Proposed revisions to:
NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i124r1)
NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i149r1)
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i30r1)
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. |