A versatile quick release coupling system utilises units with male or female threads for screwing onto piping or pump outlets and hosetails for hose assemblies. Connection is achieved by inserting the Adaptor into the Coupler and closing the arms with hand pressure. Couplings can be used for the transfer of aqueous liquids, dry bulk materials, fuels, chemicals, cosmetics, vapours and food products. These couplings conform to standard A-A-59326 and are interchangeable in sizes 20 to 150 mm with other products manufactured to the same standard, sizes 15 and 200 mm are not covered by this standard and components from different manufacturers’ may not interchange.