Certified Landscape Irrigation Auditor Practice Exam 2026 - Free Landscape Irrigation Practice Questions and Study Guide

The primary use of a pilot tube in irrigation systems is indeed to check sprinkler pressure. A pilot tube, often part of a pressure gauge, is a small-diameter tube that allows for monitoring the pressure within irrigation system components, such as within pipes or at the head of sprinklers.

By providing precise pressure readings, it helps in ensuring that the system operates within optimal parameters, which is crucial for efficient water application. Maintaining the correct pressure not only improves the functionality of the irrigation system but also contributes to the effective distribution of water across the landscape, minimizing waste and maximizing system performance.

The other options pertain to functions that are not associated with a pilot tube. While soil moisture measurement is important in irrigation management, it is typically done using soil moisture sensors rather than pilot tubes. Analyzing water quality requires specific testing equipment that assesses pH, turbidity, or contaminant levels and is not the function of a pilot tube. Similarly, regulating flow control is a task typically managed by valves and other devices designed specifically for that purpose, rather than through a pilot tube.