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