Additional DOWEX™ Resins Regulatory Information

NSF / ANSI Standards 61

NSF / ANSI Standard 61, adopted on October 7, 1988, covers indirect additives products and materials, including process media, protective materials, joining and sealing materials, pipes and related products, mechanical devices, and mechanical plumbing devices (including faucets). In essence, every material from the well or water intakes through to the faucet are covered. NSF / ANSI Standard 61 addresses crucial aspects of drinking water system components: whether contaminants that leach or migrate from the product / material into the drinking water are above acceptable levels in finished waters. Standard 61 also requires evaluation of certain materials that have potential to support microbiological growth. Such materials include solvent-based coatings, gaskets, etc. The standard also covers products, components and materials. When a material is certified under Standard 61, its certification indicates use restrictions on parameters such as maximum use temperature or surface area to volume ratio when the material is used in a finished product. This option allows manufacturers using certified materials to bypass some or all chemical and microbiological testing when seeking certification, and assures that finished products meet all requirements.

For the Dow ion exchange resins and adsorbents that meet NSF / ANSI Standard 61, see this list.

NSF / ANSI Standard 44 establishes minimum requirements for the certification of residential cation exchange water softeners. The scope of Standard 44 includes material safety, structural integrity, accuracy of the brine system, product literature, and the reduction of hardness and the reduction of specific contaminants from a known quality water source. The most popular claims made under standard 44 are barium reduction, radium 226 / 288 reduction, and softener performance.

For the Dow ion exchange resins and adsorbents that meet NSF / ANSI Standard 44, see this list.