Replacing a sprinkler head takes 10 to 15 minutes and costs $5 to $25 per head

A sprinkler head replacement is one of the simplest irrigation repairs you can do yourself. You turn off the water, unscrew the old head, screw in a new one that matches your system, and turn the water back on. The hardest part is usually identifying which type of head you have — pop-up, rotor, or drip — so you buy the right replacement. Most homeowners can do this without tools beyond an adjustable wrench or pliers, and you do not need to dig or cut any lines.

The cost depends on the head type. A basic pop-up spray head runs $5 to $15. A rotor head (the kind that slowly sweeps back and forth) costs $15 to $40. Drip emitters and micro-sprinklers range from $3 to $20. You can buy replacements at any hardware store or online, and they fit into the existing riser — the pipe stub sticking up from the ground — without modification.

Key Takeaways

  • Turn off the water at the main valve or zone valve before you start, so you do not flood the area while working.
  • Identify your head type by looking at its shape: pop-ups are short and rectangular, rotors are taller with a single nozzle, and drip heads are small and low-profile.
  • Unscrew the old head by hand or with an adjustable wrench, then screw the new one in by hand until snug — do not overtighten.
  • Buy a replacement that matches the spray pattern and radius of the old head, or your lawn will have dry spots or overwatered areas.
  • Turn the water back on and check that the new head sprays in the right direction and distance before you leave it.

Identify which type of sprinkler head you have

Walk to the head you want to replace and look at its shape. Pop-up spray heads are short and rectangular, usually 2 to 3 inches tall when they pop up. They spray water in a fixed pattern — full circle, half circle, or quarter circle — and cover a small area, typically 4 to 8 feet in radius. These are the most common type in residential lawns.

Rotor heads are taller and have a single nozzle on top that slowly rotates back and forth. They cover a larger area, usually 15 to 50 feet in radius, and are often used in bigger yards or commercial spaces. Drip heads and micro-sprinklers are small, low-profile, and sit just above ground level. They deliver water slowly and are used in flower beds, vegetable gardens, or areas where you want to avoid overspray.

Write down the brand name and model number if you can see them on the head itself. This makes it much easier to find an exact replacement. If the label is worn away, take a photo and bring it to the hardware store — staff can usually match it by appearance.

Turn off the water before you start

Locate the main water shut-off valve for your irrigation system. This is usually a ball valve near the backflow preventer (a brass or plastic device where the irrigation line enters your house or meter). Turn the handle a quarter turn so it is perpendicular to the pipe — this closes the valve and stops water flow to the entire system.

If your system has zone valves (separate valves for different sections of the lawn), you can turn off just the zone that contains the head you are replacing. This lets you keep watering other areas while you work. Zone valves are usually located in a valve box — a plastic or metal lid flush with the ground — or mounted on a wall near the backflow preventer.

After you close the valve, turn on a sprinkler head in that zone to release any pressure trapped in the line. This prevents water from spraying out when you unscrew the old head.

Unscrew the old head and remove it

Grip the old sprinkler head firmly with one hand and use your other hand to unscrew the riser — the threaded pipe stub it is attached to. Most heads unscrew by hand, but if it is stuck, use an adjustable wrench or slip-joint pliers to hold the riser steady while you turn the head counterclockwise. Do not use excessive force; if it will not budge after a few tries, spray some penetrating oil (like WD-40) around the threads and wait 10 minutes.

Once the head is loose, unscrew it the rest of the way by hand and set it aside. Look inside the riser opening. You may see a small filter screen or debris. If the opening is clogged with dirt or sand, rinse it out with clean water from a hose or cup. This prevents the new head from clogging when ready.

Install the new sprinkler head

Take your new head and check that the threads on the bottom match the riser threads. They should be the same size and pitch (the spacing of the threads). Screw the new head onto the riser by hand, turning clockwise. Tighten it until it is snug — you should feel resistance, but you should not have to strain. Hand-tight is the correct tightness; overtightening can crack the head or strip the threads.

If the head has an adjustable nozzle or pattern dial, set it now before you turn the water back on. Most pop-up heads have a small screw or dial on top that lets you change the spray pattern from full circle to half or quarter circle. Rotor heads often have a dial at the base to adjust the arc of rotation. Check the instruction sheet that came with the head, or look for a diagram printed on the head itself.

Turn the water back on and test the spray

Go back to the main valve or zone valve and turn it back on. Turn the handle parallel to the pipe so water flows again. Walk back to the new head and watch it spray. It should pop up (if it is a pop-up) and spray water in the direction and pattern you set. The spray should reach the same distance as the old head did, or slightly farther if you chose a higher-radius nozzle.

If the spray is weak or does not reach the edges of the area it should cover, the riser may still have debris inside. Turn the water off, unscrew the head again, and flush the riser with clean water. If the spray is strong but pointed in the wrong direction, most pop-up heads have a small adjustment screw on the nozzle that lets you rotate the pattern slightly. Rotor heads have a dial at the base to set the starting and ending angles of the sweep.

Run the head for 30 seconds to a minute and watch for leaks where the head screws onto the riser. A small drip is normal while the threads are settling, but a steady stream means the head is not tight enough. Turn off the water, tighten the head a quarter turn more, and test again.

Match the spray pattern and radius to your lawn layout

The most common mistake is buying a replacement head with a different spray radius than the original. If the old head covered 6 feet and you install one that covers 12 feet, the area beyond 6 feet will be overwatered and the area between 6 and 12 feet will be dry. Check the old head or its packaging to find the radius specification, then buy a new head with the same radius.

Spray patterns also matter. If the old head was a quarter-circle (covering one corner of the lawn), buy a quarter-circle replacement, not a full-circle. Hardware stores and online retailers organize sprinkler heads by type and radius, so you can filter by both to find the right match. If you cannot find an exact match, ask a staff member or check the manufacturer's website.

When to call a professional

If the riser itself is cracked, leaking, or broken below ground, you will need to dig and replace the riser, not just the head. This is a job for an irrigation contractor. Similarly, if you turn the water back on and water sprays from the ground around the riser instead of from the head, the riser connection may be damaged. Do not try to force a tighter fit; call a professional to assess the damage.

If you have a smart irrigation controller or a system with multiple zones and you are unsure which zone controls which head, ask a contractor or the original installer to walk you through it before you start. Turning off the wrong zone can leave part of your lawn unwatered for days.

Frequently Asked Questions

Can I replace a pop-up head with a rotor head?

Yes, but only if the riser threads are the same size. A rotor head is taller and heavier, so it may stick up noticeably higher than the surrounding lawn. It also covers a much larger area, so your spray pattern will change. Make sure the new head does not spray onto your driveway, patio, or neighbor's yard before you commit to the swap.

What if the new head leaks where it screws on?

Turn off the water and tighten the head another quarter turn. If it still leaks, unscrew it and wrap the riser threads with plumber's tape (also called PTFE tape) — wrap it three times clockwise, then screw the head back on. This fills small gaps in the threads and stops the leak.

How do I know what radius to buy?

Look at the old head or its packaging for a number like "6x" or "15 ft." This is the radius. If you cannot find it, measure from the head to where the water landed when it was running. Buy a replacement with the same radius, or slightly larger if you want to extend coverage.

Do I need to dig to replace a sprinkler head?

No. The head screws onto a riser that is already installed underground. You only unscrew the head itself, which sits above ground. Digging is only necessary if the riser is damaged or if you want to move the head to a different location.

What if I cannot unscrew the old head by hand?

Use an adjustable wrench or pliers to hold the riser steady while you turn the head counterclockwise. If it is still stuck, spray penetrating oil around the threads, wait 10 minutes, and try again. Avoid using a pipe wrench, which can damage the riser.