How Do I Adjust Hunter PGJ Sprinkler Heads? - EHow

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How do I Adjust Hunter PGJ Sprinkler Heads? By Mary Lougee Updated Aug 4, 2021 eHow may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here. Adjust the radius and arc of your Hunter PGJ spinklers for full coverage.

Hunter sprinkler heads are fully adjustable in the water coverage area. The PGJ sprinkler head is gear driven and sprays water from the right arc to the left arc setting. Increasing the radius of a sprinkler head drives the water farther away from the head. Adjusting the arc and radius of a sprinkler head is easy to do and allows full coverage of the lawn, plants and trees without overlapping coverage, thereby conserving water.

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Radius Adjustments

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Locate the Radius Reduction Screw

Place the metal hex end of a Hunter wrench or a flat screwdriver on the radius reduction screw. This screw is on the sprinkler head at the top of the Hunter name.

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Close the Water Flow Valve

Turn the screw clockwise to reduce the radius by closing the internal water flow valve.

Open the Water Flow Valve

Turn the screw counterclockwise to increase the radius by opening the internal water flow valve.

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Check Your Hunter PGJ Adjustments

Image Credit: Artur Nichiporenko/iStock/GettyImages

Remove the key or flat screwdriver, turn the watering system on and observe the adjustments.

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Arc Adjustments

Locate the Nozzle Turret

Grasp the sprinkler body with one hand. Turn the nozzle turret counterclockwise until it stops at the preset left stop. The nozzle turret is the area that sprays water out of the sprinkler head.

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Turn the Nozzle Turret

Turn the nozzle turret clockwise until it stops at the right fixed arc stop and hold it in this position. The fixed right stop is not adjustable. Arc adjustments on the left side control the direction of the water spray.

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Insert the Plastic Key End

Insert the plastic key end of the Hunter key or a hex wrench into the adjustment socket at the top of the head.

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Increase the Left Side Arc

Turn the key or hex wrench clockwise to increase the left side arc. The largest possible radius is 360 degrees and the key or wrench will stop turning at this point.

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Decrease the Left Side Arc

Turn the key or hex wrench counterclockwise to decrease the left side arc. The smallest possible radius is 40 degrees and the key or wrench will stop turning at this point.

Check Your Adjustments

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Remove the key or hex wrench, turn the watering system on and observe the adjustments

Tip

Replacement Hunter wrenches are available at home improvement stores carrying Hunter sprinkler products and online.

Sprinkler head radius is the distance that water travels from the sprinkler head.

The arc controls the left side stop of PGJ sprinkler heads. Factory left side settings are at 40 degrees.

Adjust sprinkler radius and arc to cover all areas for watering without overlapping coverage. Overlapping coverage leads to water pooling, grass remaining soggy and lawn diseases of mold and mildew.

Warning

Adjust the arc on sprinkler heads so they do not spray water on driveways and sidewalks. Continued watering of concrete or rock areas may leave the area wet, turn it green and form mold and mildew.

Mold and mildew on concrete is slick and may cause slipping accidents.

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references

• BW Land Sprinklers – PGJ Rotary Sprinkler Introduction Sheet
• Sprinkler Warehouse: How to Adjust a Hunter Rotor Head
• YouTube – TCR Watering Systems: Hunter PGJ Sprinkler. How to adjust the arc and radius

eHow may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here.

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