What is an example of a non-potable water system mentioned in the plumbing code?

Irrigation systems using reclaimed water are a prime example of a non-potable water system as specified in plumbing codes. Non-potable water systems utilize water that is not suitable for human consumption but can be used for purposes such as irrigation, industrial processes, and toilet flushing.

Reclaimed water, often treated wastewater, is specifically designated for these types of applications, where it is safe and effective for use in irrigation without the need for the higher treatment levels required for potable water. This practice not only conserves potable water resources but also promotes sustainable water management practices.

In contrast, residential drinking water supply and commercial greywater reuse involve systems that interact with potable water standards to ensure safety for human consumption or contact. Stormwater collection systems, while they might not be treated to drinking water standards, are primarily designed for drainage and flood management, not specifically as a water supply system. Hence, the focus on reclaimed water in irrigation illustrates adherence to practices that utilize water in a manner consistent with its suitability for non-potable uses.