Certified Landscape Irrigation Auditor

What could indicate excessive flow in a drip irrigation system?

1. Regular pressure readings

2. Consistent emitter output

3. Pressure readings exceeding acceptable limits

4. Shorter tubing

The correct answer is: Pressure readings exceeding acceptable limits

In a drip irrigation system, excessive flow can be indicated by pressure readings that exceed the acceptable limits for that system. Drip irrigation relies on maintaining a specific pressure range to ensure that water flows efficiently through the emitters and reaches the plants without causing runoff or deep percolation. When the pressure exceeds acceptable limits, it suggests that more water is being forced through the system than is designed to be discharged. This situation can lead to over-application, which can harm plant health, lead to the leaching of nutrients, and cause wastage of water. Moreover, excessive pressure can damage emitters or fittings, leading to leaks and system failure. Regular pressure readings and consistent emitter output would typically indicate that the system is functioning normally, not exhibiting excessive flow. Similarly, shorter tubing does not inherently relate to flow issues but rather to the design and layout of the system.