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Omnipure Water Filters

Omnipure is a specialty REPLACEMENT-cartridge maker (not a consumer end-system brand) with 218 NSF listings; its ELF 1MPF and Q5515 PF are rare under-sink cartridges with explicit NSF/ANSI 53 PFOA + PFOS claims.

Best for

  • Custom under-sink builders selecting NSF-listed cartridges for a 1/4-inch quick-connect housing
  • Water-dispenser / cooler makers OEM-sourcing certified cartridges (ELF, K2, Q-series)
  • Buyers replacing the cartridge inside an Avalon, Vitapur, Glacier Bay, or similar water cooler
  • Specialty applications needing certified PFOA/PFOS reduction in a small-format cartridge

Not recommended for

  • Consumers buying a complete water-filtration system (Omnipure sells cartridges, not systems)
  • Households needing reverse osmosis (Omnipure has no NSF/ANSI 58 listings)
  • Buyers wanting retail availability — Omnipure is mostly OEM / specialty-distributor channels
Mid tier — typically $200–$500
  • Certs:NSF/ANSI 42, 53, 401
  • 164 SKUs
  • $100–$300
  • Parent:Marmon Water (a Berkshire Hathaway company)

Certification Reality: What's Actually Tested

This table shows the NSF/IAPMO/WQA-listed certifications for each Omnipure 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.

CARB10

Omnipure CARB10 (10-inch carbon-block cartridge)

Standards held

NSF/ANSI 42

What’s certified

  • Chlorine
  • Taste and odor

Brand claims but NOT certified

  • Lead
  • PFAS
  • Cysts

NSF listing

View NSF listing

ELF-1MPF

Omnipure ELF 1MPF (extended-life carbon-block, NSF/ANSI 53)

Standards held

NSF/ANSI 42, 53

What’s certified

  • Chlorine
  • Taste and odor
  • Cysts
  • PFOA
  • PFOS

Brand claims but NOT certified

  • Mercury
  • Asbestos
  • VOCs

The ELF 1MPF is one of only two Omnipure SKUs (alongside Q5515 PF) with explicit NSF/ANSI 53 PFOA + PFOS reduction. This is rare for an in-line cartridge format — most under-sink cartridges with PFAS claims are full-size 10-inch+ systems. The ELF 1MPF makes certified PFAS coverage viable in tight-space installs.

NSF listing

View NSF listing

Q5515-PF

Omnipure Q5515 PF (NSF/ANSI 53 lead + cyst + PFAS cartridge)

Standards held

NSF/ANSI 42, 53

What’s certified

  • Chlorine
  • Taste and odor
  • Lead
  • Cysts
  • PFOA
  • PFOS

Brand claims but NOT certified

  • Mercury
  • VOCs
  • Atrazine

NSF listing

View NSF listing

E5520

Omnipure E5520 (NSF/ANSI 401 microplastics cartridge)

Standards held

NSF/ANSI 42, 401

What’s certified

  • Chlorine
  • Taste and odor
  • Microplastics

Brand claims but NOT certified

  • BPA
  • Pharmaceutical surrogates
  • PFOA
  • PFOS

NSF listing

View NSF listing

CL10-Aquabond

Omnipure CL10 Aquabond (10-inch carbon-block with chloramine reduction)

Standards held

NSF/ANSI 42

What’s certified

  • Chlorine
  • Taste and odor

Brand claims but NOT certified

  • Lead
  • Cysts
  • Chloramine (explicit NSF claim)

NSF listing

View NSF listing

Check Certification for a Omnipure Filter

This widget shows the third-party-listed certifications for Omnipure 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.

Listings as of May 29, 2026.

About Omnipure

Omnipure Filter Co. is a Caldwell, Idaho specialty manufacturer of in-line plumbed-in water-filter cartridges. Unlike most consumer brands, Omnipure does NOT sell complete end-systems — the catalog is replacement cartridges (sizes ranging from 6 inches to 12 inches, with 1/4-inch quick-connect or threaded fittings) that sit inside other-brand water dispensers, coolers, refrigerator filtration loops, espresso equipment, and custom under-sink builds. The company holds 218 NSF listings (146 NSF/ANSI 42, 45 NSF/ANSI 53, 27 NSF/ANSI 401). Notable: Omnipure's ELF 1MPF and Q5515 PF cartridges are among the few small-format NSF/ANSI 53 cartridges with explicit PFOA + PFOS reduction claims, making them a go-to OEM choice for downstream consumer brands that want certified PFAS coverage in compact installations. Omnipure was acquired by Marmon Holdings (a Berkshire Hathaway subsidiary) in 2007.

Founded:1970
Headquarters:Caldwell, Idaho, USA
Parent company:Marmon Water (a Berkshire Hathaway company)

Ownership history

  1. 1970

    Founded as Omnipure Filter Co. in Caldwell, Idaho, focused on in-line plumbed-in replacement cartridges for OEM and aftermarket use.

  2. 2007

    Acquired by Marmon Holdings (Berkshire Hathaway-owned conglomerate); integrated into Marmon's water-treatment division.

CARB / CL series (carbon block)

Activated-carbon-block cartridges (CARB6, CARB10, CL10 Aquabond) for chlorine + taste & odor reduction. NSF/ANSI 42 certified. The workhorse OEM line.

K2 / K5 series (granular activated carbon)

Granular carbon cartridges with NSF/ANSI 42 certification; commonly OEM-supplied for water dispensers and cooler systems.

ELF series (broad-claim NSF/ANSI 53)

Higher-grade carbon-block cartridges including the ELF 1MPF — one of two Omnipure SKUs with explicit NSF/ANSI 53 PFOA + PFOS reduction claims.

Q-series (NSF/ANSI 53 lead + cyst + PFAS)

The Q5515 PF and related NSF/ANSI 53-listed cartridges with explicit Lead + Cyst + PFOA + PFOS reduction claims. The premium-feature line.

E-series (NSF/ANSI 401)

E5520, E5620 cartridges with NSF/ANSI 401 microplastics reduction listings.

Omnipure manufactures cartridges at its Caldwell, Idaho facility (1904 Industrial Way, Caldwell, ID 83605 — the NSF address of record on all 218 listings). The company operates as a vertically-integrated cartridge producer: carbon-block extrusion, GAC packing, housing assembly, and QA are performed in-house in Idaho. Sub-component sourcing (e.g., carbon raw material, plastic housings) involves a mix of US and imported suppliers; Omnipure does not publish a per-SKU country-of-origin breakdown.

Omnipure Water Filter Collection (3)

Affiliate Disclosure: We earn affiliate commissions from purchases made through our links at no extra cost to you. This supports our testing and keeps our content free. Learn More

BEST HIGH TDS WATER
CL10RO T/33[2]

Omnipure Filter Co.

CL10RO T/33[2]

(419 reviews)
13.56

NSF Certified:

NSF-42

Capacity

1500 gal

Filter Life

5 mo

Flow Rate

0.5 gpm

Removes 3 contaminants:

Chlorine (Free), Chlorine (Total), Chlorine Dioxide

View Details
BEST HIGH TDS WATER
K2586[4]

Omnipure Filter Co.

K2586[4]

(12 reviews)
18.67

NSF Certified:

NSF-42

Capacity

1250 gal

Filter Life

4 mo

Flow Rate

0.5 gpm

Removes 3 contaminants:

Chlorine (Free), Chlorine (Total), Chlorine Dioxide

View Details
BEST HIGH TDS WATER
CL10RO T/28[2]

Omnipure Filter Co.

CL10RO T/28[2]

(4 reviews)
32.99

NSF Certified:

NSF-42

Capacity

1500 gal

Filter Life

5 mo

Flow Rate

0.5 gpm

Removes 3 contaminants:

Chlorine (Free), Chlorine (Total), Chlorine Dioxide

View Details

Which Omnipure Filter Is Right for You?

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

Lead
Best pick: Omnipure Q5515 PF (NSF/ANSI 53 lead + cyst + PFAS cartridge) — certified for Lead (Omnipure).
PFAS
Best pick: Omnipure Q5515 PF (NSF/ANSI 53 lead + cyst + PFAS cartridge) — certified for PFAS (Omnipure).
Fluoride
Not the right choice if Fluoride is your priority — no certified Omnipure SKU for Fluoride. Consider an NSF/ANSI 53-listed filter.
Arsenic
Not the right choice if Arsenic is your priority — no certified Omnipure SKU for Arsenic. Consider an NSF/ANSI 53-listed filter.
Nitrate
Not the right choice if Nitrate is your priority — no certified Omnipure SKU for Nitrate. Consider an NSF/ANSI 53-listed filter.
Chromium-6
Not the right choice if Chromium-6 is your priority — no certified Omnipure SKU for Chromium-6. Consider an NSF/ANSI 53-listed filter.
Mercury
Not the right choice if Mercury is your priority — no certified Omnipure SKU for Mercury. Consider an NSF/ANSI 53-listed filter.
Atrazine
Not the right choice if Atrazine is your priority — no certified Omnipure SKU for Atrazine. Consider an NSF/ANSI 53-listed filter.
Chloroform
Not the right choice if Chloroform is your priority — no certified Omnipure SKU for Chloroform. Consider an NSF/ANSI 53-listed filter.
Cysts
Best pick: Omnipure Q5515 PF (NSF/ANSI 53 lead + cyst + PFAS cartridge) — certified for Cysts (Omnipure).

How Omnipure Compares

Omnipure ELF 1MPF vs Aquasana AQ-5300 Replacement

Format

Omnipure ELF 1MPF

10-inch inline cartridge

Aquasana AQ-5300 Replacement

Proprietary under-sink replacement

MSRP (per cartridge)

Omnipure ELF 1MPF

~$45

Aquasana AQ-5300 Replacement

~$70

NSF/ANSI 42 (chlorine)

Omnipure ELF 1MPF

Yes

Aquasana AQ-5300 Replacement

Yes

NSF/ANSI 53 — PFOA + PFOS

Omnipure ELF 1MPF

Yes (explicit listing)

Aquasana AQ-5300 Replacement

No (PFAS marketed but not on NSF-53 listing)

NSF/ANSI 53 — Lead

Omnipure ELF 1MPF

No (ELF; lead on Q5515 PF)

Aquasana AQ-5300 Replacement

Yes

NSF/ANSI 53 — Cyst

Omnipure ELF 1MPF

Yes

Aquasana AQ-5300 Replacement

Yes

Best for

Omnipure ELF 1MPF

Custom builds + OEM dispensers wanting certified PFAS

Aquasana AQ-5300 Replacement

Aquasana AQ-5300 system owners — proprietary fit only

Different products with different buyer journeys. The Omnipure ELF 1MPF is an OEM cartridge with explicit NSF/ANSI 53 PFOA + PFOS coverage but no Lead claim — buyers needing both PFAS and Lead pair it with another cartridge or step up to the Q5515 PF. Aquasana's AQ-5300 cartridge covers Lead but doesn't carry NSF/ANSI 53 PFAS-specific claims despite the brand's PFAS marketing. Choose Omnipure for certified-PFAS compact OEM use; Aquasana for an integrated retail under-sink system.

Sources for facts in this comparison

  1. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    Omnipure ELF 1MPF NSF/ANSI 53 PFOA + PFOS listing · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  2. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    Aquasana / A.O. Smith NSF/ANSI 53 listed scope · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

Omnipure Q5515 PF vs Solventum Aqua-Pure 3MDW301

Format

Omnipure Q5515 PF

10-inch inline cartridge (OEM)

Solventum Aqua-Pure 3MDW301

Residential under-sink system

MSRP

Omnipure Q5515 PF

~$50 (cartridge only)

Solventum Aqua-Pure 3MDW301

~$380 (system)

NSF/ANSI 53 — Lead + Cyst

Omnipure Q5515 PF

Yes

Solventum Aqua-Pure 3MDW301

Yes

NSF/ANSI 53 — PFOA + PFOS

Omnipure Q5515 PF

Yes (explicit listing)

Solventum Aqua-Pure 3MDW301

No (NSF/ANSI 401 surrogate set instead)

NSF/ANSI 401 (BPA, ibuprofen, microplastics)

Omnipure Q5515 PF

No

Solventum Aqua-Pure 3MDW301

Yes

Buyer fit

Omnipure Q5515 PF

OEM / specialty / custom-builds

Solventum Aqua-Pure 3MDW301

Consumer retail under-sink

Different product categories. Q5515 PF is a single cartridge for OEM / custom installs with explicit NSF/ANSI 53 PFAS coverage; 3MDW301 is a full retail system with broader NSF/ANSI 401 emerging-contaminant scope but NO explicit PFOA + PFOS NSF/ANSI 53 listing. Buyers who specifically want certified PFAS reduction should pick the Q5515 PF; buyers who want broad pharmaceutical-residue coverage pick the Aqua-Pure.

Sources for facts in this comparison

  1. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    Q5515 PF NSF/ANSI 53 listed claim scope · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  2. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp

    Solventum 3MDW301 NSF certification scope · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

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

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

What Reddit Says About Omnipure

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/waterfiltersPositive
“Replaced the GAC cartridge in our point-of-use cooler with an Omnipure ELF 1MPF specifically for the NSF/ANSI 53 PFAS listing. Hard to find that certification on an inline cartridge at this size.”
View thread
r/CoffeePositive
“Omnipure K2548 sits behind our 3-group espresso machine; flow rate held for 18 months before TDS started creeping. Cartridge changes are 5 minutes flat.”
View thread
r/HomeImprovementMixed
“My Avalon water cooler uses Omnipure K-series cartridges. Avalon charges $30 for branded replacements; the exact same Omnipure OEM part on omnipure.com is $14.”
View thread

Quotes verified on 2026-05-20.

Omnipure Customer Reviews Summary

5,000Total Reviews
4.5
Average

What Customers Love

  • Direct-source pricing is 2-3x cheaper than rebranded cartridges from cooler manufacturers
  • Predictable flow characteristics and service-cycle gallons; specs are honest
  • NSF/ANSI 53 PFAS coverage on the ELF and Q-series is a rare feature in this cartridge format
  • Compatible with the broad consumer water-cooler / dispenser install base

Common Concerns

  • No complete-system options — buyers wanting an integrated under-sink need to source housing + fittings separately
  • Cartridge-matching for non-technical buyers requires reading NSF listings + measuring fittings
  • Retail channel availability narrower than competitor brands (mostly specialty distributors + omnipure.com)
  • Documentation skews toward OEM integrators rather than DIY consumers

Omnipure does not have a strong direct-to-consumer review base because the brand sells primarily through OEM and specialty-distributor channels rather than retail.

Consumer reviews concentrate on the cartridge-replacement category for water coolers (Avalon, Vitapur compatibility) where Omnipure's OEM part is identified after-the-fact.

Specialty-build / espresso / custom-RO buyer reviews consistently cite Omnipure as a reliable cartridge brand with predictable flow characteristics and clear NSF listings.

Sources for Omnipure review data

  1. Amazon reviewaccessed: 2026-05-20
    https://www.amazon.com/dp/B0BNYWGN5J

    Omnipure K-series Amazon review aggregate

  2. Brand officialaccessed: 2026-05-20
    https://omnipure.com/

    Omnipure publishes its catalog and cartridge specifications directly; reviews live in the OEM / specialty distributor channel

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

About Omnipure Marketing Language

Some claims on Omnipure 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.

Omnipure is a cartridge-only manufacturer — they don't sell complete systems. The 'water cooler brand' you bought is probably running Omnipure cartridges inside.

Most consumers encounter Omnipure indirectly. Avalon, Vitapur, Glacier Bay, Brio, and many other consumer water-cooler and dispenser brands OEM-source Omnipure cartridges. Avalon and Brio resell branded versions of Omnipure cartridges (often K-series for the bottom-load coolers) at 2-3x the per-cartridge cost. Buyers who match part numbers can frequently purchase the identical NSF-listed Omnipure cartridge direct for less. Omnipure also supplies cartridges to custom under-sink builds, specialty residential RO systems, and small-format ice/beverage equipment. Two SKUs (ELF 1MPF and Q5515 PF) hold the rare NSF/ANSI 53 PFOA + PFOS reduction listing — a feature consumer water-cooler brands almost never call out even when the embedded Omnipure cartridge has it.

Sources

  1. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp

    Omnipure's 218 NSF listings are cartridge-format products, not end-systems · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  2. NSF listingaccessed: 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    ELF 1MPF and Q5515 PF NSF/ANSI 53 listings include explicit PFOA + PFOS reduction · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  3. Brand officialaccessed: 2026-05-20
    https://omnipure.com/

    Omnipure supplies cartridges to consumer water-cooler / dispenser / under-sink OEMs

Verified 2026-05-20.

Frequently Asked Questions About Omnipure Water Filters

Yes — Omnipure Filter Co. holds 218 NSF listings: 146 NSF/ANSI 42 (chlorine, taste & odor, particulates), 45 NSF/ANSI 53 (lead, cysts, and on the ELF 1MPF + Q5515 PF SKUs: explicit PFOA + PFOS reduction), and 27 NSF/ANSI 401 (microplastics). Omnipure has 0 NSF/ANSI 58 listings — they do not manufacture reverse-osmosis systems. You can search Omnipure on the NSF database for the live per-SKU list. Before sourcing a cartridge, check your water quality by ZIP code so you target the right certified claim set.

Sources: [1]

How We Researched Omnipure

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: 2026-05-20 · Next scheduled review: 2027-05-20

All sources (7)

  1. NSF listingAccessed 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp

    All 218 Omnipure NSF listings across NSF/ANSI 42, 53, 401 · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  2. NSF listingAccessed 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    ELF 1MPF and Q5515 PF explicit PFOA + PFOS NSF/ANSI 53 reduction listings · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

  3. Brand officialAccessed 2026-05-20
    https://omnipure.com/

    Omnipure product catalog, cartridge form factors, fitting specifications, OEM/aftermarket positioning

  4. Brand officialAccessed 2026-05-20
    https://omnipure.com/about/

    1970 founding, Caldwell ID manufacturing, vertically-integrated production

  5. Brand officialAccessed 2026-05-20
    https://www.marmon.com/businesses/water

    Marmon Water subsidiary lists Omnipure among its water-treatment portfolio companies

  6. SEC filingAccessed 2026-05-20
    https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001067983&type=10-K

    Berkshire Hathaway 10-K describes Marmon Holdings ownership and water-treatment operations

  7. NSF listingAccessed 2026-05-23
    https://info.nsf.org/Certified/dwtu/Listings.asp?Standard=053

    Comparison facts: Aquasana AQ-5300 NSF/ANSI 53 listed scope · URL rewritten 2026-05-23: NSF Company= filter broken for our brand names; widened to non-Company-scoped variant per bug-fix plan

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

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