NSF, as a neutral third party, has obtained approval and certification from 13 national or industry authoritative organizations, including the National Institute of Standards (ANSI), the Occupational Safety and Health Administration, and the Canadian National Standards Board, for its certification of US and international standards. NSF is the designated collaborating center of the World Health Organization (WHO) in the areas of food safety and drinking water safety and treatment. Products that have undergone NSF testing and meet NSF standards are authorized to use the NSF logo. Therefore, products that are authorized to bear the NSF logo indicate that the product has been confirmed in the following aspects:

1. It can achieve the ability to remove impurities as indicated in the product manual;

2. The materials that make up this product will not add polluting ingredients to the water during the water treatment process;

3. Comply with design and production process requirements;

4. The product does not have structural or functional defects;

5. The certification standards shown in the product's advertisements, sample materials, and labeling are true and accurate.