Identification of Piping. All piping conveying non-potable water shall be permanently identified by a continuous purple coloring so that the piping is readily distinguishable from piping carrying potable water. (See the color codes of ANSI/NEMA Z535.1 and ASME A13.1.)

(Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)