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Certification and Test Documentation

More Than a Product Claim: Evidence You Can Check

Certification standards and independent test reports help customers understand what a filtration product has actually been evaluated for. Instead of relying only on packaging, advertising, or marketplace descriptions, you can review the applicable standard, product model, tested claim, and supporting documentation.

Documentation Across Purewell Filtration Products Purewell filtration systems and replacement filters are supported by corresponding certification and/or test documentation. Customers can review system documents, filter documents, and performance reports through the Purewell Test Reports page.
Verifiable Evidence
42

NSF/ANSI 42

Drinking Water Treatment Units — Aesthetic Effects

What Does It Mean in Everyday Language?

This standard evaluates drinking-water treatment products for specified effects that influence the appearance, taste, smell, or everyday drinking experience of water.

Chlorine reduction, when listed
Taste and odor reduction, when listed
Particulate reduction, when listed
Materials, construction, and performance requirements
i
Certification Is Claim-Specific NSF/ANSI 42 does not automatically mean that a product reduces every contaminant. Check the certificate or listing for the exact model and certified reduction claims.
372

NSF/ANSI/CAN 372

Drinking Water System Components — Lead Content

What Does It Mean in Everyday Language?

This standard evaluates the lead content of materials and components that come into contact with drinking water, using defined calculations and verification procedures.

Evaluates wetted product components
Verifies applicable lead-content limits
Reviews materials used in the water pathway
Supports lead-content compliance verification
i
Lead Content Is Not Lead Reduction NSF/ANSI/CAN 372 evaluates lead content in product materials. It does not by itself certify that a filter removes lead already present in the source water.

From a Marketing Claim to Verifiable Evidence

Reliable documentation connects a standard to an identifiable product, a defined test scope, and a report or certificate that customers can review.

Identify the Standard Confirm whether the document refers to NSF/ANSI 42, NSF/ANSI/CAN 372, or another applicable standard.
Match the Product Check that the brand, product type, component, or model matches the item being sold.
Read the Test Scope Review exactly what was evaluated, including the reduction claim, material requirement, test condition, or performance category.
Review the Evidence Open the certificate, listing, or laboratory report instead of relying only on a badge or unsupported product description.
Product with Verifiable Documentation Claims can be checked against supporting evidence.
  • The applicable product or component can be identified.
  • The meaning and scope of the standard can be reviewed.
  • Specific performance claims can be checked against a report.
  • Customers can distinguish certification from general testing.
  • Material and performance claims have a documented basis.

Documentation does not mean every possible contaminant has been tested. It provides evidence for the specific scope shown in the applicable certificate or report.

Product Without Accessible Evidence Important claims may be difficult to confirm.
  • A standard logo may appear without a matching certificate.
  • The tested model may differ from the product being purchased.
  • Broad removal claims may exceed the actual test scope.
  • Lead-content compliance may be unclear or undocumented.
  • Customers may be unable to verify the source or date of a report.

An unavailable report does not automatically prove that a product is unsafe. However, it prevents customers from independently confirming the advertised certification and performance claims.

Documentation Available from Purewell

Purewell organizes supporting documents by system, filter, standard, and filtration performance so customers can review the evidence relevant to their product.

Filter System Documents Certification or test documentation associated with applicable complete filtration-system components.
Replacement Filter Documents Supporting documentation associated with applicable Purewell replacement filters and filter elements.
Performance Test Reports Laboratory reports covering specified filtration-performance categories under defined test conditions.
Customer-Accessible Files Downloadable documents provide more transparency than a badge, short claim, or marketplace product description alone.

Important Certification Notes

Reading the standard correctly is as important as seeing the certification or test badge.

01
Check the Exact Product or Component Certification and test results should be matched to the applicable product, filter, component, model, or documented product family.
02
Check the Exact Certified Claim A product certified under NSF/ANSI 42 may support only the reduction claims specifically shown in its certificate or listing.
03
372 Does Not Mean Lead Removal NSF/ANSI/CAN 372 concerns lead content in wetted materials. Lead reduction from source water requires a separate applicable filtration-performance claim.
04
Certification and Testing Are Different A certification, a component certification, and an independent laboratory test report are different forms of evidence and should be described accurately.
05
Review Test Conditions Results may depend on source-water conditions, flow rate, capacity, product setup, test protocol, and filter condition.
06
Replace Filters as Directed Certification or testing does not make a filter permanent. Follow the applicable installation, flushing, use, and replacement instructions.

Review the Documents Before You Choose

View Purewell system documents, replacement-filter documents, and filtration-performance reports. Select the files that correspond to the product and performance claim you want to verify.

View Test Reports

Certification and test coverage may vary by product, component, model, configuration, and claim. Always review the applicable certificate, listing, product specification, and test report. References to NSF/ANSI 42 or NSF/ANSI/CAN 372 should not be interpreted as certification for contaminants or performance categories that are not specifically included in the supporting documentation.

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