Pipe anti-corrosion, Lions Mansion Koshigaya North has introduced NMR Pipe Protectors.

The installation of the rust prevention device "NMR Pipe Protector" on the water supply pipes has been confirmed through long-term verification that the black rust formation from red rust inside the pipes improves the condition of the piping every year.

The "Lions Mansion Koshigaya North" located in Koshigaya City, Saitama Prefecture, introduced the NMR Pipe Protector in November 2010. This successfully reduced the cost of pipe maintenance to one-third of the amount originally planned for lining work in the long-term repair plan. Before the installation of the NMR Pipe Protector, and one year, five years, and ten years after installation, the red rust blockage rate at the dissimilar metal joints, where red rust deterioration progresses the most, was continuously inspected, confirming that the red rust blockage rate decreased over time. This indicates that the red rust is gradually transforming into black rust, which is one-tenth the volume. This has proven that the water supply pipes can be extended to the lifespan of the building. The management association effectively utilized the saved budget for LED lighting upgrades and other repairs. In addition to the LED lighting upgrades, the renewal of elevators is also being considered in the future. As a result, the NMR Pipe Protector has become a savior for the condominium. It has significantly reduced the costs of pipe maintenance, allowing the remaining budget to be allocated to other building facilities. **Results of the NMR Pipe Protector:** - No growth of red rust was observed in the endoscopic survey conducted six years after installation. - A reduction in the volume of red rust was observed, indicating progress in the transformation to black rust.

Renovation and repair methods