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About This Item

 

Full Description

1.1 Purpose

It is the purpose of this Standard to establish minimum requirements for materials, design and construction, and performance of drinking water treatment systems that are designed to reduce specific aesthetic related (nonhealth effects) contaminants in public or private water supplies. This Standard also specifies the minimum product literature and labeling information that a manufacturer shall supply to authorized representatives and system owners as well as the minimum service related obligations that the manufacturer shall extend to system owners.

1.2 Scope

The point-of-use (POU) and point-of-entry (POE) systems addressed by this Standard are designed to be used for the reduction of specific substances that may be present in drinking water (public or private) considered to be microbiologically safe and of known quality. Systems covered under this Standard are intended to address one or more of the following: reduce substances affecting the aesthetic quality of the water, add chemicals for scale control, or limit microbial growth in the system (bacteriostatic).

Substances may be soluble or particulate in nature. It is recognized that a system may be effective in controlling one or more of these substances but is not required to control all. Systems with manufacturer claims that include components or functions covered under other NSF or NSF/ANSI Standards or Criteria shall conform to the applicable requirements therein. Filter systems covered by this Standard are not intended to be used with drinking water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
 

Document History

  1. NSF/ANSI 42-2022


    Drinking Water Treatment Units - Aesthetic Effects

    • Most Recent
  2. NSF/ANSI 42-2021


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  3. NSF/ANSI 42-2020


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  4. NSF/ANSI 42-2019


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  5. NSF 42-2018

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    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  6. NSF 42-2017


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  7. NSF 42-2016


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  8. NSF 42-2015


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  9. NSF 42-2014


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  10. NSF 42-2013


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  11. NSF 42-2012


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  12. NSF 42-2011


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  13. NSF 42-2010


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  14. NSF 42-2009


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  15. NSF 42-2007a


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  16. NSF 42-2007e


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  17. NSF 42-2007


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  18. NSF 42-2005e


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  19. NSF 42-2005


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  20. NSF 42-2002e


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  21. NSF 42-2002


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  22. NSF 42-2001


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version
  23. NSF 42-2000a


    Drinking Water Treatment Units - Aesthetic Effects

    • Historical Version