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About This Item
Full Description
The purpose of this Standard is to establish minimum requirements for materials, design and construction, and performance of residential cation exchange water softeners. This Standard also specifies the minimum product literature that manufacturers shall supply to authorized representatives and owners, as well as the minimum service-related obligations that manufacturers shall extend to owners.
1.2 Scope
The manual, auto-initiated, and demand-initiated regeneration (DIR) residential cation exchange water softeners addressed by this Standard are designed 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 reduce hardness affecting the aesthetic quality of water. The established health hazards, barium and radium, are optional performance claims addressed by this Standard.
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. 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
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NSF/ANSI 44-2022
Residential Cation Exchange Water Softeners- Most Recent
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NSF/ANSI 44-2021
Residential Cation Exchange Water Softeners- Historical Version
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NSF/ANSI 44-2018
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Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2017
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2016
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2015
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2014
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2013
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2012
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2009
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2007
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2004
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2002e
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2002
Residential Cation Exchange Water Softeners- Historical Version
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NSF 44-2001
Residential Cation Exchange Water Softeners- Historical Version