The NIBCO Press System wrot copper female threaded tee features an inboard bead and EPDM O-ring. Simply applying pressure from a pressing tool tightens the O-ring onto the tube, ensuring a clean, watertight seal in seconds with no flame, solder or flux. The tee has press connections and a female NPT thread. It allows for a connection to be made in a continuous pipeline and branch out to a different direction between press connections and a threaded connection.