Certifications & Standards (NSF/ANSI)NSF/ANSI 42/53/401/58 and how to verify claims.Explore topicsPitchersFaucet-MountUnder-SinkROWhole HouseFridge & IceShowerBasicsNSF/ANSIContaminantsMaintenanceTroubleshootingComparisonsToolsNSF/ANSI 401 Explained: Emerging Contaminants in Plain EnglishJanuary 6, 2026 · 14 min readLearn what NSF/ANSI 401 means, which emerging contaminants it covers, how it compares to NSF 42, 53, and 58, and how to read certifications for home water filters.NSF/ANSI 42 vs 53: Which One Matters for You?January 5, 2026 · 12 min readUnderstand the difference between NSF/ANSI 42 and 53 water filter standards, what each covers, and how to decide…
NSF/ANSI 401 Explained: Emerging Contaminants in Plain EnglishJanuary 6, 2026 · 14 min readLearn what NSF/ANSI 401 means, which emerging contaminants it covers, how it compares to NSF 42, 53, and 58, and how to read certifications for home water filters.
NSF/ANSI 42 vs 53: Which One Matters for You?January 5, 2026 · 12 min readUnderstand the difference between NSF/ANSI 42 and 53 water filter standards, what each covers, and how to decide…
