Meet another little new family, NIRON transition fittings from PP-RCT to PEX cold expansion Standard ASTM F 1960 from 1/2" to 11/2"! The family is now bigger thanks to measures 11/4" and 11/2". NIRON is a complete polypropylene pipe and fitting system for the distribution of hot and cold water in plumbing and air conditioning systems, for the conveyance of drinking water and alimentary fluids, for installations in industrial plants and for the transport of compressed air and chemical substances. The pipes and fittings that compose the NIRON range are produced using random copolymer polypropylene PP-RCT, a plastic material with a special molecular structure ensuring high mechanical resistance and duration, even at high temperatures and pressures. The properties and other features of the various components make the NIRON system a great alternative to traditional material used in plumbing installations.