What does the plumbing color coding of blue indicate?

The color coding of blue in plumbing systems is specifically used to indicate cold water supply lines. This standardization helps ensure that anyone working with or around plumbing installations can easily identify the type of water being carried through the pipes. Understanding this color coding is crucial for safety and efficiency during installation, maintenance, and repairs, as it prevents confusion between hot and cold water systems.

In plumbing installations, color coding serves as a visual aid to quickly convey important information about the function of each pipe, avoiding potential accidents or mistakes. Pipes designated for cold water are uniformly marked blue, making it straightforward for plumbers and technicians to distinguish them from hot water lines, which are typically marked red.