Non-potable Impact Sprinklers
Non-potable impact sprinklers are marked with a purple cap so they can be easily identified. It means that sprinkler heads use reclaimed or non-potable water, water that should not be consumed but can be used for irrigation purposes.
This is a great solution to conserving water when it's necessary. In fact, according to the United States Environmental Protection Agency, non-potable water reuse is one solution that can help communities reclaim, recycle, and then reuse.