DIN Couplings

DIN is a collective term for a group of European hose fittings with the term borrowed from the German Industry Standard (Deutsches Institut für Normung).

This is the officially recognised national-standards body of the German government. DIN is recognised across Europe as the standard German Tanker connection. DIN unions are used in conjunction with German and other European fluid transfer equipment. 


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Guillemin DN100 4" Male BSP with Locking Ring Aluminium



RS 1 1/2" Female Thread x Hose Tail Brass



RS 1 1/2" Male Thread x Hose Tail Brass



RS 1 1/4" Male Thread x Hose Tail Brass



RS 1 1/4" Male Thread x Hose Tail SS



RS 1" Female Thread x Hose Tail Brass



RS 1" Male Thread x Hose Tail Brass



RS 1" Vulkolan Seal



RS 2 1/2" Female Thread x Hose Tail Brass



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There are Three Ranges of DIN Coupling 

  • Storz - German origin – Used in both firefighting and industrial applications
  • Guillimin Symetrique -  French Origin – also mainly used in firefighting and industrial environments
  • Roman Seliger - German Origin - A type of coupling more suited to chemical handling.

How does it Work? 

Typically, these fittings are comprised of two halves which are identical, and connect by twisting the two halves together. 


They are ideal for the transfer of liquid that require high flowrates. A common application for the three groups of DIN fittings we supply into is firefighting equipment.

Technical Specifications

Please see data sheets for the technical specifications for each of the three ranges of DIN fitting. 

The French and German standards vary slightly and so please speak to our technical team here on +44 (0)1235 512500 to ensure we can quote you for the appropriate fitting or click here to contact us.