1/2" Carbon Steel Union. Press x Female Pipe Thread

The NIBCO Press System 1/2 in. wrot copper union features an inboard bead and EPDM O-ring. Simply applying pressure from a press tool tightens the O-ring onto the tube, ensuring a clean, watertight seal in seconds with no flame, solder or flux. The union has press connections. It is used to allow repair to the line without damage between two press connections.