The answer to 'irrigation system thin grass' is that a malfunctioning irrigation system is a common cause of thin, patchy grass. Symptoms can include uneven watering, dry spots, or areas of the lawn that are consistently drier than others. This can lead to thin, weak grass that is more susceptible to disease and weed growth.
The most common issues are broken or clogged sprinkler heads, leaks in the pipes, or an imbalance in the water pressure and coverage. These problems can often be diagnosed and repaired by a DIY homeowner, but may require the expertise of a professional landscaper or irrigation technician for more complex systems or severe damage.