Express Water RO5DX: NSF certification check
Certified to: NSF/ANSI 58 (per NSF's public listing, checked 2026-10-17).
| Type | Reverse osmosis system |
|---|---|
| Replacement element(s) on NSF listing | FLTMEME50 module (per NSF listing) |
| Daily production rate (NSF/ANSI 58 listing) | 12.22 gallons/day |
| Replacement filter price | $34.99: "RO System Filter Set", listed as "starting at" (source, as listed 2026-10-17) |
| NSF listings | NSF/ANSI 58 |
Exactly what NSF lists
NSF/ANSI 58: Reverse osmosis systems: TDS plus optional health claims
Certified claims on NSF's listing: TDS Reduction.
Important: NSF's listing for this system shows only TDS reduction under NSF/ANSI 58. Marketing may mention lead, fluoride or PFAS, but those claims are not on the NSF listing we checked. If the manufacturer says it is "tested to" other standards, that is a different (and weaker) statement than NSF certification.
Contaminant pages featuring this model
View Express Water RO5DX on the manufacturer's site (plain link, not an affiliate link)
We have not tested this product. Certification means NSF verified specific claims under specific test conditions; it does not mean your water will be safe. Get your water tested and see the methodology.