The answer to 'irrigation installation yellowing' is that there are several common causes, including improper watering, nutrient deficiencies, and pest or disease issues. Symptoms may include discolored, wilting, or stunted grass and plants. To troubleshoot and fix the problem, you'll need to carefully inspect your irrigation system and the affected areas of your landscape.
For minor issues, you may be able to resolve the problem yourself through adjustments to your watering schedule, applying fertilizer, or treating for pests. However, for more complex problems with the irrigation system itself, it's generally best to call in a professional landscaping or irrigation technician to diagnose and repair the issue.