Preventing the reduction of residual salt concentration by converting red rust in the main water supply pipe (distribution pipe) to black rust.

The red rust prevention device "NMR Pipe Protector" converts red rust inside water pipes to black rust and prevents the decrease of chlorine (residual chlorine) concentration for disinfection.

The NMR Pipe Protector has been widely adopted as a device for preventing red rust in piping and extending the lifespan of pipes, and it has recently gained attention in water distribution pipes of water supply agencies. At the Japan Water Works Association's water research presentation held in 2013, the Yokohama City Water Bureau published a paper reporting the results of a demonstration experiment showing that the use of this product can suppress the decrease in chlorine concentration in tap water. This matter was also reported as an article in the Japan Water News. The initial verification confirmed the reduction of iron ion levels in the water and the increase in residual chlorine concentration before and after installation in the water supply pipe within the Tsurumi water reservoir's associated housing. Next, a comparison of residual chlorine concentrations was conducted, revealing that before installation, the chlorine concentration was 0.5 PPM in the test pipe located 10 meters from the main pipe, 0.3 PPM at 60 meters, and 0.2 PPM at 135 meters, indicating that the residual chlorine concentration decreased with increasing distance due to red rust in the piping. After the installation of the NMR Pipe Protector, it was confirmed that the chlorine concentration at 135 meters doubled. From these test results, the effectiveness of suppressing the decrease in chlorine concentration was verified, demonstrating that the NMR Pipe Protector can also be used to prevent red rust deterioration in the main water supply pipes (distribution pipes). *For more details, please refer to the PDF or contact us.*

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