, cartridge lives and the $159.97 average annual cost are from the Waterdrop product page on 2026-11-06. First checked against the NSF, WQA and IAPMO registries on 2026-09-23.Certified for PFOA/PFOS (NSF/ANSI 53) and for lead and fluoride (NSF/ANSI 58) at one kitchen tap. Not certified for arsenic or nitrate.
- ✓ IAPMO-certified to NSF/ANSI 58, 53 and 42
- ✓ Tankless: no storage tank under the sink
- – Needs a dedicated faucet and a power outlet
- – Produces some wastewater
Limitations and trade-offs
- Not certified for arsenic, nitrate or Total PFAS.
- Needs adequate incoming water pressure; a booster pump may be required in low-pressure homes.
- Manufacturer cartridge lives: CF pre-filter 6 months or 550 gallons, CB carbon cartridge 12 months or 1,100 gallons, RO membrane 24 months or 2,200 gallons.
- Needs a dedicated faucet (drilling)
- Produces some brine wastewater
- Needs under-sink space and a power outlet
No filter treats every water problem. This analysis does not replace household testing, installation requirements, or the manufacturer’s current performance data sheet.
Not suitable for
- Treating every tap in the home
- A whole-home hard-water or scale problem
- All PFAS: its evidence covers only the compounds it names
- Anyone who can't plumb, drill or hire an installer
- Renters who can't modify plumbing
Installation, ownership and maintenance
Capacity and upkeep are planning figures from the product record, not guarantees. Actual replacement timing depends on use, influent water, flow and the manufacturer’s instructions.- Manufacturer
- Waterdrop
- Model number
- WD-G3P800-W
- Installation format
- Under-Sink Filter
- Dimensions
- 18.11 × 5.67 × 17.73 in tankless under-sink unit, no storage tank (manufacturer)
- Rated capacity
- 1,100 gallons (NSF/ANSI 53 PFOA/PFOS rating, WD-G3-CB cartridge)
- Typical annual upkeep
- $160
Certification last checked Oct 7, 2026
Start from your water, not the product.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
Where to buy
Waterdrop G3P800 Tankless Reverse Osmosis Water Filter System, 800 GPD
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