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    Waterdrop G3P600 tankless RO system with black smart faucet
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    Reverse Osmosis Systems

    Waterdrop G3P600 Tankless RO

    Tankless RO system with smart faucet

    HU Editorial Team · Updated Sep 2026 · Method · Sources

    HU score
    Not scored
    How we scored
    Best for
    Smaller households that want tankless RO with a TDS faucet.
    Check today's pricePrice on waterdropfilter.com (Oct 9, 2026): $539.00

    Waterdrop has a $100-off checkout code for this unit: WDG3P600B ($539.00 to $439.00). Enter it at checkout; it is not applied automatically. Checked Oct 28, 2026.

    We may earn a commission if you buy through our link. The seller fulfills the order.

    Marketplace prices change often — verify the latest price before buying.

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    Evidence

    FormatUnder-sink RO
    Listed output / capacityManufacturer-listed 600 GPD
    InstallManufacturer-listed approximate DIY installation time: 30 minutes
    Seller-listed certificationNSF/ANSI 42 & 58 & 372 (as listed by the seller)
    Replacement intervalManufacturer-listed up to 24 months
    Price band$500 – $1,500
    What we did not testHU did not lab-test this unit. No contaminant-reduction, output, or durability result on this page is an HU measurement.

    Certifications are quoted as listed by the seller, with the standard name. Check the certifier's listing for the exact model.

    What Waterdrop states

    Specifications as listed by Waterdrop, read Oct 9, 2026. HU did not verify them. For reduction claims, read Waterdrop's Performance Data Sheet.

    ModelG3P600 (WD-G3P600-Black)
    Capacity600 GPD; fills an 8 oz cup in 8 seconds
    Stages8-stage; 0.0001 μm RO
    Drain ratio (Waterdrop: 'pure to drain')2:1
    FaucetSmart display faucet: real-time TDS, filter-change alert
    Install~30 minutes, no plumber required
    Filter life / list price on waterdropfilter.com (Oct 9, 2026)G3-N1CF up to 6 mo / 550 gal $29.99 · G3-N3CB up to 12 mo / 1,100 gal $29.99 · G3P600-RO up to 24 mo / 2,200 gal $109.99
    Dimensions18.11 × 5.67 × 17.73 in
    Weight32.4 lb
    CertificationWaterdrop lists: NSF/ANSI 42 & 58 & 372 (spec tab). Waterdrop's FAQ: certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 for lead-free material.
    Warranty / returns1-year warranty; 30-day returns

    Source: Waterdrop — G3P600 product page · checked Oct 9, 2026

    Price on waterdropfilter.com (Oct 9, 2026): $539.00

    Waterdrop has a $100-off checkout code for this unit: WDG3P600B ($539.00 to $439.00). Enter it at checkout; it is not applied automatically. Checked Oct 28, 2026.

    See the full specs

    Affiliate link: we may earn a commission at no cost to you.

    How it compares

    Under-sink RO systems HU already lists. Output, ratio and NSF/ANSI standards as each maker lists them; scores from our pages. No prices: Amazon prices were not re-read.

    SpecG3P800G3P600APEC ROES-50Home Master TMHP
    HU score9.5Not scored9.19.1
    TypeTankless under-sink ROTankless under-sink ROUnder-sink ROUnder-sink RO
    Output / ratio (maker)800 GPD, 3:1600 GPD, 2:1see reviewsee review
    NSF/ANSI listed by maker42, 53, 58, 37242, 58, 372see reviewsee review
    Size / weight18.11×5.67×17.73 in, 32.4 lbsame per Waterdrop——

    Our review

    Waterdrop lists the G3P600 as a tankless under-sink RO system with a 600 GPD rated output, a 2:1 drain ratio (Waterdrop: 'pure to drain'), an 8-stage configuration, and a smart faucet. These are manufacturer-reported specifications; actual output and performance depend on operating conditions.

    Pros

    • Manufacturer-listed 600 GPD rated output and 2:1 drain ratio
    • Manufacturer-listed 8-stage configuration

    Limits

    • Requires under-sink installation
    • RO filter replacement is needed; listed life is up to 24 months

    The HU recommendation

    Review current instructions and confirm that under-sink installation and replacement-filter requirements suit your setup.

    Also on Waterdrop's Amazon store: See price on Amazon

    Expert take

    Who should buy it

    The G3P600 is the same-size Waterdrop tankless RO at a lower price ($539 vs $999 for the G3P800 on waterdropfilter.com, Oct 9, 2026). You give up flow (600 vs 800 GPD), drain efficiency (2:1 vs 3:1) and NSF/ANSI 53 in Waterdrop's listing. For a small household, or anyone who mainly wants RO for drinking water, that's usually the better buy. It still needs under-sink space and an outlet.

    Price on waterdropfilter.com (Oct 9, 2026): $539.00

    Waterdrop has a $100-off checkout code for this unit: WDG3P600B ($539.00 to $439.00). Enter it at checkout; it is not applied automatically. Checked Oct 28, 2026.

    Check today's price

    Affiliate link: we may earn a commission at no cost to you.

    Reorder filters

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    Sources

    1. Waterdrop manufacturer documentation · specifications as listed by the seller; HU did not independently verify

    Shopping links lead to third-party sellers; HU does not sell, ship, or refund. Updated Sep 2026. Read how we score, how we make money, and the Product Information Disclaimer.

    For information about product claims, water quality, and shopping links, please refer to our Product Information Disclaimer.