Product Description Hunter Root Zone Watering System In order for young plants and trees to thrive, it’s critical they receive a healthy, steady irrigation flow and the exchange of air from day one. Developed to meet this challenge, the Root Zone Watering System features Hunters patented Strata Root design, which is a series of internal baffles that deliver water where its needed most. The RZWS comes pre-assembled to save time, and the enclosed design and grate protect irrigation hardware from vandalism. For efficient irrigation of trees and shrubs delivered at the root, the Hunter RZWS is the solution. Specifications; Application: Shrub and Tree Irrigation Application: Residential/Commercial Size: 10, 18 Flow: 0.946lts /min 0.25GPM For Healthier Trees and Shrubs, Get to the Root of Things. 1/2″ Male Thread. Click for Product Brochure