Which piping color indicates a non-potable water system?

In plumbing and piping systems, specific colors are designated to indicate the type of fluid contained within the pipes, and this color-coding system helps to prevent confusion and promote safety. The color that typically indicates a non-potable water system is gold. This color designation signals that the water is not safe for drinking or culinary purposes, often due to contamination or a lack of treatment.

Non-potable water systems can include irrigation water, wastewater, or recycled water, and it is crucial for such systems to be correctly identified to prevent accidental contamination of potable water supplies. Using gold for non-potable water helps workers and the public easily recognize which systems should not be used for drinking or food preparation, thereby reducing the risk of health hazards associated with consuming unsafe water.