Proposed revisions to:
NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i133r1)
NSF/ANSI 44: Residential Cation Exchange Water Softeners (44i55r1)
NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i158r1)
NSF/ANSI 58: Reverse Osmosis Drinking Water Treatment Systems (58i110r1)
NSF/ANSI 62: Drinking Water Distillation Systems (62i48r1)
NSF/ANSI 244: Supplemental Microbiological Water Treatment Systems – Filtration (244i22r1)
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i37r1)
The proposed revisions clarify treatment train options (for NSF/ANSI 42, 44, 53, 58, 62, 244, and 401) as well as update normative language and correct standard-to-metric conversions (for NSF/ANSI 244 only).
Note that treatment train option updates are not included for NSF/ANSI 55 and 177, which do not have the applicable annex. |