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NSF Awards Drinking Water Treatment Unit Certification to Kohler Water Filter Systems

The Kohler kitchen water filtration systems Carafe® series has been tested and certified by NSF to the requirements of NSF/ANSI 58 to effectively reduce TDS in drinking water

Several Kohler Carafe® water filter systems are the first products to earn NSF certification to NSF/ANSI 58. On June 5, Mr. David Purkiss, on behalf of global public health organization NSF, presented the NSF certification at Kohler (China) Investment Co., Ltd.’s new products launch ceremony in Shanghai. NSF certification verifies that the Kohler kitchen water filtration system has been tested and certified by NSF against the total dissolved solids (TDS) reduction requirements detailed in NSF/ANSI 58: Reverse Osmosis Drinking Water Systems, an American National Standard for drinking water treatment units. The first products to earn certification to NSF/ANSI 58 are the Kohler kitchen water filtration systems Carafe® series, models KP040, KP050, RO400-A,RO400-C, RO400-D, RO400-E, RO40-L and RO400-X.

This event was held during Kitchen & Bath China 2018, one of the largest events in Shanghai focusing on the kitchen and bath segment. The conference was attended by dozens of industry manufacturers, experts and media.

“In order to get NSF certification, Kohler has passed a stringent review, including strict testing to the relevant recognized standards, unannounced inspection at the manufacturing facility and periodic re-testing to verify our continuous compliance with NSF certification requirements,” said Mr. Ted Chen, Managing Director of the Purification Division at Kohler China. “Both Kohler and NSF have done a lot of work during the certification process, which provides consumers confidence in the quality and safety of their drinking water. This is what makes the stringent and lengthy process of testing and certification worthwhile.”

“NSF continues to protect and improve public health by certifying products worldwide that help improve the quality of drinking water,” said David Purkiss, Vice President of Water Systems at NSF. “NSF’s certification to NSF/ANSI 58 means consumers now have a verified solution to reduce total dissolved solids (TDS) in their drinking water.”

To earn NSF certification, water treatment systems, including water filters, must undergo extensive testing to confirm that they meet the strict material safety and structural requirements of NSF/ANSI 58, an American National Standard for drinking water treatment units. In addition to verifying that the system is structurally sound, NSF verifies that:

  • The contaminant reduction claims, such as TDS reduction, shown on the label are true.
  • The system does not add anything harmful to the water.
  • The product labeling, advertising and literature are not misleading.

Certified products must be retested periodically and manufacturing facilities must be inspected every year, which ensures products continue to meet all requirements.

For more information about NSF/ANSI 58: Reverse Osmosis Drinking Water Treatment Systems, please contact NSF in China at or +86 400.821.0702, or visit

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