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Aquasana Water Filters

Aquasana (owned by A. O. Smith since 2016) has a Claryum under-sink line and SmartFlow RO certified by WQA/IAPMO, but its Rhino whole-house and shower lines are only 'independently tested,' not on a certification listing.

Best for

  • An under-sink lead + PFOA/PFOS + microplastics reducer — the Claryum 3-Stage (NSF/ANSI 42 + 53 + 401)
  • Buyers needing a WQA-certified RO system covering NSF/ANSI 58 that retains beneficial minerals — the SmartFlow RO (AQ-SFRO2)
  • Households shopping a high-flow whole-house carbon + KDF chlorine-reduction system at ~600,000-gallon life — the Rhino (WH-1000 family)
  • Buyers who want one brand covering whole-house + drinking water + shower with consistent US-based customer service

Not recommended for

  • Buyers needing an NSF-listed performance cert on the Rhino whole-house or shower filters — they are 'independently tested,' not listed
  • Buyers reading OptimH2O EQ-OPTM as 'NSF/ANSI 53 certified' — IAPMO tested it, but it is not on an IAPMO certification listing
  • Buyers on tight filter-replacement budgets — Rhino / OptimH2O whole-house run $1,000-$3,000+ plus $80-$200/yr in replacement filters
  • Households who specifically need the NSF International certifier (or any cert mark) on the Rhino whole-house and shower lines
Premium tier — typically $500+
  • Certs:NSF/ANSI 42, 53, 58, 372, 401
  • 2 SKUs
  • $85–$3000
  • Parent:A.

Certification Reality: What's Actually Tested

This table shows the NSF/IAPMO/WQA-listed certifications for each Aquasana SKU we tracked, alongside the contaminants the brand markets but which do not appear on the third-party listing. Green chips are third-party verified; amber chips are marketing claims without a corresponding listing. Every row links to the live certifier database so you can verify the listed claim set yourself.

AQ-5300

Claryum 3-Stage Under-Sink Water Filter (AQ-5300; AQ-5300+ Max Flow variant) — the brand's flagship independently certified under-sink unit

Standards held

Performance

NSF/ANSI 42
NSF/ANSI 53
NSF/ANSI 401

What’s certified

  • Chlorine (Taste and Odor)
  • Lead
  • Mercury
  • Cysts (Cryptosporidium, Giardia)
  • Asbestos
  • Microplastics
  • PFOA
  • PFOS
  • VOCs
  • Atrazine
  • Lindane
  • Atenolol
  • Bisphenol A
  • Ibuprofen
  • Naproxen

Brand claims but NOT certified

  • Fluoride
  • Arsenic
  • Nitrate / Nitrite
  • Total Dissolved Solids
  • Chloramines
  • Hexavalent Chromium
  • Uranium
  • Bacteria / Viruses
Why these aren’t certified ↓
  • Fluoride (Claryum line does NOT remove fluoride — the brand's own SmartFlow RO and OptimH2O lines are the fluoride-targeted SKUs)
  • Arsenic (Claryum line does NOT cover arsenic — same point as fluoride)
  • Nitrate / Nitrite
  • Total Dissolved Solids (Claryum line preserves dissolved minerals — this is a brand marketing differentiator vs ZeroWater, not a removal claim)
  • Chloramines (the under-sink AQ-5300 carries chlorine NSF/ANSI 42 cert but NOT specifically chloramines — the Rhino Chloramines whole-house variant WH-1011 is the chloramine-targeted SKU)
  • Hexavalent Chromium
  • Uranium
  • Bacteria / Viruses

The Claryum 3-Stage (AQ-5300) is the brand's strongest certification story — 'WQA tested and certified to NSF/ANSI Standards 42, 53, and 401' is a legitimate third-party certification, equal in standing to NSF International certification under the same standards. WQA is ANSI-accredited. The only confusion is at the framing level. The brand consistently uses 'tested and certified' for this SKU, which is accurate (WQA did test it, then certified it). The risk is a buyer blurring this with the 'independently tested' (not certified) Rhino whole-house SKUs and forming a single 'all Aquasana is NSF-tier' impression that overstates the certification footprint of the broader lineup. The 'removes' framing is worth watching on the claim of 'Remove up to 99% of 78 contaminants' — the 78-contaminant count combines the WQA-certified compounds with the surrogate-tested ones from the certification datasheet, not 78 individually certified line items. And '99% lead removal' is a single-pass laboratory reduction at the certified NSF/ANSI 53 influent concentration (150 ppb for lead), not a guarantee of 99% removal at any arbitrary lead level.

Read more

NSF listing

View NSF listing

AQ-5200

Claryum 2-Stage Under-Sink Water Filter (AQ-5200) — same Claryum filtration with 2 stages instead of 3

Standards held

Performance

NSF/ANSI 42
NSF/ANSI 53
NSF/ANSI 401

What’s certified

  • Chlorine (Taste and Odor)
  • Lead
  • Mercury
  • Cysts (Cryptosporidium, Giardia)
  • Asbestos
  • Microplastics
  • PFOA
  • PFOS
  • VOCs
  • Atrazine
  • Lindane
  • Atenolol
  • Bisphenol A
  • Ibuprofen
  • Naproxen

Brand claims but NOT certified

  • Fluoride
  • Arsenic
  • Nitrate / Nitrite
  • Total Dissolved Solids
  • Chloramines
  • Hexavalent Chromium
  • Uranium
  • Bacteria / Viruses

The Claryum 2-Stage (AQ-5200) is the sister SKU to the AQ-5300 3-Stage: same WQA NSF/ANSI 42 + 53 + 401 certification scope, narrower physical filter stack. The brand markets both with the same '78 contaminants' language and the same 99% lead / 96% PFOA-PFOS / 97% chlorine reduction percentages — because they share the same Claryum filter media and the same WQA certification. The 2-Stage variant is the cost-conscious entry point ($220 vs $260) sharing the certification profile; the 3-Stage adds an extra mechanical pre-filtration stage for sediment-heavy water sources but does not extend the certified contaminant set. The same 'removes' framing applies to the 78-contaminant marketing copy.

Read more

NSF listing

View NSF listing

AQ-SFRO2

SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint

Standards held

Performance

NSF/ANSI 42
NSF/ANSI 53
NSF/ANSI 58
NSF/ANSI 401

What’s certified

  • Chlorine (Taste and Odor)
  • Chloramines
  • Lead
  • Mercury
  • Fluoride
  • Arsenic
  • Nitrate / Nitrite
  • Total Dissolved Solids
  • Cysts (Cryptosporidium, Giardia)
  • Asbestos
  • Microplastics
  • PFOA
  • PFOS
  • Pesticides
  • Herbicides
  • Cadmium
  • Copper
  • Atrazine
  • Lindane
  • Hexavalent Chromium
  • Atenolol
  • Bisphenol A
  • Ibuprofen
  • Naproxen

Brand claims but NOT certified

  • Bacteria / Viruses
  • Uranium
  • Radium 226/228
Why these aren’t certified ↓
  • Bacteria / Viruses (RO membranes do reject bacteria mechanically but the AQ-SFRO2 is not certified to NSF/ANSI 55 UV disinfection)
  • Uranium (not in the standard NSF/ANSI 58 certified list for this SKU)
  • Radium 226/228 (some RO systems cover this; the AQ-SFRO2 does not list it on the WQA cert scope)

The SmartFlow Reverse Osmosis (AQ-SFRO2) is the brand's strongest certification SKU — WQA tested and certified to NSF/ANSI 42 + 53 + 58 + 401 + CSA B483.1, the only Aquasana SKU certified to NSF/ANSI 58 (the standard that covers RO-format-specific contaminants: arsenic, fluoride, nitrate, TDS). At $199.99 retail (sale price; $449.99 regular) the SmartFlow RO is meaningfully cheaper than competitor RO systems with comparable certification scope (iSpring RCC7AK, APEC ROES-PH75) at similar quality tiers. The remineralization stage downstream of the RO membrane is the brand's marketing differentiator vs deionized-only RO competitors — the output water retains calcium, magnesium, and potassium so it does not taste 'flat' the way pure-deionized RO output does. The certification scope on this SKU genuinely is the broadest in Aquasana's lineup, and the tested-vs-certified and 'removes' concerns do not really apply here: the brand markets 'tested and certified' with reduction percentages that match the certification datasheet.

Read more

NSF listing

View NSF listing

WH-1000

Rhino Whole-House Water Filtration System (WH-1000 / EQ-1000) — the most-reviewed Aquasana product line; the centerpiece tested-vs-certified SKU

Standards held

NSF/ANSI/CAN 61

What’s certified

    Brand claims but NOT certified

    • Chlorine
    • Sediment / Particulate
    • Pesticides
    • Industrial Solvents
    • Lead
    • PFOA / PFOS
    • Cysts
    • Microplastics
    Why these aren’t certified ↓
    • Chlorine (brand claims 'up to 97% removal' but the 'tested to NSF/ANSI 42' language is brand-published lab data, NOT an NSF performance listing under NSF/ANSI 42)
    • Sediment / Particulate
    • Pesticides (the Rhino's KDF media is documented to reduce some pesticides, but the SKU is not on the NSF/ANSI 53 performance listing)
    • Industrial Solvents
    • Lead (brand does NOT claim Rhino lead removal — the OptimH2O whole-house line is the brand's lead-targeted whole-house SKU)
    • PFOA / PFOS (same point as lead)
    • Cysts (Cryptosporidium, Giardia)
    • Microplastics

    The Rhino WH-1000 is the clearest example of the tested-vs-certified distinction in the Aquasana lineup. The brand's own certified-products page uses two different phrasings on this single SKU: 'INDEPENDENTLY TESTED to NSF/ANSI Standard 42 to remove up to 97% of chlorine' for the performance claim — where the word 'tested' is doing the work — and 'Rhino tank tested and certified by WQA to NSF/ANSI/CAN 61 for Materials Safety Requirements and Structural Integrity Requirements' for the tank itself. The NSF/ANSI/CAN 61 certification is real: WQA, a third-party ANSI-accredited certifier, has certified that the tank materials don't leach lead or other contaminants into the water. But NSF/ANSI/CAN 61 is the material-safety standard, not the performance standard that says 'this filter removes X contaminants at Y reduction percentage.' The performance claim under NSF/ANSI 42 is brand-published lab data ('tested to'), not a certification listing. Seeing 'NSF/ANSI 42' and 'NSF/ANSI/CAN 61' together on the same Rhino product page can read as broader certification than the Rhino actually carries. The plain version: the Rhino's tank is third-party certified for material safety; the Rhino's chlorine-reduction performance is brand-tested but not third-party certified. The brand does not claim Rhino lead reduction, PFAS reduction, or microplastic reduction — those claims belong to the OptimH2O and Claryum lines, not the Rhino. The Rhino is a high-flow chlorine + sediment + KDF system at the 600,000-gallon service interval, sized for whole-house comfort filtration rather than targeted health-contaminant reduction.

    Read more

    NSF listing

    Listing TBD

    EQ-OPTM

    OptimH2O Whole-House Water Filtration System (EQ-OPTM) — the brand's lead-and-PFAS-targeted whole-house SKU; the centerpiece tested-not-listed SKU

    Standards held

    NSF/ANSI/CAN 61

    What’s certified

      Brand claims but NOT certified

      • Lead
      • PFOA / PFOS
      • Cysts
      • Chlorine
      • Chloramines
      • Microplastics
      • Hexavalent Chromium
      Why these aren’t certified ↓
      • Lead (brand claims 'IAPMO tested to NSF/ANSI 53 for up to 99% lead reduction' — testing is third-party data but is not the same as being on an IAPMO certification listing under NSF/ANSI 53)
      • PFOA / PFOS (brand claims 'up to 98% reduction' via IAPMO testing — same point as lead)
      • Cysts (Cryptosporidium, Giardia)
      • Chlorine (brand claims 'independently tested to NSF/ANSI 42 for up to 90% chlorine + chloramine reduction')
      • Chloramines
      • Microplastics
      • Hexavalent Chromium

      The OptimH2O EQ-OPTM is the clearest case in the Aquasana lineup of a single-contaminant test being read as broad certification, with the tested-vs-certified distinction also in play. The brand's marketing claim is 'IAPMO tested to NSF/ANSI Standard 53 to remove up to 99% of lead and cysts, and up to 98% of PFOA/PFOS.' The word 'tested' is doing critical work: IAPMO is a recognized third-party ANSI-accredited testing body, and the testing record is real. But 'IAPMO tested to NSF/ANSI 53' is not the same as being on the IAPMO certification listing under NSF/ANSI 53. A certification listing means IAPMO has independently verified the SKU meets the full standard's contaminant scope under the standard's specific testing protocols, and requires annual recertification. A testing record means IAPMO ran a specific test for specific contaminants and produced a certification datasheet. The under-sink Claryum Direct Connect (AQ-MF-1) is on a full IAPMO certification listing under NSF/ANSI 42 + 53 + 401; the OptimH2O whole-house has only an IAPMO testing record. Same certifier (IAPMO), different level of evidence. So the marketing implies broad health-cert coverage under NSF/ANSI 53 (lead, cysts, PFOA/PFOS — all real NSF/ANSI 53 contaminants), while the actual certification listing covers the Claryum line, not the whole-house EQ-OPTM. Buyers shopping for 'a whole-house lead and PFAS reduction system with third-party certification' should know that the OptimH2O has third-party testing but is not on a third-party certification listing — different categories of evidence, even though both come from IAPMO.

      Read more

      NSF listing

      Listing TBD

      AQ-MF-1

      Claryum Direct Connect Under-Sink Filter (AQ-MF-1) — the IAPMO-certified counterpart to the WQA-certified AQ-5300

      Standards held

      Performance

      NSF/ANSI 42
      NSF/ANSI 53
      NSF/ANSI 401

      What’s certified

      • Chlorine (Taste and Odor)
      • Chloramines
      • Lead
      • Mercury
      • Cysts (Cryptosporidium, Giardia)
      • Asbestos
      • Microplastics
      • PFOA
      • PFOS
      • VOCs
      • Atrazine
      • Lindane
      • Atenolol
      • Bisphenol A
      • Ibuprofen
      • Naproxen

      Brand claims but NOT certified

      • Fluoride
      • Arsenic
      • Nitrate / Nitrite
      • Total Dissolved Solids
      • Hexavalent Chromium
      • Uranium
      • Bacteria / Viruses
      Why these aren’t certified ↓
      • Fluoride (Claryum line does NOT remove fluoride — same as the under-sink AQ-5300)
      • Arsenic
      • Nitrate / Nitrite
      • Total Dissolved Solids
      • Hexavalent Chromium
      • Uranium
      • Bacteria / Viruses

      The Claryum Direct Connect (AQ-MF-1) is an instructive sister SKU: same Claryum filtration technology as the AQ-5300 / AQ-5200 under-sink line, certified to the same NSF/ANSI 42 + 53 + 401 standards, but by IAPMO instead of WQA — and with the added chloramines coverage that the under-sink AQ-5300 does not explicitly carry. Same brand, same filtration, same certification scope on paper, different ANSI-accredited certifier. The practical upshot: a buyer comparing 'Aquasana under-sink' SKUs sees both at similar retail price tiers ($170-$260) with similar marketing — but the AQ-MF-1 adds a chloramines certification the AQ-5300 lacks. Both are legitimate third-party certifications equal in standing; the only practical difference for the buyer is which certifier's database you'd search to independently verify (find.wqa.org for AQ-5300 vs pld.iapmo.org for AQ-MF-1).

      Read more

      NSF listing

      View NSF listing

      Check Certification for a Aquasana Filter

      This widget shows the third-party-listed certifications for Aquasana SKUs only. Type a model number to filter the list below — every result links to the full breakdown. To search across every brand we track, use the global certification tool.

      NSF/ANSI 3722 modelsNSF/ANSI 4012 modelsNSF/ANSI 422 modelsNSF/ANSI 532 modelsNSF/ANSI 582 models

      Listings as of Jun 4, 2026.

      About Aquasana

      Aquasana's filters are genuinely certified — but by WQA and IAPMO, not NSF, and only on some product lines. It's a US premium brand (founded 1994), owned by A. O. Smith Corporation (NYSE: AOS) since an $87 million acquisition from L Catterton on August 8, 2016.

      It sells the widest range of formats in home water treatment — under-sink, countertop, whole-house, shower, and UV — all built on its Claryum filtration (activated carbon, catalytic carbon, and ion-exchange media). The flagship under-sink filter (AQ-5300) is independently certified to cut 78 contaminants, including 97% of chlorine and 99% of lead and microplastics.

      The catch: Aquasana's marketing mixes real certifications with brand-run lab tests. The Marketing Language section below shows which lines are certified and which aren't. On NSF's own directory only the AQ-UV-MF and AQ-UV-SF UV systems (NSF/ANSI 55) appear; everything else is certified at WQA (find.wqa.org) or IAPMO (pld.iapmo.org).

      Founded:1994 (Aquasana, Inc., as an independent consumer-water-treatment brand) / August 8, 2016 (A. O. Smith Corporation acquisition)
      Headquarters:Executive and marketing team: Austin, Texas USA. Sales, customer service, and operations facility: 6310 Midway Road, Haltom City, TX 76117 USA (per NSF certifier listing for Aquasana, Inc.). Parent A. O. Smith Corporation HQ: 11270 West Park Place, Milwaukee, WI 53224 USA.
      Parent company:A.

      Ownership history

      1. 1994

        Aquasana, Inc. founded as an independent consumer-water-treatment brand headquartered in Austin, Texas. Initial product focus: countertop and shower carbon-block filters at the premium consumer tier, sold direct-to-consumer through the brand's website.

      2. Pre-2016

        Aquasana, Inc. held by L Catterton, a consumer-focused private equity firm. Under L Catterton ownership the brand achieved approximately 19% trailing-three-year revenue CAGR and approximately $44 million in expected 2016 sales, ~35% of which was recurring revenue from consumable replacement filters.

      3. 2016

        August 8, 2016: A. O. Smith Corporation (NYSE: AOS) completed the purchase of Aquasana, Inc. from L Catterton for $87 million in cash on a debt/cash-free basis. The acquisition price represented approximately 2× expected 2016 sales. A. O. Smith publicly framed Aquasana as a strategic fit to access the ~$2 billion US residential water treatment market, complementing A. O. Smith's then-leading RO product position in China.

      4. Post-2016

        Aquasana continues to operate under its existing brand name as a subsidiary of A. O. Smith Corporation. Aquasana CEO Todd Bartee (at the time of the acquisition) remained involved through the integration; the executive and marketing team continues to operate out of Austin, Texas, and the sales/operations facility in Haltom City, Texas, both pre-2016 locations retained post-acquisition. A. O. Smith Corporation maintains separate certifications in NSF's certification database under its own name (Milwaukee, WI HQ) for the AO-* prefixed product line — these are not Aquasana-branded products and operate as a parallel A. O. Smith product line.

      5. 2024

        Aquasana launches the SmartFlow Reverse Osmosis system (AQ-SFRO2), WQA-certified to NSF/ANSI Standards 42 + 53 + 58 + 401 + CSA B483.1 covering 90 contaminants. This is the brand's broadest cert footprint per single SKU and the realization of A. O. Smith's 2016 stated thesis of bringing RO technology to the US consumer market.

      Claryum Under-Sink Family (AQ-5300 3-Stage / AQ-5200 2-Stage / AQ-MF-1 Direct Connect)

      The flagship under-sink lineup.

      • Certified: 3-Stage (AQ-5300) and 2-Stage (AQ-5200) are WQA-certified to NSF/ANSI 42, 53, and 401; Direct Connect (AQ-MF-1) is IAPMO-certified to the same standards.
      • Removes: 78 contaminants — 97% of chlorine, 99% of microplastics and lead, 96% of PFOA/PFOS.
      • Variants: 3-Stage (AQ-5300), 2-Stage (AQ-5200), 3-Stage Max Flow (AQ-5300+, 44% faster flow, same cert scope), no-plumbing Direct Connect (AQ-MF-1).
      • Price: $170-$260; cartridges $60-$80 every ~6 months (600-gallon life).

      SmartFlow Reverse Osmosis System (AQ-SFRO2)

      Aquasana's broadest cert footprint. A remineralization stage keeps calcium, magnesium, and potassium (the edge vs deionized-only RO).

      • Certified: WQA-certified to NSF/ANSI 42, 53, 58, 401, and CSA B483.1.
      • Removes: 90 contaminants — 90% fluoride, 99.99% cysts, 99.9% asbestos, 99% lead/VOCs/microplastics, 96% chlorine/chloramines/arsenic/pesticides/herbicides, 95% PFOA/PFOS.
      • Price: $199.99-$449.99.

      Clean Water Machine (AQ-CWM2) — countertop Claryum dispenser

      Countertop electric dispenser on the same Claryum filtration as the under-sink line.

      • Certified: WQA-certified to NSF/ANSI 42, 53, and 401.
      • Removes: 78 contaminants — 99% of microplastics, lead, and cysts; 97% of chlorine; 96% of mercury; 95% of PFOA/PFOS and VOCs.
      • Price: $200+ tier — the lineup's closest thing to a pitcher, competing with high-end ZeroWater and Brita Total360 countertop systems.

      Rhino Whole-House Family (WH-1000 / WH-1010 / WH-1011 / WH-1021 / EQ-1000)

      The most-reviewed whole-house system, at 600,000-gallon / ~6-year service life.

      • Certified: tank is WQA-certified to NSF/ANSI/CAN 61 — material safety, not performance.
      • Removes: chlorine reduction is brand-tested, not listed — 'independently tested to NSF/ANSI 42' for up to 97% chlorine (83% chloramines on that variant).
      • Variants: WH-1000 base; WH-1010 Max Flow; WH-1011 Chloramines (carbon + KDF for chloraminated water); WH-1021 Chloramines Max Flow; Rhino Well Water UV variant (adds NSF/ANSI 55); EQ-1000.
      • Price: $1,000-$2,800; pre-filters ~$30-$50 every 2 months.

      OptimH2O Whole-House (EQ-OPTM) — lead-and-PFAS-targeted

      Whole-house SKU (EQ-OPTM) for point-of-entry lead and PFAS reduction.

      • Certified: the IAPMO test record is real, but the SKU is tested, not IAPMO-listed under NSF/ANSI 53. The trap: 'tested to NSF/ANSI 53' reads like 'NSF certified,' but the actual listing lives on the Claryum under-sink line, not here.
      • Removes: marketed as 'IAPMO tested to NSF/ANSI 53' for up to 99% of lead and cysts and up to 98% of PFOA/PFOS — 'tested' is load-bearing; also 'independently tested to NSF/ANSI 42' for up to 90% of chlorine and chloramines.

      AQ-4100 / AQ-4105 Shower Filter Family

      Shower filters.

      • Certified: not on any NSF, WQA, or IAPMO listing — 'tested' means brand-published data only (AQ-4100-4105_Performance_Data.pdf).
      • Removes: 'independently tested to NSF/ANSI 177 to remove up to 90% of chlorine in shower water' — the shower-filter chlorine standard.
      • Variants: AQ-4100 wall-mount; AQ-4105 adds a handheld wand.
      • Price: $85-$160.

      AQ-UV-MF / AQ-UV-SF Ultraviolet Disinfection (Point-of-Entry)

      Aquasana's only SKUs on the public NSF directory (as of 2026-05-23). Usually sold as add-ons to the Rhino Well Water system.

      • Certified: both NSF-certified to NSF/ANSI 55 (UV Disinfection, Class B) under 'Aquasana, Inc.'; both also carry NSF/ANSI/CAN 372 (lead-free plumbing) and conform to NSF/ANSI/CAN 61 (material safety).
      • Variants: AQ-UV-MF runs 19 gpm (AQ-UV-510L bulb); AQ-UV-SF runs 6 gpm (AQ-UV-300L bulb).

      US sales and operations hub: 6310 Midway Road, Haltom City, TX 76117 — the manufacturer-of-record on the NSF UV-system listings (AQ-UV-MF, AQ-UV-SF).

      Since 2016 Aquasana is a subsidiary of A. O. Smith Corporation (NYSE: AOS), headquartered at 11270 West Park Place, Milwaukee, WI 53224 — a global water-heater and water-treatment maker operating in 16 countries.

      The brand does not disclose component country-of-origin for the Claryum filter media, Rhino tank steel, or shower-filter parts.

      Which Aquasana Filter Is Right for You?

      We mapped each Aquasana SKU’s NSF-listed certifications against the 10 contaminants people search for most. Where Aquasana doesn’t have a certified SKU, we say so.

      Lead
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Lead (Aquasana).
      PFAS
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for PFAS (Aquasana).
      Fluoride
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Fluoride (Aquasana).
      Arsenic
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Arsenic (Aquasana).
      Nitrate
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Nitrate (Aquasana).
      Chromium-6
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Chromium-6 (Aquasana).
      Mercury
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Mercury (Aquasana).
      Atrazine
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Atrazine (Aquasana).
      Chloroform
      Not the right choice if Chloroform is your priority — no certified Aquasana SKU for Chloroform. Consider an NSF/ANSI 53-listed filter.
      Cysts
      Best pick: SmartFlow Reverse Osmosis System (AQ-SFRO2) — the brand's broadest single-SKU cert footprint — certified for Cysts (Aquasana).

      How Aquasana Compares

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300) vs Brita Elite (OB06) Pour-Through Pitcher

      Format

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Under-sink hard-plumbed filter with proprietary Claryum filtration (activated carbon + catalytic carbon + ion-exchange resin)

      Brita Elite (OB06) Pour-Through Pitcher

      Activated-carbon pour-through pitcher with Brita Longlast+ (OB06) cartridge

      Third-party certifier

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      WQA (Water Quality Association — ANSI-accredited)

      Brita Elite (OB06) Pour-Through Pitcher

      NSF International (Midland, Ontario / Dominican Republic — The Brita Products Company)

      Certification language

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      'WQA tested and certified to NSF/ANSI Standards 42, 53, and 401' — on a third-party certification listing with annual recertification under WQA

      Brita Elite (OB06) Pour-Through Pitcher

      'NSF Certified to NSF/ANSI 53 for Lead Reduction' — on NSF's certification listing under The Brita Products Company

      NSF/ANSI 42 (Chlorine T&O)

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Yes (WQA-certified)

      Brita Elite (OB06) Pour-Through Pitcher

      Yes (NSF-certified)

      NSF/ANSI 53 — Lead reduction

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Yes (WQA-certified)

      Brita Elite (OB06) Pour-Through Pitcher

      Yes (NSF-certified)

      NSF/ANSI 53 — PFOA/PFOS

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Yes (96% reduction at certified influent concentration)

      Brita Elite (OB06) Pour-Through Pitcher

      No (Brita Elite is NOT certified for PFAS)

      NSF/ANSI 53 — Cysts / Microplastics

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Yes (99% reduction on microplastics + Cryptosporidium / Giardia cysts)

      Brita Elite (OB06) Pour-Through Pitcher

      Yes microplastics (NSF/ANSI 401 cert covers microplastics on Brita Elite)

      NSF/ANSI 401 (emerging contaminants — BPA, ibuprofen)

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Yes (BPA, atenolol, carbamazepine, ibuprofen, naproxen)

      Brita Elite (OB06) Pour-Through Pitcher

      Yes (BPA, atenolol, ibuprofen, microplastics)

      Fluoride / Arsenic / TDS

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      No (under-sink Claryum line does NOT remove fluoride, arsenic, or TDS — those need the SmartFlow Reverse Osmosis SKU)

      Brita Elite (OB06) Pour-Through Pitcher

      No (Brita Elite covers chlorine taste, lead, microplastics only)

      Filter life

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      600 gallons / ~6 months on the AQ-5300 / AQ-5300+

      Brita Elite (OB06) Pour-Through Pitcher

      120 gallons / ~6 months on the OB06 Elite cartridge

      Initial retail

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      $170-$260 (system + first filter cartridge)

      Brita Elite (OB06) Pour-Through Pitcher

      $30-$45 (pitcher + first OB06 cartridge)

      Annual filter cost (family of 4)

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      ~$120-$160 (2 cartridges/year at $60-$80 each)

      Brita Elite (OB06) Pour-Through Pitcher

      ~$36-$48 (2 OB06 cartridges/year at $18-$24 each)

      Installation

      Aquasana Claryum 3-Stage Under-Sink (AQ-5300)

      Under-sink hard plumbing required (or AQ-MF-1 Claryum Direct Connect for no-plumbing variant)

      Brita Elite (OB06) Pour-Through Pitcher

      Pour into pitcher, refill manually

      Bottom line: a format and budget call, not a cert-quality one. Both carry legitimate NSF/ANSI 42 + 53 + 401 certs (Aquasana via WQA, Brita via NSF), equivalent in standing. Claryum 3-Stage is an under-sink system at $170-$260; Brita Elite is a $35 pitcher.

      • Pick Claryum 3-Stage (AQ-5300) if you face lead-service-line or PFAS risk — it adds PFOA/PFOS, asbestos, and cysts Brita lacks, lasts 600 vs 120 gallons per cartridge (5× longer), and filters at the tap.
      • Pick Brita Elite if you want low cost and no install — $35 vs $200+, ~$36-$48 vs ~$120-$160/year in filters.

      Sources for facts in this comparison

      1. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        Aquasana Claryum 3-Stage WQA cert scope (NSF/ANSI 42 + 53 + 401); 78 contaminants including PFOA/PFOS, lead, microplastics; reduction percentages 97% chlorine, 99% lead/microplastics, 96% PFOA/PFOS

      2. NSF listingaccessed: 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=The+Brita+Products+Company

        Brita Elite (OB06) NSF International listing under The Brita Products Company; NSF/ANSI 42 + 53 + 401 cert scope on the pitcher line; lack of PFAS coverage on the Elite line

      3. Tier-1 journalismaccessed: 2026-05-23
        https://waterfilterguru.com/best-under-sink-water-filter-reviews/

        Independent third-party (Water Filter Guru) hands-on lab testing of under-sink filters including Claryum 3-Stage; comparative benchmarks on filter life, annual cost, and contaminant scope vs pour-through pitchers like Brita Elite

      Aquasana Rhino Whole-House (WH-1000) vs APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Format

      Aquasana Rhino Whole-House (WH-1000)

      Single-stage whole-house tank with proprietary carbon + KDF + media mix; 600,000-gallon / ~6-year rated service life

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Two-stage Big Blue housing with separate sediment + carbon block cartridges; ~50,000 gallon service per cartridge typical

      Third-party certifier

      Aquasana Rhino Whole-House (WH-1000)

      WQA (tank only — NSF/ANSI/CAN 61 material safety)

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      WQA-certified individual cartridges (NSF/ANSI 42 chlorine + sediment); housing material-safety varies by SKU

      Performance-listing certifier

      Aquasana Rhino Whole-House (WH-1000)

      NONE — performance is brand-published 'tested to NSF/ANSI 42 for 97% chlorine reduction,' not an NSF or WQA performance listing

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      WQA listing for individual cartridges (CB-CARBON-10 cartridge is WQA-certified to NSF/ANSI 42)

      Material safety (NSF/ANSI/CAN 61)

      Aquasana Rhino Whole-House (WH-1000)

      Yes — Rhino tank is WQA-certified to NSF/ANSI/CAN 61

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Varies by SKU; some APEC housings carry NSF/ANSI/CAN 61

      Chlorine reduction (brand-published)

      Aquasana Rhino Whole-House (WH-1000)

      Up to 97%

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Up to 99% via carbon block

      Chloramines

      Aquasana Rhino Whole-House (WH-1000)

      Rhino base WH-1000 = no; Rhino Chloramines (WH-1011) = up to 83% (brand-published, 'independently tested')

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Catalytic carbon cartridge upgrade required (separate SKU); standard CB1-CARBON10 covers chlorine only

      Service life

      Aquasana Rhino Whole-House (WH-1000)

      600,000 gallons / ~6 years on the WH-1000 tank

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      ~50,000-100,000 gallons per cartridge typical; replace cartridges annually

      Pre-filter requirement

      Aquasana Rhino Whole-House (WH-1000)

      Yes — Aquasana sells the AO-WH-PRE pre-filter cartridges as ~$30-$50 every 2 months consumable

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Built into the 2-stage housing (the first stage IS the sediment pre-filter); no separate pre-filter purchase

      Initial cost

      Aquasana Rhino Whole-House (WH-1000)

      $1,000-$2,800 (base WH-1000 ~$1,000; Max Flow + Chloramines variants ~$1,400-$2,800)

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      $200-$400 (CB1 series 2-stage Big Blue housing + initial cartridges)

      Installation complexity

      Aquasana Rhino Whole-House (WH-1000)

      Whole-house plumbing tie-in required at main water line; professional installation typically $300-$500

      APEC Whole House (CB1-SED10-BB / CB1-CARBON10-BB)

      Same — whole-house plumbing tie-in required; APEC's lighter format may be DIY-friendlier

      Bottom line: premium proprietary vs commodity Big Blue — and the cert paper favors APEC. APEC's CB-CARBON-10 cartridge holds a real WQA listing under NSF/ANSI 42 (find.wqa.org); the Rhino's chlorine performance is brand-tested, not listed, with its WQA cert covering only tank material safety (NSF/ANSI/CAN 61).

      • Pick the Rhino (WH-1000) if you value convenience — one tank, 600,000-gallon / ~6-year life, no cartridge swaps after the pre-filter — and will pay the premium.
      • Pick APEC's CB1 series if you want cert transparency, lower cost (~$300 vs ~$1,000+), and DIY install.

      Sources for facts in this comparison

      1. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        Rhino whole-house family (WH-1000 / WH-1010 / WH-1011 / WH-1021) 'independently tested to NSF/ANSI Standard 42' chlorine reduction language; Rhino tank 'tested and certified by WQA to NSF/ANSI/CAN 61'; 600,000-gallon / ~6-year service life

      2. NSF listingaccessed: 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Aquasana

        NSF's certification database absence of any Aquasana Rhino SKU under any company-name variant — confirming the brand's performance-cert claim is via brand-published testing, not third-party listing

      3. Brand officialaccessed: 2026-05-23
        https://www.homedepot.com/p/Aquasana-Rhino-Whole-House-Water-Filtration-System-with-Carbon-and-KDF-Home-Water-Filtration-Reduces-Sediment-and-Chlorine-WH-1000/326435031

        Home Depot product listing for Aquasana Rhino WH-1000 — confirms the dual cert language and retail framing

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2) vs iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      Format

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      5-stage RO system with remineralization stage (calcium, magnesium, potassium retained); tankless smart-meter design

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      6-stage RO system with alkaline remineralization cartridge as final stage; pressurized tank design

      Third-party certifier

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      WQA (Water Quality Association — ANSI-accredited)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      NSF International (NSF/ANSI 58 listing under iSpring Water Systems LLC)

      Certification language

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      'WQA tested and certified to NSF/ANSI Standards 42, 53, 58, 401, and CSA B483.1' — on a third-party WQA certification listing

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      'NSF/ANSI 58 Certified for TDS Reduction' — on NSF International's certification listing under iSpring Water Systems LLC

      NSF/ANSI 58 (RO performance — TDS, arsenic, fluoride, nitrate)

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      Yes (WQA-certified)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      Yes (NSF-certified)

      NSF/ANSI 53 (lead, PFOA/PFOS, cysts)

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      Yes — adds NSF/ANSI 53 cert beyond the typical RO 58 scope

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      No — iSpring RCC7AK NSF cert is 58 only, not 53

      NSF/ANSI 42 + 401

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      Yes (chlorine + emerging contaminants)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      Not explicitly NSF-certified to 42 or 401

      Contaminant count (brand-claimed)

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      90 contaminants (including 90% fluoride, 99.99% cysts, 99.9% asbestos, 99% lead, 96% chlorine/chloramines/arsenic/pesticides/herbicides, 95% PFOA/PFOS)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      ~1,000+ contaminants typical of RO membranes (NSF/ANSI 58 covers TDS, arsenic, fluoride, nitrate, lead, hexavalent chromium, etc.)

      Remineralization

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      Yes — built-in stage retaining calcium, magnesium, potassium (brand differentiator)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      Yes — alkaline cartridge as 6th stage

      Daily production

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      Tankless smart-meter; on-demand high-flow

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      75 GPD (gallons per day) production rate with pressurized tank

      Initial retail

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      $199.99 (sale) - $449.99 (regular)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      $200-$300 typical

      Annual filter cost

      Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)

      ~$120-$180 (multi-cartridge annual replacement)

      iSpring RCC7AK Reverse Osmosis (6-Stage with Alkaline Remineralization)

      ~$60-$120 (sediment + carbon every 6-12 months; RO membrane every 2-3 years)

      Bottom line: the most cert-rich matchup in the lineup — both are legitimately certified RO systems with remineralization. SmartFlow is WQA-certified to NSF/ANSI 42 + 53 + 58 + 401 + CSA B483.1; iSpring's RCC7AK holds the NSF/ANSI 58 RO listing under NSF. Both reject fluoride, arsenic, and TDS regardless of cert scope.

      • Pick SmartFlow RO (AQ-SFRO2) if you want cert breadth — it adds NSF/ANSI 53 (lead + PFOA/PFOS) and 401 beyond the standard 58 scope, in a tankless design.
      • Pick iSpring RCC7AK if you want the best-known certifier (NSF) and lower filter cost (~$60-$120 vs ~$120-$180/year).

      Sources for facts in this comparison

      1. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        SmartFlow Reverse Osmosis (AQ-SFRO2) WQA cert scope NSF/ANSI 42 + 53 + 58 + 401 + CSA B483.1 covering 90 contaminants; 90% fluoride, 99% lead, 95% PFOA/PFOS reduction percentages

      2. NSF listingaccessed: 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=iSpring

        iSpring Water Systems LLC NSF International listing for the RCC7AK RO system — NSF/ANSI 58 performance certification on the public NSF's certification database

      Looking for a broader comparison? See our full under-sink filter roundup.

      Explore other brands: APEC Water Systems, AquaBliss, Aquaboon, AquaTru, iSpring, Kind Water Systems, Multipure, LifeStraw, Whirlpool, Solventum, SpringWell Water Filtration Systems, Pentair, Omnipure, Pelican Water, Crystal Quest, Hydroviv, Brondell, Bluevua, Berkey, ZeroWater, Express Water, Frizzlife, Epic Water Filters, Culligan, Clearly Filtered, Waterdrop, PUR, Doulton, Brita, and Propur.

      What Reddit Says About Aquasana

      These quotes are paraphrased — not verbatim — from public Reddit threads. Each card links to the original thread so you can read the discussion in context and verify the sentiment for yourself.

      r/waterMixed
      “A user weighing the Aquasana Rhino whole-house investment described the system as a real chlorine and general-water-feel improvement after install, but cautioned that it did not magically eliminate scale or biological growth — meaning the Rhino is doing the chlorine-and-sediment job it markets, but is not a softener or UV substitute for households needing those layers separately.”
      View thread
      r/WaterTreatmentNeutral
      “A two-year owner of the Aquasana under-sink RO reported no leak issues and convenient subscription-driven filter replacement, but flagged the relatively slow flow rate as the main practical drawback — especially noticeable when feeding a refrigerator water line off the same RO output.”
      View thread
      r/HomeImprovementPositive
      “A Rhino owner contributing to the whole-house filtration recommendation thread positioned the Aquasana Rhino as a 10-year-lifetime system at the premium tier — confirming the brand's marketing of the long service interval as the genuine differentiator for households willing to absorb the higher initial cost.”
      View thread
      r/BuyItForLifePositive
      “A user who installed a Rhino whole-house system with the UV add-on reported a clean well-water test panel a few months later, framing the result as the system effectively doing what it promised — but noted the install itself took around 12 hours and was non-trivial for the average DIY-er.”
      View thread
      r/WaterTreatmentPositive
      “A whole-house brand-recommendation thread named Aquasana alongside Fleck, APEC, and Clack as the legacy-brand picks worth shortlisting, with the explicit caveat to stick with NSF/ANSI 42/53 certified systems and avoid generic Amazon brands — implicitly placing Aquasana in the certified-systems category that buyers should consider.”
      View thread

      Quotes verified on 2026-05-23.

      Aquasana Customer Reviews Summary

      15,000Total Reviews
      4.5
      Average

      What Customers Love

      • The Claryum 3-Stage (AQ-5300) and SmartFlow Reverse Osmosis (AQ-SFRO2) carry genuine, broad WQA third-party certifications (NSF/ANSI 42 + 53 + 401 on Claryum; adds 58 + CSA B483.1 on SmartFlow RO) that are independently verifiable at find.wqa.org.
      • The Rhino whole-house's long service life (600,000 gallons / ~6 years) outlasts competing whole-house carbon systems and spreads the higher upfront cost over multiple years.
      • The SmartFlow RO's remineralization stage retains calcium, magnesium, and potassium, which reduces the 'flat water' complaint common with RO systems.
      • Aquasana's filter-subscription service automates replacement timing and is widely cited as a convenience win by the Reddit community.
      • Customer service from the US-based Haltom City, TX team is generally rated positively (4.5 star average on Trustpilot, with the usual long tail of complaint reviews common to e-commerce brands).

      Common Concerns

      • Marketing copy on the Rhino and OptimH2O whole-house lines uses 'tested to NSF/ANSI Standard 42' (or '53') language that buyers commonly read as 'NSF certified' — the Rhino tank is WQA-certified to NSF/ANSI/CAN 61 for material safety, but no Rhino or OptimH2O SKU is on an NSF performance certification listing.
      • Annual filter cost on the Claryum under-sink line ($120-$160/year for a family of 4) runs higher than competing under-sink filters (iSpring 3-stage ~$60/year; APEC CB-3 ~$80/year), partly offset by the longer 600-gallon service interval and broader contaminant scope.
      • Slow flow rate on the SmartFlow RO and Claryum 3-Stage is the most-cited functional drawback in Reddit threads, especially when feeding a refrigerator ice maker or filling a large pitcher off the RO output.
      • High initial cost on the Rhino whole-house line ($1,000-$2,800 base unit; reaches $3,000+ with Salt-Free Conditioner + UV add-ons) is a significant barrier versus commodity Big Blue 2-stage whole-house systems at ~$300.
      • Some users report installation difficulty on the Rhino whole-house, with Reddit reports citing ~12-hour DIY installs and the need for professional plumbing help on multi-bath houses; the brand does not include installation in the base price.

      The brand's own About Us page cites 15,000+ five-star reviews aggregated across its catalog; Amazon ratings on the bestselling Claryum 3-Stage (AQ-5300) and Rhino WH-1000 hover around 4.4-4.5 stars across thousands of reviews.

      Hands-on third-party reviews (Water Filter Guru, BOS Water, ThirdWave Water) generally rate the Aquasana Claryum under-sink and SmartFlow RO as category-leading on contaminant scope at the price tier.

      The Rhino whole-house gets more mixed reviews — strong on convenience and service life, weaker on certification transparency, since the performance claims are brand-tested rather than on a third-party certification listing.

      Sources for Aquasana review data

      1. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/about-us

        Brand-official 'Our Story' page cites '15,000+ five-star reviews' aggregated across the catalog; documents the 100+ employee Austin TX + Haltom City TX operating model

      2. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        Brand-official certified-products page documents the cert language patterns and per-SKU cert scope — the source of the WQA / IAPMO / 'tested to' distinctions documented in this review

      3. Tier-1 journalismaccessed: 2026-05-23
        https://waterfilterguru.com/best-under-sink-water-filter-reviews/

        Independent third-party (Water Filter Guru) hands-on lab testing of multiple under-sink filter systems documents the Claryum 3-Stage's category-leading position in the under-sink lead + PFAS reduction tier at the $200-$300 retail point

      4. Amazon reviewaccessed: 2026-05-23
        https://www.trustpilot.com/review/www.aquasana.com

        Trustpilot aggregate customer service reviews for aquasana.com — long-tail mix of 5-star reviews on the Claryum line and complaint reviews on Rhino installation and customer-service responsiveness during pre-acquisition transitions

      Review data aggregated from verified Amazon purchases. Individual results may vary.

      About Aquasana Marketing Language

      Some claims on Aquasana packaging and product pages are frequently confused with what the underlying third-party certifications actually cover. The note below documents one such mismatch with primary-source citations so you can verify the specifics yourself.

      Aquasana uses three different phrasings on the same 'Aquasana Certified Products' page — 'WQA tested and certified', 'IAPMO tested', and 'independently tested' — and only the first two mean the product is actually on a certification listing.

      Bottom line: "tested to" a standard and "certified to" it are not the same thing — and Aquasana uses both on the same page. Three tiers:

      • Genuinely certified — independently tested, publicly listed, and renewed yearly — for NSF/ANSI 42, 53, and 401: the under-sink Claryum line (3-Stage AQ-5300, AQ-5300+, 2-Stage AQ-5200), SmartFlow RO (AQ-SFRO2), and Clean Water Machine (AQ-CWM2) via WQA, plus the Claryum Direct Connect (AQ-MF-1) via IAPMO. Verify at find.wqa.org or pld.iapmo.org.
      • Tested, not certified — the OptimH2O whole-house (EQ-OPTM): a real IAPMO test showing up to 99% of lead and cysts and 98% of PFOA/PFOS, but no ongoing listing under NSF/ANSI 53.
      • Brand-tested only — the Rhino whole-house (WH-1000, WH-1010, WH-1011, WH-1021, EQ-1000) and shower filters (AQ-4100 / AQ-4105): the company's own lab data for NSF/ANSI 42 and 177, on no public NSF list as of 2026-05-23.

      What to watch: the Rhino tank is WQA-certified to NSF/ANSI/CAN 61, but that covers tank material safety, not filter performance. If you want certified whole-house lead or PFAS removal, the certification sits on the under-sink Claryum line — not the whole-house units. And "99% lead" is a lab figure at the test level (150 ppb); homes with very high lead can see less.

      Sources

      1. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        Brand-official certified-products page documents three distinct phrasings ('WQA tested and certified', 'IAPMO tested', 'independently tested') across the SKU lineup — primary-source evidence of the tested-vs-certified distinction in the brand's own marketing

      2. NSF listingaccessed: 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Aquasana

        Primary-source evidence: NSF's certification database search for company name 'Aquasana' returns only 2 products (AQ-UV-MF, AQ-UV-SF) under NSF/ANSI 55 UV disinfection. No Claryum, Rhino, SmartFlow RO, OptimH2O, AQ-4100, or AQ-4105 SKUs appear under the Aquasana name as of 2026-05-23

      3. NSF listingaccessed: 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=A.O.+Smith

        Primary-source evidence: NSF's certification database search for parent company 'A.O. Smith' returns the AO-* prefixed product line under A.O. Smith Corporation (Milwaukee, WI) — these are A.O. Smith parent-brand SKUs, NOT Aquasana consumer SKUs. Confirms the cross-brand boundary

      4. Brand officialaccessed: 2026-05-23
        https://www.aquasana.com/info/performance-data-sheets-pd.html

        Brand-official explainer on certification datasheets explicitly distinguishes brand-published testing from third-party certification: 'If it was done by the manufacturer directly, it may be less trustworthy than a test done by an independent third-party testing group like the Water Quality Association (WQA) or The International Association of Plumbing & Mechanical Officials (IAPMO).' Confirms the brand recognizes the testing-vs-certification distinction

      5. SEC filingaccessed: 2026-05-23
        https://investor.aosmith.com/news-releases/news-release-details/o-smith-acquires-water-treatment-company-aquasana

        Primary-source evidence: A. O. Smith Corporation acquisition of Aquasana on August 8, 2016 for $87 million; brand structure post-acquisition (Aquasana as A.O. Smith subsidiary; parent A.O. Smith keeps separate certifications in NSF's certification database for its own AO-* product line)

      Verified 2026-05-23.

      Frequently Asked Questions About Aquasana Water Filters

      Partly — the certs that matter live at WQA and IAPMO, not NSF. On NSF's own directory, the only Aquasana SKUs are the AQ-UV-MF and AQ-UV-SF UV systems (NSF/ANSI 55).

      • Genuinely certified — Claryum 3-Stage (AQ-5300), 2-Stage (AQ-5200), SmartFlow RO (AQ-SFRO2), and Clean Water Machine (AQ-CWM2) via WQA (NSF/ANSI 42, 53, 401, plus 58 on the RO); Claryum Direct Connect (AQ-MF-1) via IAPMO. Both are ANSI-accredited, equivalent in standing to NSF.
      • Brand-tested, not listed — the Rhino whole-house, OptimH2O (EQ-OPTM), and shower filters (AQ-4100 / AQ-4105) are 'independently tested' to NSF/ANSI 42, 53, or 177. The Rhino tank is WQA-certified to NSF/ANSI/CAN 61 for material safety only.

      Before trusting any cert marketing, check your water quality by ZIP code. WQA (Water Quality Association, find.wqa.org) listings are searchable too.

      Sources: [1] [2]

      How We Researched Aquasana

      Our brand assessments follow a four-tier source ladder. We start with Tier 1 primary sources — NSF International, IAPMO, and WQA certification listings, plus SEC filings and EPA records — to establish what is third-party verified. We then layer in brand-official statements (corporate sites, datasheets, support pages) for context, tier-1 journalism for independent reporting, and community signals (Reddit threads, Amazon reviews) for real-world ownership experience. Every claim on this page traces back to one of the citations below.

      Reviewed by TapWaterData Editorial.

      Last full review: 2026-05-23 · Next scheduled review: 2027-05-23

      All sources (14)

      1. NSF listingAccessed 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=Aquasana

        Primary-source listing in NSF's certification database under 'Aquasana, Inc.' — AQ-UV-MF and AQ-UV-SF UV systems certified to NSF/ANSI 55 (Disinfection Performance, Class B); manufacturer address 6310 Midway Road, Haltom City, TX 76117. Confirms zero Claryum, Rhino, SmartFlow RO, OptimH2O, or AQ-4000 SKUs in NSF's certification database under the Aquasana name as of 2026-05-23

      2. NSF listingAccessed 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=A.O.+Smith

        Primary-source listings in NSF's certification database under 'A.O. Smith Corporation' (Milwaukee, WI) and 'A.O. Smith Water Treatment (North American), Inc.' (Appleton, WI) — covering the AO-* prefixed parent-brand product line (AO-IM, AO-MF-B, AO-WH-PREV, AO-WH-FILTER) under NSF/ANSI 42 and the AORO-50 RO system under NSF/ANSI 58. Confirms the parent A.O. Smith Corporation keeps its own NSF certifications separately from the Aquasana subsidiary

      3. SEC filingAccessed 2026-05-23
        https://investor.aosmith.com/news-releases/news-release-details/o-smith-acquires-water-treatment-company-aquasana

        Primary-source investor-relations press release: A. O. Smith Corporation acquisition of Aquasana, Inc. completed August 8, 2016 for $87 million in cash on a debt/cash-free basis; acquired from L Catterton consumer-focused PE firm; $44M expected 2016 sales; 35% consumable revenue; 19% three-year revenue CAGR pre-acquisition; A.O. Smith stated strategic thesis of bringing RO technology to the US consumer market

      4. Brand officialAccessed 2026-05-23
        https://www.aquasana.com/info/aquasana-certified-products-pd.html

        Brand-official 'Aquasana Certified Products' page documents distinct phrasings ('WQA tested and certified', 'IAPMO certified', 'IAPMO tested', 'independently tested') across the SKU lineup — primary-source evidence of the tested-vs-certified distinction in the brand's own marketing copy; per-SKU certification scope for Claryum 3-Stage, Claryum 2-Stage, Claryum Direct Connect, SmartFlow Reverse Osmosis, Clean Water Machine, Rhino family, OptimH2O, and AQ-4100/AQ-4105 shower filters

      5. Brand officialAccessed 2026-05-23
        https://www.aquasana.com/info/performance-data-sheets-pd.html

        Brand-official explainer on how to read certification datasheets, including the brand's own framing that manufacturer-direct tests are less trustworthy than independent third-party WQA or IAPMO certification — primary-source confirmation that the brand recognizes the testing-vs-certification distinction

      6. Brand officialAccessed 2026-05-23
        https://www.aquasana.com/about-us

        Brand-official 'Our Story' page: Austin TX executive/marketing team; Haltom City TX sales/operations facility; 100+ employees; 15,000+ five-star reviews aggregated across the catalog; both pre-2016 locations retained post-A.O. Smith acquisition

      7. Brand officialAccessed 2026-05-23
        https://www.aquasana.com/under-sink-water-filters/smart-flow-reverse-osmosis/chrome-100385796.html

        Brand-official product page for SmartFlow Reverse Osmosis (AQ-SFRO2) documenting retail $199.99 (reduced from $449.99); WQA tested and certified to NSF/ANSI Standards 42, 53, 58, 401, and CSA B483.1 covering 90 contaminants including 90% fluoride, 99% lead, 95% PFOA/PFOS

      8. Brand officialAccessed 2026-05-23
        https://www.homedepot.com/p/Aquasana-Rhino-Whole-House-Water-Filtration-System-with-Carbon-and-KDF-Home-Water-Filtration-Reduces-Sediment-and-Chlorine-WH-1000/326435031

        Home Depot product listing for Aquasana Rhino WH-1000 — confirms retail framing: 'independently tested to NSF/ANSI Standard 42 to remove up to 97% of chlorine and the Rhino tank is WQA certified to NSF/ANSI/CAN Standard 61.' Replicates the dual cert language across multiple retail channels

      9. Tier-1 journalismAccessed 2026-05-23
        https://waterfilterguru.com/best-under-sink-water-filter-reviews/

        Independent third-party (Water Filter Guru) hands-on lab testing of under-sink filter systems including the Claryum 3-Stage; comparative benchmarks vs iSpring, APEC, Clearly Filtered competitors at the same price tier

      10. Reddit threadAccessed 2026-05-23
        https://www.reddit.com/r/water/comments/xiohth/aquasana_whole_house_system_worthy_investment/

        r/water community feedback on Aquasana Rhino whole-house as a chlorine-and-feel improvement that does NOT replace softener / UV functionality — confirms the brand's marketing scope (chlorine + sediment + KDF) matches consumer-reported real-world results

      11. Reddit threadAccessed 2026-05-23
        https://www.reddit.com/r/WaterTreatment/comments/1cq5a4o/aquasana_reverse_osmosis_system_any_good/

        r/WaterTreatment community feedback on Aquasana under-sink RO long-term ownership (two years, no leak issues, subscription-driven replacement, slow flow rate caveat)

      12. Reddit threadAccessed 2026-05-23
        https://www.reddit.com/r/WaterTreatment/comments/1l11voa/whole_house_water_filtration_system_brand/

        r/WaterTreatment brand-recommendation thread placing Aquasana alongside Fleck, APEC, and Clack as legacy-brand picks worth shortlisting in the whole-house category — community validation of brand standing

      13. NSF listingAccessed 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=The+Brita+Products+Company

        Brita Elite (OB06) NSF International third-party listing — the apples-to-apples competitor cert reference for the Aquasana Claryum vs Brita Elite comparison

      14. NSF listingAccessed 2026-05-23
        https://info.nsf.org/Certified/DWTU/Listings.asp?CompanyName=iSpring

        iSpring Water Systems LLC NSF International listing for the RCC7AK Reverse Osmosis system under NSF/ANSI 58 — the apples-to-apples competitor cert reference for the Aquasana SmartFlow RO vs iSpring RCC7AK comparison

      TapWaterData is independent and not affiliated with NSF International, IAPMO, or WQA.

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