Repair guide · Heads

How to repair a sprinkler head

The sprinkler head is the only part of an irrigation system that lives where mowers, edgers, car tires, and dogs can reach it — which is why head replacement is the most common repair in our truck. It's also the most DIY-friendly repair there is, as long as you match the part and set it correctly. Here's the way I do it on paid calls, including the part most guides skip: figuring out why the head failed, so the new one survives.

First, name the failure

Cracked or decapitated body: mower or edger strike. Replace the head — and read the grade section below, because the strike happened for a reason.

Head won't pop up, or won't retract: grit in the wiper seal or a worn spring. Sometimes a rinse saves it; usually on a 20-year-old head, replacement is the honest answer.

Geyser when the zone runs: the nozzle or the whole top blew off, or the riser/fitting below ground let go. If water erupts from the soil next to the head, you've got a fitting break — that's a line repair, not a head repair.

Fine mist instead of droplets: the head isn't broken — your zone pressure is too high, atomizing the spray. Swap to pressure-regulated heads or fix the regulator; replacing the head changes nothing.

Dry wedge in the lawn: clogged nozzle or an arc knocked out of adjustment. Clean and re-aim before you buy anything.

Match what you have

Two families: spray heads (pop up, fixed fan of water, 8–15 ft) and rotors (single rotating stream, 20–40 ft). Never mix them on one zone — they put down water at wildly different rates, and a mixed zone is doomed to simultaneous puddles and dry spots. Match the pop-up height too: 4-inch is standard for turf; shrub beds often use 6- or 12-inch. Brand-mixing bodies is usually fine; nozzles are where matching matters — see our Rain Bird–specific guide for the brand we see most.

Tools and parts

Step-by-step replacement

1. Mark it while it runs. Run the zone, flag the bad head, then shut the zone off. Finding a retracted head in turf without a flag is archaeology.
2. Cut a collar. Trowel out a 6-inch ring of turf around the head, deep enough to expose the body down to the riser connection. Set the plug aside intact.
3. Unscrew counterclockwise by hand, keeping soil out of the open riser — stuff a rag in it the moment the head is off. Dirt in the line becomes a clogged nozzle on day one.
4. Thread the new head on hand-tight plus a quarter turn. Cross-threading plastic is the classic rookie kill; if it doesn't spin freely for the first turns, back off and restart.
5. Flush before the nozzle goes on. Run the zone for ten seconds with the new head capless to blow out debris, then install the nozzle and screen.
6. Set to grade and aim. Top of the cap flush with the soil — not the grass blades, the soil — then adjust the arc so spray reaches the neighboring heads (that's head-to-head coverage, and it's intentional).

Why the same head keeps dying

Too high: a head proud of grade loses its fight with the mower every single week. Set it flush, or use a shorter riser.

Too low / sunken: North Texas clay swallows heads over the years; the pop-up can't clear the turf, the spray hits grass blades, and the lawn browns in arcs. Excavate and raise the riser — a five-minute job that fixes a “mystery” dry spot.

Edge-of-concrete placement: heads beside driveways take edger hits forever. A swing-pipe connection lets the head give instead of snap.

When to have a licensed irrigator do it

One head, easy access, matched part: do it yourself with confidence. Call us when the head keeps failing (the cause is below ground or in the design), when a whole zone is weak, when you need nozzles re-matched across a zone, or when the “head” problem turns out to be a riser snapped off inside the fitting — extracting a broken nipple without wrecking the tee is its own skill. Flat rate quoted before any work begins: sprinkler head repair & replacement.