Standard IRRIGRAIN pipelines feature 3 mm thick walls, providing additional strength stability to each span. Available sizes include:5 9/16 inch,6 5/8 inch, 8 inch. Unlike the welded outlets that can leak over time in the other irrigation system, IRRIGRAIN systems feature sprinkler outlets that are formed as an integral part of the pipeline, ensuring precisely matched thresds for a water tight seal and a longer service life. The pipelines are all hot dip galvanized.