Certified Landscape Irrigation Auditor

At least how many catch devices should be used during an audit?

1. 12

2. 24

3. 36

4. 48

The correct answer is: 24

Using at least 24 catch devices during an irrigation audit is essential for obtaining reliable and representative data about the system’s performance. This number strikes a balance between adequately sampling the area being audited and managing the logistical aspects of the audit process. Having 24 catch devices allows for a more thorough assessment of distribution uniformity across different zones of the irrigation system. This helps in identifying any areas that may be receiving too much or too little water, which is crucial for making informed recommendations for system improvements. While it would be beneficial to use more catch devices to gather even more data, 24 is considered a minimum threshold to ensure that the results are significant and can effectively guide decisions regarding irrigation efficiency and overall system management. Underusing catch devices can lead to inaccurate evaluations and poor recommendations, while using significantly more may complicate the process without providing proportionate benefits. Thus, the choice of 24 balances effectiveness with practicality.