Co-op Nomura Minami Ishikiri Apartment Water Supply Pipe Effect Verification of Red Rust to Black Rust Conversion

In August 2001, 23 years after its construction, the Coop Nomura Minami Ishikiri installed a pipe rehabilitation device called the "NMR Pipe Protector."
The vinyl-lined water supply pipes have a statutory useful life of 20 years, and although 20 years have passed, making it 43 years since construction, they continue to be used without any signs of red rust deterioration.
A few years ago, a pipe inspection was conducted, confirming that the red rust had turned to black rust and that the deterioration of the pipes had stopped.

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