NIBCO Press System Press Fitting Part Number: 9002055PC The NIBCO Press System reduce copper coupling features an EPDM interior and O-ring. Simply apply pressure from a pressure tool to squeeze the O-ring onto the tube, ensuring a clean, airtight seal in seconds without flame, solder or flux. The coupling has press connections. The fitting provides a method of connecting a larger size to a smaller size tube. 1 unit.