Proposed revision to NSF/ANSI 330 – Glossary of Drinking Water Treatment Unit Terminology (330i11r1) The proposed revision will add clarity and conformity to the definitions of soft water, hardness, and water softening.
06487: Approval of 330i11r1 - Water Definitions
Document (Archive)
2020-10-23
DWTU 2020-11 - Water Definitions.pdf
Document
2020-06-25
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