DIN 2353 

DIN (Deutsches Institut für Normung) is a German standard widely used by European industries in the field of hydraulic hygiene. It is available in L (medium pressure) and S (high pressure) series.

The DIN 2353 fittings are based on a screwing system with a cutting ring, containing 3 edges that bite into the surface of the pipe to be connected, thus ensuring a totally tight and secure assembly.