A sprinkler head that leaks while the station is running, spray that is compromised by damaged plastic that is not just a damaged or plugged nozzle may need replacement. Replacing a sprinkler head takes 10 minutes and costs a few dollars. If the sprinkler is leaking all the time 24/7 it is probably a valve problem.
STEP 1: Identify the Problem Head
Run the zone and watch each head. A head that leaks from the base has a cracked body or bad seal. A head that sprays unevenly has a clogged nozzle. A head that does not pop up fully has a stuck riser or damaged spring. Mark the problem head for repair.
STEP 2: Turn Off the System and Dig Around the Head
Now that you have the starting point, shut off the irrigation system at the controller. Dig carefully around the sprinkler head to expose the riser and the fitting that connects it to the supply line. Dig a circle about 6-8 inches around and 6 inches deep.
STEP 3: Unscrew the Old Head
With the basics covered, it is time to twist the sprinkler head counterclockwise to unscrew it from the riser fitting. If the riser turns with it, hold the riser with pliers while unscrewing the head. Be careful not to get dirt into the open riser pipe.
STEP 4: Install the New Head
With the main work complete, wrap Teflon tape around the threads of the new head. Screw it clockwise into the riser fitting and hand-tighten firmly. Do not use pliers on the new head — hand-tight plus a quarter turn is sufficient. Make sure the head is positioned at ground level — too high and it gets hit by mowers, too low and it does not clear the grass.
STEP 5: Test and Adjust the Spray Pattern
To bring everything together and finish strong, turn the zone on and watch the new head. Adjust the spray arc, distance, and direction using the adjustment screw on top of the head (use a flat screwdriver or the key included with the head). Ensure the spray covers the intended area without hitting the house, sidewalk, or street.
PRO TIPS
Q: How do I replace a broken sprinkler head?
A: Keep two or three spare sprinkler heads of the same brand and model in your garage. When a head fails — and they all do eventually — a 10-minute swap is far better than a week of wasted water while you find the right replacement.
Q: Should I flush the sprinkler riser before installing a new head?
A: Flush the riser by briefly turning on the zone before screwing in the new head. This blasts any dirt and debris out of the pipe that would immediately clog the new nozzle. Just shield the open pipe with your hand to direct the spray.
Q: Why do multiple sprinkler heads on one zone have low pressure?
A: If multiple heads on the same zone have low pressure or weak spray, the problem is likely a partially closed zone valve or a leak in the supply line — not the individual heads. Check the valve box before replacing heads unnecessarily.
SUPPLIES NEEDED
Replacement sprinkler head (matching brand and type)
Teflon tape
Small shovel or trowel
Pliers (to hold the riser)
Flat screwdriver for adjustment
Bucket of water to flush dirt
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