How To Adjust Hunter Sprinkler Head

Adjusting Hunter sprinkler heads is a crucial step in maintaining a healthy and efficient lawn. These sprinkler heads are designed to deliver water evenly to your grass, ensuring optimal growth and a lush, green appearance. However, over time, sprinkler heads can become misaligned or clogged, leading to uneven watering patterns and potential lawn damage.

Fortunately, adjusting Hunter sprinkler heads is a relatively straightforward process that can be completed in just a few minutes. By following a few simple steps, you can ensure that your sprinkler system is operating at its best, providing your lawn with the water it needs to thrive. In this guide, we will provide detailed instructions on how to adjust Hunter sprinkler heads, including tips on troubleshooting common issues.

Before you begin, gather the necessary tools, including a flathead screwdriver or Allen wrench, depending on the type of sprinkler head you have. It’s also a good idea to wear gloves to protect your hands from any dirt or debris. Once you have your tools and safety gear ready, you can proceed with the adjustment process.

Identifying Sprinkler Head Types

Understanding the types of sprinkler heads is crucial for proper adjustment. Hunter, a renowned sprinkler manufacturer, offers various models designed for specific irrigation needs. Here’s a comprehensive guide to help you identify your Hunter sprinkler head type:

Pop-Up Sprinkler Heads

These heads retract into the ground when not in operation, minimizing obstacles for mowing and other activities. Hunter’s pop-up models include:

PGP (Professional Grade Pop-Up): Designed for commercial and residential applications, they feature adjustable nozzles and a click-type adjustment mechanism.
PRS (Professional Rotary Spray): Also known as rotors, these heads rotate to cover larger areas, offering adjustable arc settings and spray distances.
MP Rotator (Multi-Stream Precision Rotator): These innovative heads emit multiple streams of water, providing even coverage, reduced runoff, and water savings.

Fixed Spray Sprinkler Heads

These heads remain above ground and are ideal for small areas. Hunter’s fixed spray models include:

PRO-SPRAY PRS 30: A compact spray head designed for narrow strips and tight spaces, featuring a 0-360-degree adjustable arc.
PFS (Professional Full Spray): These heads offer adjustable nozzles and a full-circle or part-circle spray pattern.

Sprinkler Head Type	Description
PGP	Professional Grade Pop-Up
PRS	Professional Rotary Spray
MP Rotator	Multi-Stream Precision Rotator
PRO-SPRAY PRS 30	Compact Spray Head
PFS	Professional Full Spray

Gathering Necessary Tools

Before embarking on your sprinkler head adjustment journey, it’s crucial to assemble the necessary tools to ensure a smooth process. Here’s a comprehensive list of essentials you’ll need:

Essential Tools:

Sprinkler spanner or flat-head screwdriver
Allen wrench (typically 3/64 inch or 1.2 millimeter)
Adjustable pliers or wire cutters (optional)
Bucket or bowl for testing water flow (optional)

Additional Equipment:

Safety glasses: Protect your eyes from any debris or water spray.
Work gloves: Shield your hands from cuts or abrasions.
Cloth or towel: Absorb any excess water during adjustments.
Precision screwdriver set: For adjusting screws with delicate threads.

Tool	Purpose
Sprinkler spanner	Unscrewing sprinkler head assembly
Allen wrench	Adjusting spray pattern and radius
Adjustable pliers	Removing clogged nozzles or debris (optional)
Wire cutters	Shortening pop-up height (optional)

Locating and Shutting Off the Water Supply

Before beginning any sprinkler head adjustments, it is crucial to locate and shut off the water supply to prevent water damage. Follow these steps to locate and shut off the water supply:

Identify the Water Source: Locate your main water shut-off valve, typically found near the front of your house or in the basement. It is usually a large, round valve.
Shut Off the Main Valve: Use a wrench or pliers to turn the main valve clockwise, closing it completely. This will cut off the water supply to the entire house.
Locate the Irrigation Shut-Off Valve (if applicable): If your irrigation system is separate from your main water supply, locate the dedicated irrigation shut-off valve, which may be near the sprinkler system’s controller. Close this valve to isolate the water supply to the sprinkler heads.

Tip

It is advisable to place a towel or bucket under the water shut-off valves in case of any leaks or drips.

Removing the Sprinkler Head

To remove the sprinkler head, follow these steps:

Locate the adjustment screw. It is usually located on the top of the sprinkler head.
Turn the adjustment screw clockwise. This will loosen the sprinkler head.
Pull the sprinkler head straight up. It should come off easily.
Inspect the sprinkler head for any damage. If there is any damage, replace the sprinkler head.

Tips for Removing the Sprinkler Head

If the sprinkler head is stuck, you can use a pair of pliers to gently pry it loose.
Be careful not to damage the sprinkler head or the pipe when removing it.
If you are having trouble removing the sprinkler head, you can contact a professional.

Troubleshooting

Problem	Solution
The sprinkler head is stuck.	Use a pair of pliers to gently pry it loose.
The sprinkler head is damaged.	Replace the sprinkler head.
I am having trouble removing the sprinkler head.	Contact a professional.

Adjusting the Arc Angle

Hunter sprinkler heads typically have an adjustable arc angle, allowing you to customize the area they water. Adjusting the arc angle is a relatively simple process that can be completed in a few steps:

1. Identify the arc adjustment screw on the sprinkler head. It is usually located on the top or side of the head.
2. Use a flathead screwdriver or the key provided with the sprinkler head to turn the screw.
3. Turn the screw clockwise to decrease the arc angle and counterclockwise to increase it.
4. Observe the sprinkler pattern and make further adjustments as needed until you achieve the desired coverage.

Adjusting the Arc Angle in Specific Hunter Models

The specific steps for adjusting the arc angle may vary slightly depending on the model of Hunter sprinkler head. Here are some common Hunter models and their arc angle adjustment procedures:

Model	Adjustment Procedure
PGP	Turn the arc adjustment screw located on the top of the head using a flathead screwdriver.
MP Rotator	Use the spray pattern adjustment tool to rotate the nozzle ring and adjust the arc angle.
SRM	Turn the arc adjustment screw located on the side of the head using a flathead screwdriver or the provided key.

Changing the Spray Pattern

Hunter provides a wide range of spray nozzles with different patterns and flow rates to customize your irrigation system according to your landscaping needs. To change the spray pattern, follow these steps:

Locate the Nozzle: Find the sprinkler head and identify the nozzle located at the top.
Remove the Nozzle: Screw off the nozzle by turning it counterclockwise.
Select the Desired Nozzle: Choose the appropriate nozzle for your desired spray pattern and flow rate. Hunter offers a variety of nozzles, including:

Nozzle Type	Spray Pattern	Flow Rate
15A	15-degree arc	0.5-1.0 GPM
20A	20-degree arc	0.6-1.2 GPM
25A	25-degree arc	0.7-1.4 GPM
30A	30-degree arc	0.8-1.6 GPM
35A	35-degree arc	0.9-1.8 GPM

Install the New Nozzle: Screw on the new nozzle by hand, then use a wrench to tighten it firmly.
Adjust the Stream: Once the nozzle is installed, you can adjust the stream by turning the nozzle body clockwise to reduce the flow or counterclockwise to increase the flow.
Rotate the Head (Optional): If necessary, you can rotate the sprinkler head to change the direction of the spray. To do this, use a wrench to loosen the lock ring on the base of the sprinkler, rotate the head to the desired position, and tighten the lock ring again.

Reinstalling the Sprinkler Head

1. Remove the old sprinkler head. Use a flathead screwdriver to pry off the old sprinkler head from the riser. Be careful not to damage the riser.

2. Clean the riser. Remove any dirt or debris from the riser using a wire brush. This will ensure that the new sprinkler head will fit snugly.

3. Apply sealant to the riser. Apply a thin layer of waterproof sealant to the riser. This will help to prevent leaks.

4. Install the new sprinkler head. Align the new sprinkler head with the riser and press down firmly. Make sure that the sprinkler head is flush with the ground.

5. Turn on the water. Turn on the water to the sprinkler system and check for leaks. If there are any leaks, tighten the sprinkler head further.

6. Adjust the sprinkler head. Adjust the sprinkler head to the desired spray pattern and range. Use a screwdriver to turn the adjustment screw.

7. Setting the Spray Pattern

Spray Pattern	Adjustment Screw
Full circle	Adjust screw to 0 degrees
Half circle	Adjust screw to 90 degrees
Quarter circle	Adjust screw to 180 degrees

8. Test the sprinkler head. Run the sprinkler system for a few minutes to test the new sprinkler head. Make sure that the spray pattern and range are correct.

Adjusting Pop-Up Height

Adjusting the pop-up height of a Hunter sprinkler head ensures that the water is distributed evenly and efficiently across your lawn. Here’s a step-by-step guide:

1. Turn Off Water Supply

To begin, shut off the water supply to the sprinkler system using the main valve.

2. Locate the Adjustment Screw

On top of the sprinkler head, you will find a small adjustment screw, often made of plastic or metal.

3. Insert Screwdriver

Using a flathead screwdriver or the designated adjustment tool, insert it into the adjustment screw and turn it clockwise.

4. Raise the Sprinkler Head

As you turn the screw clockwise, the sprinkler head will rise higher out of the ground.

5. Check Height

Continue turning the screw until the sprinkler head reaches the desired height. Typically, it should be just high enough to clear the grass blades without interfering with mowing.

6. Turn Counterclockwise

To lower the sprinkler head, simply turn the screw counterclockwise.

7. Tighten Screw

Once you have adjusted the height, tighten the screw securely by turning it a quarter or half turn clockwise.

8. Height Specifications

The ideal pop-up height varies depending on the specific Hunter sprinkler model and the type of grass you have. Refer to the table below for general guidelines:

Sprinkler Model	Pop-Up Height (inches)
PGP	4-6
MP Rotator	6-12
I-20	2-4
I-70	4-6

9. Turn On Water Supply

Once the pop-up height is adjusted, turn the water supply back on and check for any leaks or uneven watering.

Troubleshooting Common Issues

9. Spray Head Rotation Issues

Hunter sprinkler heads can sometimes fail to rotate properly, causing uneven watering patterns. Here’s a detailed troubleshooting guide for this issue:

Symptom	Possible Cause	Solution
Sprinkler head rotates slowly or not at all	Clogged nozzle or debris in the head	Remove the sprinkler head and clean the nozzle and head assembly.
Sprinkler head rotates erratically	Damaged gear or bearing inside the head	Replace the sprinkler head.
Sprinkler head rotates in only one direction	Misaligned or broken directional vane	Adjust or replace the directional vane.
Sprinkler head skips over certain areas	Sprinkler head is not level or is tilted	Adjust the sprinkler head height or level it properly.
Sprinkler head sprays water in an unexpected direction	Misaligned spray nozzle or broken seal	Adjust the spray nozzle or replace the seal.

Maintaining and Scheduling Sprinkler Adjustments

Cleaning Sprinkler Heads

Regularly cleaning sprinkler heads is essential for maintaining optimal performance. Clogged heads can prevent water from reaching designated areas, leading to uneven watering and potential damage to plants. Use a soft brush or cloth to gently remove debris from the nozzles and any visible dirt from the sprinkler head.

Adjusting Spray Pattern

Sprinkler heads can be adjusted to alter the spray pattern and coverage area. Most heads offer adjustable nozzles that can be rotated to narrow or widen the spray radius. Start by observing the current spray pattern and identify areas that need modification. Adjust the nozzles accordingly to optimize coverage and minimize overspray.

Checking Sprinkler Head Height

The height of the sprinkler head can significantly impact the watering efficiency. Proper head height ensures adequate water distribution and prevents overwatering. Adjust the height of pop-up sprinkler heads by turning the adjustment screw located at the base of the head.

Inspecting Sprinkler Head Alignment

Improperly aligned sprinkler heads can result in water wastage and uneven watering. Inspect the alignment of each head regularly and ensure it is positioned perpendicular to the ground. Any misalignment can be corrected by carefully adjusting the head.

### Adjusting Hunter Sprinkler Head Pressure

Hunter sprinkler heads incorporate an adjustable pressure regulator that allows you to modify the water pressure delivered to the head. Adjusting the pressure can optimize spray distance and prevent damage to delicate plants. Use a small flathead screwdriver to turn the regulator in small increments until the desired pressure is achieved.

### Troubleshooting Sprinkler Head Issues

If you encounter problems with sprinkler heads, such as uneven watering, clogged nozzles, or misalignment, promptly identify and address the issue. Refer to the manufacturer’s instructions for specific troubleshooting steps. Prompt attention will help maintain efficient operation and prevent costly repairs.

### Scheduling Sprinkler Adjustments

Regularly scheduled sprinkler adjustments ensure optimal performance and water conservation. Considerations for scheduling include seasonal changes, rainfall patterns, and plant growth. Adjust the sprinkler timer according to the specific needs of your lawn and garden.

### Monitoring Sprinkler Performance

Regularly monitor the performance of your sprinklers to identify any inconsistencies or inefficiencies. Check for dry spots or overwatering, and adjust the heads or schedule as necessary. Active monitoring will ensure your irrigation system is functioning at its best.

### Measuring Water Usage

Measuring water usage can help optimize watering practices and reduce water consumption. Use a water meter to monitor the quantity of water supplied to your lawn and garden. This data will provide insights into water usage patterns and help you make informed adjustments.

### Consulting Professionals

If you encounter difficulties or have concerns about your sprinkler system, do not hesitate to consult a qualified professional. Licensed irrigators possess the expertise and knowledge to diagnose and resolve sprinkler issues efficiently, ensuring optimal performance and water conservation.