Proposed revision to three standards:
NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i109r3)
NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i130r3)
NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i22r3)
The proposed revision will harmonize the current operational cycles and sampling specified in NSF/ANSI 42, 53, and 401. Revision 2 addressed comments received during the r1 ballot (11/30/20) to specify a minimum run time per day and clarify the language for the rest time. Revision 3 addresses additional comments received from a straw ballot of r2 (6/16/21). This revision adds an exemption for holidays and weekends, specifies the collection time after 1 hour instead of the 3rd cycle for rests longer than 2 hours, and allows an operational cycle of up to 10%-on / 90%-off for POU devices. |
