Based on standard components including the standard union nut of the STAUFF Connect product range according to ISO 8434-1 – No duplicate storage of similar stocking of similar components with a correspondingly high risk of confusion. Positive-locking connection with an elastomer sealing with a particularly large cross-section to provide secure and permanent sealing even in the event of unfavourable tolerances. Sealing of the only possible leakage path primarily via the STAUFF Form EVO sealing ring as well as the secondary, face sealing.