ideal For Going Away For Long Weekendscontrolled Irrigation Solutionindividually-controlled Watering Outputs, Great For Crops With Different Water Requirementsperfect For The Patiogro®, This Innovative System Comes Complete With Twelve Leads & Nozzles, One For Each Tray. These Nozzles Are Fully Adjustable To Control The Required Flow Of Water & Can Be Individually Switched Off.controlling The Water Flow Is Very Important Because Mature Plants Need A Lot More Water Than Young Plants. The Water Flow Is So Easy To Control You Just Turn The Nozzle To Increase Or Decrease It.you Can Attach The System To Your Patiogro® With The Clips Supplied & Attach To Your Hose With The Quick Connect Attachment Supplied & All Twelve Trays Are Watered At Once.it Saves On Time & Also On Water & You Dont Get Loads Of Water & Compost All Over The Floor. You Can Also Attach A Water Timer & Then Watering Is Done Automatically, Ideal If You Are Going Away On Holiday.