What is the recommended overlap for spray heads in an irrigation system?

The recommended overlap for spray heads in an irrigation system is 100%. This means that each spray head should overlap the area of coverage of the adjacent spray heads completely. Achieving 100% overlap ensures that there are no dry spots in the irrigated area, as every part of the landscape receives thorough watering. This overlap is particularly important for spray heads because they have a fixed radius of coverage and are more susceptible to wind drift and evaporation compared to more stationary types of irrigation, such as drip systems.

Complete overlap helps ensure that the distribution of water is uniform and efficient, maximizing water usage and promoting healthy plant growth. Thus, setting the spray heads to achieve full coverage not only enhances the performance of the irrigation system but also reduces the risk of over-watering or under-watering specific areas in the landscape.