Insert the key end of the Hunter wrench into the lift-up socket of a pop-up sprinkler. Pull the riser up to gain access to the nozzle socket.
Using the Hunter wrench, loosen the nozzle-retainer/ range-adjustment screw. If a nozzle is already installed in the sprinkler, it may now be removed by briefly turning on the water.
Discard nozzle if removed with pliers. Slip the desired nozzle into the nozzle socket. Note that the socket is angled up 25° (see Fig. 4). Tighten the nozzleretainer/range-adjustment screw.