NSF Certification 372 vs. 53 – What Is The Main Difference?

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Applications of standard and testing is important when purchasing water filters and delivery systems. It is an objective means for consumers to validate a manufacturer’s product performance claim.

There are countless drinking water systems and filters in the market today, and getting the most efficient isn’t an easy task. However, conclusive product test results will support your ability to differentiate among them.

Product testing done by a reputable and independent third-party laboratory helps ensure unbiased test results.

In this post, we compare 2 certification ratings from NSF, a leader in testing for the water filtration industry, NSF 372 vs. 53.

NSF 372 vs 53 – What’s the difference?

FeatureNSF 372NSF 53
ScopePlumbing fixtures, fittings, and fixtures.Point of use (POU) and point of entry (POE) systems.
ClaimsEstablishes a limit on the of lead contained within water contact materials.Over 50 contaminants reduction claims. The most popular include lead, bacteria, VOCs, and chromium.
TestingMaterial safety, structural integrity, lead-free claim.Material safety, structural integrity, specific health-related contaminant reduction claim.

What is NSF Certification?

NSF (National Sanitation Foundation) is a non-profit organization originally founded in 1944. It is the leading global, independent third-party testing and certification organization for products affecting water quality and food safety.

Choosing a product that is NSF certified enables you to know that the product complies with all stringent public health standards.

From extensive product testing and material analysis to unannounced plant inspections, every detail of a product’s compliance is rigorously evaluated before it can get NSF certification.

The thorough certification process makes companies accountable in their manufacturing. If a product is certified, it gets the right to bear the NSF trademark.

What is NSF 53?

NSF 53 addresses point of use (POU) and point of entry (POE) systems designed to lower specific health-related contaminants in private or public drinking water.

Standard 53 establishes the minimum requirements for structural integrity, material safety, product literature, and contaminant reduction claims.

The most common technology addressed by this standard is carbon filtration. It includes both POE and POU products.

NSF tests and certifies under this standard if a filter system removes many specific contaminants from drinking water.

The contaminants can be microbiological, chemical, or particulate in nature.

By carefully going through the performance data sheet of a product, you’ll be able to tell whether it’s effective in reducing many impurities or just a few.

Is NSF 53 Important?

If a filter system is NSF 53 certified, it means that the system can remove a significant number of harmful contaminants from your drinking water.

Products certified under NSF 53 claim to reduce inorganics like fluoride, nitrates, and nitrite. They also remove heavy metals, including lead, arsenic, copper, cadmium, mercury, chromium, and selenium.

These systems also claim to eliminate volatile organic chemicals from drinking water.

What is NSF 372?

The NSF 372 standard addresses the amount of lead in any materials that come into contact with drinking water.

The standard is in response to section 1417 of SWDA (Safe Drinking Water Act), which prohibits the use of plumbing fixtures, fittings, solders, and fluxes that don’t meet the lead-free definition.

The act defines lead-free as – not containing more than 0.2% lead concerning solder and flux. It also means not more than a weighted average of 0.25% lead concerning the wetted surfaces of pipes, plumbing fittings, pipe fittings, and fixtures.

Although manufacturers are obligated to comply with SWDA, there’s no federal requirement to obtain the NSF 372 certification.

Is NSF 372 Important?

NSF 372 is very important as it helps meet public health and regulatory needs. It establishes procedures for determining lead content in drinking water system components.

NSF 372 applies to any drinking water system that dispenses or conveys water for human consumption.

In meeting the need, this standard helps certify organizations, regulatory agencies, utilities, and manufacturers to ensure that they provide assurances that comply with public health assurances.

NSF 372 may be used alongside other standards to minimize lead from drinking water.

What Does NSF/ANSI 53 Mean?

NSF/ANSI 53 is a standard that establishes minimum requirements for water systems designed to reduce specified health-related contaminants.

The standard offers over 50 contaminant reduction claims, including lead, bacteria, VOCs, and chromium.

Is Brita Filter NSF 53 Certified?

The Brita filter is NSF 42, 53, and 401 certified. In addition, it is certified to reduce 97% lead, chlorine, and over 60 other contaminants.

Is NSF the Same as ANSI?

The ANSI an American non-profit private organization. It serves as the official U.S representative to the ISO (International Organization for Standardization) via the U.S National Committee and the International Electrotechnical Commission.

It is also a member of the International Accreditation Forum.

ANSI provides the procedures and criteria for determining consensus on why standards matter for drinking water filters. In addition, it raises the bar for performance measurement and other requirements for the approval, maintenance, development, and coordination of American National Standards.

All accredited standards developers accept ANSI criteria and requirements as a condition for accreditation.

The National Sanitation Foundation (NSF), on the other hand, is an ANSI-accredited organization. It is devoted to public health safety and environmental protection(i).

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