Proposed revisions to NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i106), NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i124), NSF/ANSI 244: Drinking Water Treatment Units – Supplemental Microbiological Water Treatment Systems – Filtration (244i10), and
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i18).
The proposed revision will add an exemption for cyclic pressure testing for components downstream of the system on/off valve that are not subject to pressure under the off mode, and that either contain no media subject to plugging or are not designed to contain media. |
