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Pioneer Industries 188141-H53 Motegi Two Handle Roman Tub Filler - Fixture Universe. Bathroom | Bathroom. Whole House Water Filter and Salt Free Softener System - Pelican Water Systems. The DVGW is an organization that establishes standards and test protocols. It also approves or certifies laboratories to then conduct testing according to those standards and protocols. The same can be said for NSF in the US.

The DVGW is located in Bonn, Germany. It has its own laboratory by the name of TZW located in Karlruhe, Germany. Beyond that, the DVGW has certified some twenty plus privately owned laboratories throughout central Europe who are authorized to conduct certification testing. The same holds true for NSF. It has its own laboratory and those certified by NSF like WQA, UL and Pace Laboratories to name a few. The DVGW also issues test marks or certifications (i.e. the WQA equivalent of a "Gold Seal") like the "W510" standard.

Learn more about DVGW 9191 - Water Devices for Scale Prevention The DVGW 9191 - Anti-Scale standard uses the worlds strictest guidelines to determine the effectiveness of a system to prevent scale using Worksheet W 510. Failures - PEX Plumbing Failures.