What color is used for the piping in a nonpotable irrigation system?

In a nonpotable irrigation system, purple piping is used to clearly indicate that the water within it is not safe for drinking or direct human consumption. This color-coding helps to prevent cross-contamination with potable water supplies, as it provides a visual cue to anyone working in the area, ensuring that the nonpotable system is easily recognized and handled properly.

The use of purple for nonpotable water systems is standardized in many regions to promote safety and compliance with local codes and regulations. This color designation not only aids in awareness for landscapers and maintenance workers but also helps the public identify the purpose of the piping, reducing the risk of accidental misuse or confusion with potable water systems.