Proposed revision to NSF/ANSI 330 – Glossary of Drinking Water Treatment Unit Terminology. The proposed revision will add clarity and conformity to the definitions of soft water, hardness, and water softening.
06631: Approval of 330i11r2 - Water Definitions
Document (Archive)
2020-10-10
330i11r1 - Gleason Response Letter.pdf
Document
2020-09-24
330i11r1 - Regunathan Response Letter.pdf
DWTU 2020-11 - Water Definitions.pdf
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