What is a common practice when installing a landscape irrigation system?

Installing a landscape irrigation system often involves using adjustable risers, which allows for flexibility in changing the height and direction of the spray heads. This adaptability is crucial because it enables the irrigation system to be tailored specifically to the landscape's requirements. For example, as plants grow, the height of the spray needed may change, and using adjustable risers allows the contractor to easily make those changes without needing to reinstall components or disturb the landscape significantly.

Additionally, adjustable risers help in optimizing water distribution and coverage. They can be raised or lowered to ensure that water reaches all areas of the landscape evenly, which is vital for maintaining plant health and conserving water. This practice also supports efficiency by minimizing dry spots and reducing runoff, which can occur when water is not applied correctly.

In contrast, the other practices mentioned do not align as closely with effective irrigation installation. Using only non-adjustable heads might limit the system's adaptability over time, while burying pipes deeply can lead to challenges accessing them for future maintenance or repairs. Setting an irrigation system and neglecting it undermines the goal of efficiency and adaptability, as landscapes can change, and conditions may require regular adjustments to the system for optimal performance.