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Mstormer OP t1_j9t8aal wrote on February 24, 2023 at 11:48 AM

Reply to comment by Quail-a-lot in Best Ongoing Water Filter solution in 2023 to NSF53 or higher standards by Mstormer

Is RO typically exempt from NSF/ANSI performance standards and testing like distillation because they remove everything, or do they still need to be rated? My understanding was that NSF58 was the standard RO need to meet to qualify as legitimately RO when independently tested.