4 Easy Ways To Adjust Hunter Sprinklers - WikiHow

The rotor head controls the arc, which is the sprinkler coverage from side to side. Hunter PGJ adjustable heads can be set anywhere from 40 degrees to 360 degrees, while PGP Ultra heads can be set from 50 degrees to 360 degrees.[7]

1. 1 Find the arrow on top of the sprinkler cap to locate the nozzle. Look for a raised, rubber circle with the outline of an arrow on it. Follow the arrow to find where the water sprays out of the sprinkler nozzle.[8]
   • You can adjust your sprinkler with the water on or off.
2. 2 Check the current arc by spinning the head to the left and right. Use your hand to gently twist the sprinkler head as far to the left as it will go. Note where the arrow is pointing—this is the left stop of your arc. Spin the head toward the right as far as it will go and check where the arrow is pointing—this is the right stop.[9]
   • This step can tell you how far you need to adjust the sprinkler arc so it will spray the areas of your lawn that need water.
3. 3 Insert the plastic end of the Hunter key into the lifting socket. The lifting socket looks like a circle with a line or rectangle running through the center of it. Push the plastic end of your Hunter wrench into this hole.[10]
4. 4 Twist the key and pull up on the socket to remove the sprinkler head. The entire sprinkler head will pop out of the base so you can adjust the inner assembly. Now, you can check your arc distance and change it if necessary.[11]
   • Remove the Hunter wrench while the sprinkler head is pulled up to make adjustments to the left. You can adjust the sprayer toward the right without the key.
5. 5 Twist the sprinkler head to line up the arrow with your right stop. Use your hand to gently tighten the sprinkler head. Keep going until the arrow is pointing where you want the sprinkler to stop spraying on the right side of its arc.[12]
   • If your base won’t tighten anymore, grab the entire sprinkler cap and turn it clockwise to loosen it. Lift the inner assembly out of the sprinkler base.[13]
     • Spin the cap all the way to the right, then put it back in the base with the arrow pointing where you’d like your right stop to be. Twist the cap clockwise to tighten it into the base.
6. 6 Insert your Hunter wrench key into the plus/minus slot on the cap. The plus/minus arc adjustment slot has a big “X” in the center and a “+” and “-” on the outside. Push the key end of your Hunter wrench into this hole to make adjustments to the left stop.[14]
   • You may be able to make plus/minus adjustments by inserting a 1⁄4 inch (0.64 cm) screwdriver or hex wrench into the slot.[15] However, Hunter Industries states that you need the key to make this adjustment.[16]
7. 7 Hold the sprinkler head while turning the key clockwise to widen the arc. Use your hand to hold the sprinkler head in place so the arrow stays pointing on your right stop. Then, turn the key clockwise to widen the arc. Each full turn will widen the arc by 90 degrees. Stop if you meet resistance or hear a grinding sound.[17]
   • The highest you can widen your arc is 360 degrees. When you reach this point, the key will either stop moving or you’ll hear a grinding sound.
   • Clockwise is the plus, or positive, direction.
8. 8 Check the arc to make sure the stop points are correct. Turn your sprinkler head to the right, then to the left. Make sure the arrows line up with your desired right and left stop points.[18]
9. 9 Turn the key counterclockwise to shorten the sprinkler arc. If you widen the arc too far, simply turn the Hunter wrench key in the counterclockwise direction to shorten your arc.[19]
   • Counterclockwise is the minus, or negative, direction.
10. 10 Push down on the sprinkler head to close it. Once your adjustments are complete, slide your sprinkler head back down into the base. You’re all set to water your lawn![20]
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