NSF/ANSI 44:2022
Current
The latest, up-to-date edition.
Residential Cation Exchange Water Softeners
Hardcopy , PDF
English
01-05-2023
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.
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