Irrigation Symbols are Plotting in Color Instead of Black
Issue
Your irrigation symbols are plotting in color when they should be black, no matter which CTB settings you use.
Other files may be plotting to black and white when you use the same CTB file.
Cause
The settings on the viewport you're trying to plot may have been changed from As Displayed to Realistic.
Solution
1. Verify that you're using the correct CTB plotting file.
2. Select the viewport you're trying to plot.
3. Type PROP in the Command line and press Enter to open the Properties panel.
4. In the Misc section of the Properties panel, select As Displayed from the Shade Plot menu.
Your symbols should now plot in black and white.