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The "assessment basis for plastics and other organic materials that have contact with drinking water" (KTW-BWGL) will come into force in Germany on 1st March 2025 and also be legally binding for elastomers. Angst+Pfister is expecting the KTW-BWGL to also determine the hygiene regulations of the others of the "4 member states" - that is in France, the Netherlands and the United Kingdom. This means that fewer additives are going to be allowed in the elastomer compounds, and this will encompass peroxides. The carbon black used must be purer. The permitted migration values will be significantly tightened, as will be the microbiological requirements. "This makes the manufacture of reliable elastomers with good mechanical properties even more of a challenge," says Reto Müller. 

Angst+Pfister developed HITEC^® DW EPDM on its own and owns the formula for it. As an independent proprietor, Angst+Pfister is able to control every development and lessen the risks for its customers - such as those regarding deliverability. The material with its new additives goes above and beyond compliancy with the stricter standards. Its mechanical properties at minus 57 to 150 degrees Celsius are comparable to those of the current elastomers for drinking water applications: Angst+Pfister has already extensively tested its latest high-performance elastomers. In low temperatures, it is even better than the previous one.