Certified Landscape Irrigation Auditor

Catch devices should be used in multiples of what number for effective testing?

1. 2

2. 3

3. 4

4. 5

The correct answer is: 4

Using catch devices in multiples of four for effective testing is based on the principle of achieving reliable and accurate measurements of irrigation distribution uniformity and performance. When four catch devices are employed, they provide a statistically significant snapshot of how water is being distributed across a specific area. This number allows for better averaging of results, accommodating for any variations in water application that might occur due to factors like wind, slope, and system layout. Using four catch devices helps to ensure that data collected represents a broader section of the irrigated area, thus mitigating the potential influence of anomalies like localized dry spots or overly wet areas. This provides a more balanced view of how well the irrigation system is functioning overall, allowing for more meaningful analysis and recommendations for improvements. While other numbers may provide some insights, using four devices aligns with industry standards for testing, making it a robust choice for anyone involved in landscape irrigation auditing.