The Hunter PGP-ADJ nozzle can be adjusted in just a few steps. It is important to have the appropriate tools when adjusting or changing out your nozzle. These tools include a Hunter adjustment tool, the desired nozzle tree, a nozzle insertion collar, and a set of needle-nose pliers. To adjust the PGP-ADJ simply locate the arc adjustment slot and use the Hunter tool to manipulate the arc how you need it. For more information on how to adjust the arc, visit Sprinkler Warehouse's how-to videos library.