Viega ProPress 3/4in Extended Coupling w/o Stop - Double Press Connection - Smart Connect Technology. ProPress 1/2in Extended Coupling without Stop - Double Press Connection - Smart Connect Technology Specifications for Viega ProPress Copper Extended Coupling Fitting - Double Press Connection: Manufacturer: Viega Quantity: 1 Features of Viega ProPress Copper Extended Coupling Fitting - Double Press Connection For use with ASTM B88 tubing Copper Press connection Components: EPDM sealing elements Note - Must be installed with Viega ProPress XL-C rings and V2 actuator Package Contents: Viega ProPress Copper Extended Coupling Fitting - Double Press Connection Viega 79010: ProPress 3/4in Extended Coupling w/o Stop - Double Press Connection - Smart Connect Technology