Reduce the maintenance costs for air conditioning hot and cold water piping in libraries, museums, etc., to less than one-tenth.

The Yokohama City Waterworks Bureau conducted a demonstration test to prevent the occurrence of red rust in water supply pipes and to solve the problem of reduced chlorine concentration in water due to red rust. This was verified using the water supply pipe in the bathroom of Room 102, which was vacant, in the Tsuzumi water reservoir's attached public housing that was 20 years old at the time. The piping materials used were polyethylene-lined steel pipes for shared areas and resin pipes for exclusive areas, where red rust occurred at the pipe joint. The iron concentration in the stagnant water at the bathtub water supply faucet before installation was 0.27 mg/l, and the residual chlorine at that time was 0.11 ppm. Additionally, during the two weeks prior to installation (with water flowing for 3 hours a day), the amount of red rust adhered to the faucet filter was 13 mg/l, indicating significant corrosion of red rust at the pipe joint. After installing the NMR pipe protector on the entire water supply inlet pipe (50A) of the Tsuzumi public housing, the iron concentration in the stagnant water at the bathtub water supply faucet decreased to 0.15 mg/l after one week, while the residual chlorine increased to 0.56 ppm, five times higher than before installation. The NMR pipe protector completely halted the deterioration of red rust, proving that the surface of the existing red rust transformed into passive black rust and that the reduction of chlorine ceased. *You can download the materials for free. *Please feel free to contact us first.