R309-525-8. Color Coding and Pipe Marking

The piping in water treatment plants shall be color coded for identification. The following table contains color schemes recommended by the Division. Identification of the direction of flow and the contained liquid shall also be made on the pipe. TABLE 525-1 Recommended Color Scheme for Piping Water Lines Raw Olive Green Settled or Clarified Aquamarine Finished Dark Blue Chemical Lines Alum Orange Ammonia White Carbon Slurry Black Chorine (Gas and Solution) Yellow Fluoride Light Blue with Red Band Lime Slurry Light Green Potassium Permanganate Violet Sulfur Dioxide Light Green with Yellow Band Waste lines Backwash Waste Light Brown Sludge Dark Brown Sewer (Sanitary or Other) Dark Gray Other Compressed Air Dark Green Gas Red Other Lines Light Gray