Hunter Sprinkler Head Replacement: Step-by-Step (2026)

A broken sprinkler head can turn your perfectly manicured lawn into a swampy mess or a collection of dry, brown patches. The good news is that a hunter sprinkler head replacement is a straightforward DIY project you can tackle in under an hour. The core of the job is simple: turn off the water, dig up the old head, screw the new one on, and adjust the spray. Whether you ran over a head with the lawnmower or it’s just worn out from years of use, this guide will walk you through every step, from turning off the water to fine tuning the spray pattern on your new rotor.

Getting Started: Prep Work and Essential Tools

Before you start digging, a little preparation makes the job of a hunter sprinkler head replacement much smoother. First and foremost, you need to prevent a geyser in your yard.

Step 1: Turn Off the Water Supply

This is the most critical first step. Your irrigation lines are under pressure, typically around 30 to 60 PSI. Forgetting to shut off the water before removing a head will result in a powerful spray that can flood your lawn and waste a tremendous amount of water. In fact, a single broken sprinkler can gush over 1,000 gallons per hour if left unchecked. If a break happens, follow our emergency sprinkler repair guide to shut things down fast.

Locate your irrigation system’s main shutoff valve, which is often near your water meter or backflow prevention device; if yours is due for backflow testing, now is a good time to schedule it, and turn it completely off. To be safe, run the sprinkler zone you’re working on for a minute to relieve any remaining pressure in the lines; if your timer isn’t responding, see our irrigation controller repair guide.

Step 2: Gather Your Tools

You don’t need a professional tool chest for this job. Most of what you need is probably already in your garage.

• A Small Shovel or Garden Trowel: To carefully dig around the sprinkler.

• Pliers or an Adjustable Wrench: For extra grip on a stubborn old sprinkler head.

• Teflon Tape (Plumber’s Tape): To create a watertight seal on the new head.

• A Bucket or Tarp: A pro tip to keep your lawn clean by holding the excavated dirt.

• The Hunter Rotor Adjustment Tool: This small plastic key is essential for adjusting the spray pattern on Hunter rotors.

If you find this list a bit daunting or would rather have an expert handle the job, the team at M&M Sprinklers LBK can perform fast, professional sprinkler repairs and Hunter head replacements.

The Replacement Process: A Step by Step Guide

With your tools ready and the water off, you can now get to the hands on part of your hunter sprinkler head replacement.

1. Dig Around the Head and Expose the Riser

Using your trowel, carefully cut a circle in the sod about 6 inches in diameter around the sprinkler head. Try to remove the plug of grass and soil in one piece and set it on your tarp. This makes it easy to put back later. Continue digging down around the sprinkler body until you have fully exposed the vertical pipe it’s connected to. This pipe is called the riser. Be gentle to avoid cracking the underground water line—if you suspect damage, follow our broken sprinkler line repair guide.

2. Unscrew and Remove the Old Sprinkler Head

Grasp the body of the old sprinkler head firmly and turn it counterclockwise (left) to unscrew it from the riser. If it’s stuck, use your pliers for extra leverage, but be careful not to snap the plastic riser. Once loose, lift the old head straight off. Stuff a rag in the open riser to prevent dirt from falling in while you prepare the new head.

3. Reassemble and Install the New Head

Before installing your new Hunter sprinkler, wrap the male threads of the riser with two or three layers of Teflon tape. Be sure to wrap it in a clockwise direction. This simple step helps ensure a leak free seal.

Now, take your new sprinkler head and carefully screw it onto the riser by hand, turning it clockwise (right). Hand tightening is usually sufficient to create a good seal. The top of the sprinkler head should sit flush with the surrounding ground level. This prevents it from becoming a tripping hazard and protects it from lawnmower blades. If it’s too high, dig a little deeper. If it’s too low, add some soil underneath it for support.

4. Turn On the Water and Check for Leaks

With the new head installed but the hole still open, it’s time for a leak check. Slowly turn the water supply back on and run that specific irrigation zone. Watch the connection point at the base of the new head. If you see any drips or spraying, the connection isn’t watertight. Turn the water off and tighten the head a little more or reapply the Teflon tape. Once you’ve confirmed there are no leaks, you can backfill the hole with soil and replace the plug of sod.

Fine Tuning Your New Hunter Rotor

A successful hunter sprinkler head replacement isn’t complete until you’ve adjusted the spray pattern to match your lawn’s needs.

Adjusting Arc and Radius on a PGP ADJ

Two key settings on a Hunter rotor like the PGP ADJ are the arc and the radius; for a deeper walkthrough, see our sprinkler nozzle adjustment guide.

• Arc: This is the rotation pattern, from a small slice to a full 360 degree circle.

• Radius: This is the distance the water travels from the head.

You’ll use the Hunter rotor adjustment tool for this. Insert the plastic key end into the arc adjustment slot on top of the rotor. Turn it clockwise to increase the arc and counterclockwise to decrease it. To adjust the spray distance, use the hex key end of the tool to turn the radius reduction screw on top of the nozzle. Tightening the screw shortens the throw. You can typically reduce the radius by about 25 percent without distorting the spray pattern.

Sprinkler Maintenance and Advanced Swaps

Sometimes you don’t need a full hunter sprinkler head replacement. A simple cleaning or part swap might be all that is required; our seasonal sprinkler maintenance checklist shows the quick checks that prevent most issues.

Cleaning a Clogged Nozzle and Filter Screen

If a sprinkler has weak or uneven spray, it might just be clogged. Unscrew the head’s cap to access the internal assembly. You’ll find a small filter screen below the nozzle. Pull this screen out and rinse it and the nozzle under clean water to remove any sand or debris.

Replacing a Seal or O Ring

A constant leak or puddle around the base of a pop up sprinkler often points to a worn out wiper seal or O ring. You can buy replacement seal kits for just a few dollars. Simply disassemble the head, pull out the old rubber seal with a small screwdriver, clean the groove, and install the new one. This quick fix can stop significant water waste.

Replacing a Nozzle on a Hunter PGP ADJ

You can change the spray distance and flow rate of a Hunter rotor by simply swapping the nozzle. Use the Hunter tool to loosen the radius screw, pull out the old nozzle, insert a new color coded one, and retighten the screw. This is a great way to customize coverage without replacing the entire unit.

Choosing the Right Hunter Replacement Model

Choosing the correct model is a critical step in a successful hunter sprinkler head replacement, especially if you’re upgrading or switching brands. Planning a broader upgrade? Explore our sprinkler installation and system upgrade services.

Cross Reference Non Hunter to Hunter Replacements

Most residential sprinkler heads use a standard 1/2 inch or 3/4 inch thread, making them physically interchangeable. However, you need to match the performance (flow rate and spray radius) to ensure even watering. Hunter provides official replacement charts to help you find the right Hunter rotor and nozzle combination to substitute for common Rain Bird or Toro models. If you’re unsure how to cross reference, an irrigation professional can help. The experts at M&M Sprinklers LBK can ensure your new heads match your system’s design perfectly.

Popular Hunter Rotors for Home Lawns

• Hunter PGP Ultra: This is the modern workhorse for residential lawns. An upgrade to the original PGP, it’s known for its durable, non strippable drive mechanism and automatic arc return. It’s an excellent choice for a reliable, all around hunter sprinkler head replacement.

• Hunter I 20: A step up from the PGP Ultra, the I 20 is a commercial grade rotor that’s popular in high end residential systems. Its key feature is the FloStop control, which allows you to shut off water flow to an individual head right at the source, making adjustments incredibly convenient.

Hunter Rotors for Large Properties

• Hunter I 25: With a 1 inch inlet, the I 25 is built for large residential properties and commercial spaces. It can throw water from 40 to 70 feet, covering a massive area with a single head.

• Hunter I 40: This is a powerhouse rotor designed for sports fields and parks. Featuring a rugged stainless steel riser, the I 40 can spray water over 90 feet. A broken commercial grade head like this can be a serious issue; a major leak can waste an astonishing 30,000 gallons of water per day.

Frequently Asked Questions

How do I know if I need a hunter sprinkler head replacement? Common signs include a head that won’t pop up or retract, visible cracks in the body, water gushing from the base instead of the nozzle, or inconsistent spray patterns that can’t be fixed by cleaning or adjustment.

Can I replace a Rain Bird sprinkler head with a Hunter? Yes. Most brands use standard thread sizes, so a Hunter head will physically screw onto a riser that held a Rain Bird. The key is to use a Hunter nozzle that matches the flow rate and radius of the old head to maintain even watering.

What is the most common Hunter sprinkler for homes? The Hunter PGP Ultra is arguably the most popular and versatile rotor for typical residential lawns, offering a great balance of performance, durability, and value. For pop up spray zones, the Hunter Pro Spray series is a common choice.

Why is my new sprinkler head leaking at the base? A leak at the threaded connection is usually caused by one of three things: the head isn’t tightened enough, you forgot to use Teflon tape on the riser threads, or the plastic riser itself is cracked.

Do I absolutely need the special Hunter adjustment tool? While you can sometimes get by with a small flathead screwdriver and an Allen wrench, the official Hunter rotor tool is designed to make the job much easier and safer for the sprinkler’s internal parts. They are inexpensive and a worthwhile investment for any homeowner with a Hunter system.

Completing a hunter sprinkler head replacement yourself is a satisfying project that saves money and keeps your lawn healthy. By following these steps, you can ensure your irrigation system runs efficiently. If you run into any trouble or prefer a professional touch, don’t hesitate to reach out. For expert sprinkler repair and maintenance in the Lubbock area, contact M&M Sprinklers LBK for friendly and reliable service.