Pressing tools, jaws and chain sets are an integral part of ensuring a reliable, permanent connection between copper piping and NIBCO Press System pecent fittings and valves. Use only pressing tools, jaws and chain sets that have been tested and approved for use with NIBCO Press System pecent fittings and valves. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. NIBCO Press System pecent applies the proven performance of press technology to NIBCO valves and fittings ? the most specified flow control products in the industry. The NIBCO Press System pecent features a full range of precision engineered copper and copper alloy fittings, commercial valves, accessories, pressing tools, jaws and chains.