Proposed revisions to:
NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i123r1)
NSF/ANSI 44: Residential Cation Exchange Water Softeners (44i50r1)
NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i147r1)
NSF/ANSI 55: Ultraviolet Microbiological Water Treatment Systems (55i64r1)
NSF/ANSI 58: Reverse Osmosis Drinking Water Treatment Systems (58i102r1)
NSF/ANSI 62: Drinking Water Distillation Systems (62i45r1)
NSF/ANSI 244: Supplemental Microbiological Water Treatment Systems – Filtration (244i21r1)
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i29r1).
The proposed revisions will add NSF/ANSI 372 as prerequisite to the above NSF/ANSI DWTU standards. |
