Country-Specific Certifications of Drinking Water Products by GMORS

Technical Papers

Products, equipment and components that come into contact with drinking water have to be evaluated to ensure that adverse health effects do not result from the leaching of hazardous substances and contaminants into the drinking water supply and distribution system.

Country-specific certification includes NSF for the United States, WRAS for the United Kingdom, Germany UBA (KTW), the Netherlands KIWA, France ACS, and Australia AS/NZS.

GMORS offers elastomeric sealing products like o-rings, seals and gaskets, diaphragms and custom molded parts which complies with the above standards.

NSF   WRAS   ACS   DVGW   UBA(KTW)


Country-Specific Approval


NSF develops the standards for testing, and offers services which includes the testing itself, certification, inspection and auditing as well as consulting and training services.
NSF-61 measures the amount of lead and other heavy metals and organic materials that are released into the water when the product is used. NSF-61 material certification related to sanitary and potable water industry includes:
1) Section 6: Joining and Sealing Materials: This includes O-rings, gaskets and various custom molded parts in materials such as EPDM, Silicone, NBR and more.
2) Section 9: Mechanical Plumbing Devices: Mechanical piping: faucets, showers, sprayers, water coolers, flexible pipe joints for residential use, hot and cold water exchangers and so on.


WRAS is the acronym for Water Regulations Advisory Scheme, and it is a certification of compliance in accordance with British Standards BS6920 that relates to the protection of public health in the prevention of water contamination by products or materials that comes into contact with drinking water. Its scope of tests includes all materials that are in contact with water, such as plumbing pipes, faucets, valve parts, rubber products, plastics and so on, and materials that may be used to manufacture related equipment. WRAS is the standard applicable in the United Kingdom, the Commonwealth and South East Asian Countries.


ACS (Attestation De Conformité Sanitaire) Certification is a requirement in France that evaluates the use of products, parts and materials that comes into contact with drinking water. It is mainly based on the standards issued by AFNOR (Association Francaise de Normalisation) for the testing of plumbing related products. All products that comes into contact with drinking water has to acquire ACS Certification in France prior to legal sales.


DVGW (Deutscher Verein des Gas- und Wasserfaches) is the largest certification body for the water and gas industry in Europe. Product manufacturers acquire a DVGW CERT certificate to demonstrate product compliance, and DVGW W-270 of the standard relates specifically to the approval of material for drinking water applications. Products and materials are evaluated on the basis of chemical substance migration and microorganism growth.

UBA (Umweltbundesamt) German Environment Agency is the authority for drinking water material certification and establishes the health safety standards in the regulation of products that comes into contact with drinking water. The KTW (Kunststoffe und Trinkwasser) Certification relates to the assessment of material used in the production, distribution and storage of drinking water to determine level of contamination. DVGW-approved laboratories provide migration testing at specified temperatures. KTW Certification is also widely recognized in Europe and around the world.

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GMORS is a leading developer of materials for elastomeric sealing applications, and offers products like o-rings, seals, gaskets and custom molded rubber components that comply with all major certifying authorities such as NSF, WRAS, ACS, UBA (KTW), W-270 and Australia AS / NZS4020.


NSF Certification

NSF Section 6 certified products offered by GMORS include N7041AA, E7041AA, E7042AA, E7051AA, S7031AB. In particular, N7041AA (NBR70, sulfur cured), E7051AA (EPDM70, sulfur cured) and E7041AA (EPDM70, peroxy cured), are materials that are suitable for use in dynamic applications.

S7031AB (silicone70, peroxide cured) has excellent heat resistance and is generally regarded as non-toxic to humans. Silicone seals are suitable for use with water filtration systems, water dispensers as well as for sealing use in showerheads.

E7042AA (EPDM70, peroxide cured) features low compression set and good anti-chloramine resistance. It is suitable for use in swimming pool disinfection systems, and has also been evaluated for use in mechanical plumbing applications with a maximum surface area to volume ratio of 2.0 sq. inch/L.  It is worth mentioning that the E7041AA has achieved the highest material safety standards under Section 9 of NSF-61 for the exclusion of harmful levels of contaminants leached from “end-point” plumbing devices. “End-point” devices include drinking water fountains, stop valves and kitchen faucets.



WRAS Certification

WRAS Certification can be divided into materials and components. GMORS is WRAS certified for the following compounds under the respective section subtitles:

E7053AA. Black coloured, compression moulded EPDM rubber `O`-Ring. Shore hardness 70. For use with water up to 85°C.
Section Subtitle: Ethylene Propylene Diene Monomer (EPDM) - components.

N7018AA. Black coloured, compression moulded NBR rubber material. Shore hardness 72. For use with water up to 85°C.
Section Subtitle: Nitrile (Acrylonitrile Butadiene) material only.

E8083AA. Black coloured, compression moulded EPDM rubber material. Shore hardness 80. For use with water up to 85°C.
Section Subtitle: Ethylene Propylene Diene Monomer (EPDM) - material only.

E7083AA. Black coloured, compression moulded EPDM material. Shore hardness 72. For use with water up to 85°C.
Section Subtitle: Ethylene Propylene Diene Monomer (EPDM) - material only.

E9053AA. Black coloured, compression moulded EPDM rubber `O`-Ring. Shore hardness 90. For use with water up to 85°C.
Section Subtitle: Ethylene Propylene Diene Monomer (EPDM) - components.

E6083AA. Black coloured, compression moulded EPDM material. Shore hardness 60. For use with water up to 85°C.
Section Subtitle: Ethylene Propylene Diene Monomer (EPDM) - material only.






The following is a comparison of the drinking-water-certified item number and performance and characteristics. If you need more details, please contact us and our technical specialists will get in touch with you. If there are specific application requirements, we are also happy to provide you with the relevant technical information and material recommendations.

Compound

Service temp range, °C
Hardness range, Shore A
Tensile strength, psi
Elongation, %

 Compression set, %

E7041AA
EPDM Peroxide Cured

-55~150°C 70±5
2323 230

10.7
22hrs @125 °C

NSF61 Gasket/Sealing Materials and O-Rings
Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L;
Section 9-Mechanical Plumbing Devices: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L

E7042AA
EPDM Peroxide Cured

-55~150°C 70±5 2311 174

8.5
22hrs @150  °C

NSF61 Gasket/Sealing Materials and O-Rings
Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L
Section 9-Mechanical Plumbing Devices: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L

E7051AA

EPDM Sulfur Cured

-50~100°C 70±5 1494 301

31
70hrs @100  °C

NSF61 Gasket/Sealing Materials and O-Rings

Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L
Section 9-Mechanical Plumbing Devices: Certified for a maximum surface area to volume ratio of 0.4 sq. in./L

N7041AA
NBR Sulfur Cured

-40~100°C

70±5 2478 290

8.3
22hrs @ 100 °C

NSF61 Gasket/Sealing Materials and O-Rings
Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L
Section 9-Mechanical Plumbing Devices: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L

S7031AB
VMQ Peroxide Cured

-70~225°C 70±5 1109 204

16
22hrs @ 175 °C

NSF61 Gasket/Sealing Materials and O-Rings
Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L.

N7018AA
NBR Peroxide Cured


-40~100°C 70±5 2914 332

11.5
22hrs @ 100 °C

NSF61 Gasket/Sealing Materials

Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L.

NSF42 Gasket/Sealing Material
certified for a maximum use level of 0.35 sq.in./L.

WRAS RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - MATERIAL ONLY. For use with water up to 85°C.

E6083AA
EPDM Peroxide Cured

-55~150°C 60±5 1993 389

16.1
22hrs @125  °C

NSF61 Gasket/Sealing Materials
Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L.

ACS joint/seal,gasket,o-ring and accessories component
Certified for a maximum surface area to volume ratio of 3.0 sq. cm./L.

WRAS RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - MATERIAL ONLY. For use with water up to 85°C.

E7083AA
EPDM Peroxide Cured

-55~150°C 70±5 2215 180 14.1
22hrs @125  °C
NSF61 Gasket/Sealing Materials

Section 6-Joining and sealing materials: Certified for a maximum surface area to volume ratio of 2.0 sq. in./L.

ACS joint/seal,gasket,o-ring and accessories component
Certified for a maximum surface area to volume ratio of 3.0 sq. cm./L.

UBA(KTW) cold water 23 °C and hot water 85 °C

W270 Certified.

WRAS RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - MATERIAL ONLY. For use with water up to 85°C.

AS/NZS 4020 For use with water up to 85°C.

E7053AA
EPDM Peroxide Cured

-55~150°C 70±5 2105 171

14.5
22hrs @150  °C

WRAS RUBBERS - RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - COMPONENTS. Tested in-radius size between 0.25mm and 5.00mm.. For use with water up to 85°C.

E8083AA
EPDM Peroxide Cured

-55~150°C 80±5 2187 152

13.2
22hrs @125  °C

WRAS RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - MATERIAL ONLY. For use with water up to 85°C.

E9053AA
EPDM Peroxide Cured

-50~150°C 90±5 2044 105

15.1
22hrs @125  °C

WRAS RUBBERS - RUBBERS - ETHYLENE PROPYLENE DIENE MONOMER (EPDM) - COMPONENTS. Tested in-radius size between 0.5mm and 5.00mm.. For use with water up to 85°C.


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