What a certification mark actually certifies

Covers

Materials and components in contact with drinking water do not leach contaminants at levels that pose a health risk.

Does not cover

Treatment performance, contaminant reduction, mechanical safety, or any microbial claim.

Scope

The materials-safety standard most commonly cited where an accredited testing chain is required. WRAS and ACS are analogues rather than equivalents, and acceptance of a given scheme is decided per project and per authority — confirm before specifying.

Covers

UV disinfection system performance, graded Class A (disinfection of contaminated water) or Class B (supplemental treatment of water already deemed potable).

Does not cover

Any chemical or particulate reduction. It evaluates the system's own wetted materials, not the materials of the wider installation — that is NSF/ANSI 61.

Scope

The class matters more than the mark. Class B is not a microbiological barrier, so a specification that names NSF/ANSI 55 without naming the class leaves the duty ambiguous.

Not on the public catalog today — project-specified, available on request.

Covers

Cation-exchange softener performance — hardness reduction, rated salt efficiency, and the safety of materials in contact with the water.

Does not cover

Contaminant reduction beyond hardness, except the barium and radium claims a listing may name individually.

Scope

Scoped to residential cation-exchange softeners — a listing is not in-scope evidence for an industrial unit. Hardness is a scaling and process problem rather than a health one, so the mark says nothing about the potability of the water leaving it.

Covers

The manufacturer's declaration that a product conforms to the applicable EU directives — for this catalog usually machinery safety, or the low-voltage and EMC directives for powered equipment.

Does not cover

Drinking-water materials safety, treatment performance, or product quality.

Scope

CE is affixed on the manufacturer's own declaration of conformity, never as a third-party product listing. Some conformity routes do involve a notified body; most in this catalog do not. Ask for the Declaration of Conformity and read which directives it actually names.

Covers

The manufacturer's quality-management system — that documented processes exist and are externally audited.

Does not cover

Any property, performance or safety characteristic of the product itself.

Scope

A supplier can hold ISO 9001 and still ship equipment unsuited to your duty. Treat it as evidence about the organisation, never about the equipment.

Covers

Aesthetic effects — chlorine taste and odour, and particulate reduction at a stated reduction class.

Does not cover

Health-related contaminants; those fall under NSF/ANSI 53.

Scope

An aesthetic certification is routinely mistaken for a health claim. The two standards are tested separately, and a product may carry one without the other.

Not on the public catalog today — project-specified, available on request.

Covers

Health-effects contaminant reduction — lead, VOCs, cysts and similar — with each claim listed individually.

Does not cover

Any contaminant not named on the listing.

Scope

The listing enumerates specific contaminants at specific challenge levels. “Certified to NSF/ANSI 53” without the contaminant list is not a specification.

Not on the public catalog today — project-specified, available on request.

Covers

Point-of-use reverse-osmosis drinking-water system performance, including TDS reduction and any additional listed claims.

Does not cover

A bare membrane element outside the certified system, an industrial or commercial RO skid, and any contaminant not on the listing.

Scope

The certification attaches to a point-of-use system as configured. Substituting a membrane, housing or post-filter can take an assembly outside the listing it was bought for, and demanding a 58 listing of an industrial skid asks for a mark the standard does not cover. A membrane element can also be listed to 58 as a component for material requirements only — that listing says nothing about the element's own rejection or flow.

Covers

Lead content of the wetted surfaces of drinking-water system, component, and fitting materials, verified against the U.S. federal "lead-free" weighted-average threshold.

Does not cover

Contaminant reduction, treatment performance, or any materials-safety claim beyond lead content — that broader scope is NSF/ANSI 61.

Scope

A lead-content mark, not a general materials-safety mark. A listing under 372 does not substitute for 61 where the wider materials-safety standard is what's specified.

Not on the public catalog today — project-specified, available on request.

Covers

Safety of industrial control equipment and the panels built from it, and restriction of hazardous substances in electrical and electronic equipment.

Does not cover

Anything about the water — no materials safety, no treatment performance, no disinfection claim.

Scope

These marks sit beside water standards on a datasheet and are easily read as part of the same assurance. They address the panel, not the process.

Covers

Deutscher Verein des Gas- und Wasserfaches — the German gas-and-water industry association's approval scheme. For a UV disinfection system, that means the reactor's construction and disinfection performance tested against the German national requirements for that equipment class.

Does not cover

Performance or materials outside the tested equipment class, and it carries no automatic recognition outside Germany — a DVGW listing is not itself an NSF/ANSI or CE claim.

Scope

Confirm the certificate names the exact model variant. A family name does not extend a listing to every configuration sold under it — some variants in a range may carry no DVGW listing at all.

Covers

Schweizerischer Verein des Gas- und Wasserfaches — the Swiss analogue to DVGW, applied here to UV disinfection equipment tested against the Swiss national requirements for that equipment class.

Does not cover

Performance or materials outside the tested equipment class; a Swiss listing carries no automatic recognition outside Switzerland.

Scope

Confirm the certificate names the exact model variant. A family name does not extend a listing to every configuration sold under it — some variants in a range may carry no SVGW listing at all.

Covers

The US EPA's Ultraviolet Disinfection Guidance Manual — the design and dose-validation methodology for UV reactors used in drinking-water treatment that a manufacturer states its testing follows.

Does not cover

It is guidance, not a certifying body with its own registry. “UVDGM” on a datasheet is a claim of methodology alignment, not a listing number the way NSF/ANSI issues one.

Scope

Ask which validation report the claim rests on and which model it covers — UVDGM alignment stated for one variant is not evidence for a sibling variant.

Covers

Attestation de Conformité Sanitaire — the French national attestation that materials in contact with drinking water do not compromise its health safety, required for water-contact equipment sold into the French market.

Does not cover

Treatment or disinfection performance. Like NSF/ANSI 61 (whose entry above already names ACS as an analogue, never an equivalent), it addresses material contact safety, not log-reduction or throughput.

Scope

A national scheme recognised in France; it does not substitute for NSF/ANSI 61 where that is the specified requirement, and acceptance of a given scheme is decided per project and per authority.

Not on the public catalog today — project-specified, available on request.