Proposed revisions to:
NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i124r3)
NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i149r3)
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i30r3)
The proposed revisions add test protocols for pour through and batch treatment systems with influent reservoirs that hold more volume than the effluent reservoir, or that require multiple drain events to treat a single influent reservoir volume. Revision 2 addressed comments from the r1 ballot to add an example table, move the new language after the existing example table, and change the filling schedule maintenance period. Revision 3 now addresses comments from the r2 ballot concerning the filling schedule maintenance period. |
