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Why offer a glossary?

In many texts or product decsriptions we like to work with abbreviations. These are common for our industry and most readers or customer know right away what is meant, because most of us use these in everyday worklife. For our English speaking customers we wanted to offer the opportunity to look up these abbrevations or terms that might not ring a bell right away. We hope this is helpful.


DVGW – Deutscher Verein des Gas- und Wasserfaches
The German Association for the Gas and Water Industry. The DVGW is a recognized standardization body for the gas and water industry, a centre for technical and scientific know-how in the gas and water sectors and an initiator and promoter of research projects and innovations (Source:, 06.08.2019)

EN 805 – Wasserversorgung
Water supply – Requirements for systems and components outside buildings; German version DIN EN 805:2000

G 469 – Druckprüfverfahren
German Technical Rules for Pressure Testing of Gas Pipes up to 1.6 Mpa

G 495 – Technische Regeln Gasanlagen
German Technical Rules for Gas Plants and Systems – Operation and Maintenance

The abbreviation LEL stands for Lower Explosion Limit and corresponds to the concentration of a substance in the air above which there is a risk of explosion. For us, the LEL of flammable gases such as methane, ethane, propane and butane is relevant.

TRGI – Technische Regeln für Gasinstallationen
German Technical Rules for Gas Installations 

TRWV – Technische Regeln Wasserverteilung
German Technical Rules for Water Distribution

W 400
W 400 is a DVGW worksheet dealing with the planning of distribution systems for drinking water supply. The second part of the Worksheet W 400-2 “Construction and testing of water supply systems” states that water pipelines must be subjected to a leak test prior to commissioning. It is intended to check the quality of the entire pipeline construction and to ensure a reliable water supply and high drinking water quality. The current methods for leak testing water pipelines are pressure loss methods: the contraction method, the standard method and the accelerated standard method. W 400 is the German national standard for EN 805 which is also available as firmware. In addition to that we are able to implement individual and international company standards such as requested by companies like Gas Natural (Spain), Eandis (Belgium), EWE (Germany) and Avacon (Germany). 

ZVSHK – Zentralverband Sanitär Heizung Klima
The Central Association for Sanitary, Heating and Air Conditioning is the professional organization, trade association and lobby of the SHK- craftsmanship in Germany.-