NIRON PP-RCT pipes and fittings were successfully installed in a secondary school in Minnesota hosting around 2,000 students to replace the old steel piping that showed some leakage. The NIRON system is always a viable alternative to steel pipes due to its inertia to any corrosion caused by water and its special chemical composition. NIRON PP-RCT is a complete polypropylene pipe and fitting system manufactured 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 combined use of butt fusion, socket fusion and electrofusion welding allowed to exploit the system properties to the fullest and to run the works quickly and safely. Typically PP-RCT NIRON does not require visits for testing, but because it is installed in a school, additional checks were requested by the school board. After an exhaustive presentation of the electrofusion technique, the contractor selected this option for being an excellent time and money saving option. The system was installed for chilled water, potable hot and cold water.