Select the items you wish to purchase:
Begin by using the pull up tool to raise the sprinkler head, exposing the nozzle and holding it in place.
Unscrew the old nozzle and remove it and the filter from the pop-up stem. At this point you should inspect the stem for debris, and even flush the head for a few seconds.
Next, insert the new filter and screw on the new nozzle. Position the nozzle to face correctly by twisting the top in to place.