Approval DVGW W270

The approval according to DVGW W270 refers to the growth of microbial organisms on organic materials. The focus here is primarily on materials that come into contact with drinking water. Products that are to be used in drinking water systems in Germany must be approved in accordance with DVGW W270.

The German Technical and Scientific Association for Gas and Water (Deutscher Verein des Gas- und Wasserfaches e.V.) is the publisher of the requirements. 

As with the elastomer guideline, the aim is to ensure that the system components do not have a negative impact on drinking water during the production, distribution or storage stages.

#1 Definition DVGW W270 approval

The DVWG W270 approval confirms that a material made of organic materials in contact with drinking water complies with the maximum values for microbial growth.

#2 Significance of the approval according to DVGW W270

Elastomeric sealing elements are of organic origin and therefore fall under the regulatory scope of approval for drinking water applications. 

Manufacturers receive the DVGW W270 test certificate from an independent body. The award requires the disclosure of the material formulation and the passing of growth tests.

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