Why won't my sprinkler heads pop up?

What 'heads not popping' actually means

A pop-up sprinkler head rises because water pressure pushes the riser up against a spring. When the head stays flat, the water either isn't getting there or isn't arriving with enough force.

So the real question is always the same: is this one head or the whole zone?

One head down while the rest of the zone works points at that specific head, usually a clog or a worn riser seal. The fix is cheap and fast.

The whole zone flat points upstream at the valve, the supply, or the zone's flow capacity. That's where the bigger money hides.

Figure out which situation you have before you spend a dime. It changes everything about where you look.

The usual suspects, in order

Most no-pop calls trace back to a handful of causes, and they're not all equal.

At the top of the list is the zone valve. A solenoid that clicks but doesn't lift the diaphragm will kill the whole zone. You'll hear the click, but the heads just sit there.

Right behind it is pressure. If your backflow ball valves got left half-closed after winterizing, or a supply valve near the meter isn't all the way open, every zone suffers.

Then there's the sneaky one: too many heads on the line. Systems get expanded over the years, and eventually a zone that used to work fine can't push enough flow to raise all its heads.

For a single dead head, it's almost always dirt in the riser or a clogged filter screen at the base.

Broken lateral pipe and controller wiring faults round out the list. Less common, but they do happen, especially after a freeze or a rodent chews through buried wire.

How to diagnose it step by step

Work from the water source outward. It's faster than randomly digging up heads.

First, confirm your supply is fully open. Find the backflow preventer (usually a brass assembly above ground near the house or in a box) and check that both ball valve handles run inline with the pipe. That means open.

Next, run the problem zone from the controller and go stand at the valve box. If you hear a distinct click, the controller is energizing the solenoid. Good sign.

If nothing pops, try opening the valve manually. Turn the solenoid (the black cylinder with two wires) about a quarter turn counterclockwise. If the heads suddenly rise, the valve body is fine and your problem is electrical.

If the heads still won't rise with the valve manually open, the issue is downstream: pressure, flow, a clog, or a broken pipe.

Walk the whole zone while it runs. Look for wet spots, bubbling soil, or a geyser. That's a broken lateral.

If everything looks dry and the heads still won't rise, count them. An overloaded zone is a real possibility, especially on older or expanded systems.

For a single stubborn head, unscrew the cap, pull the internal assembly, and rinse the filter screen. Grit is the number one villain.

• Backflow valves fully open? Handles inline with pipe.
• Solenoid clicks on? Controller is doing its job.
• Manual valve open works? Problem is electrical.
• Wet spots when running? Broken lateral.
• One head only? Clean the filter screen first.

What it costs in 2026

The spread here is wide because the causes are so different.

DIY on a clogged or stuck head runs $6 to $15 for a replacement head, or nothing if cleaning the screen does the trick.

A replacement solenoid is $12 to $25. A valve diaphragm rebuild kit is $10 to $20. Both are DIY-friendly if you can find and open the valve.

A whole replacement valve body runs $20 to $45 in parts, plus your afternoon.

Bring in a pro and you're looking at $200–$1200 for typical no-pop diagnosis and repair. That usually covers a service call, valve replacement or wiring repair, and some digging.

The cost jumps when a broken lateral means trenching, or when a dead zone traces to a buried wire fault that needs a fault locator to trace. Wire tracing alone can add $150 to $300.

DIY or call a pro?

A lot of this is genuinely DIY. Cleaning a head, swapping a head, replacing a solenoid, and rebuilding a valve diaphragm are all within reach for most homeowners with basic tools.

Opening a valve manually to test it takes zero tools and tells you a ton.

Where I draw the line: anything involving the backflow preventer beyond opening and closing its ball valves. That device protects your drinking water, and in many areas it legally requires a certified tester to service.

Underground wire faults are the other pro job. Without a fault locator you'll be digging blind, and that gets expensive in wasted time and torn-up lawn.

Splitting an overloaded zone into two is also pro territory unless you've done irrigation plumbing before. New valve, new wiring, new piping, and it has to be sized right or you're back where you started.

• DIY: cleaning heads, swapping heads, solenoids, diaphragm kits, checking supply valves
• Pro: backflow service, underground wire tracing, splitting zones, deep pipe breaks

Can this wait?

It depends on the season and the cause.

In cool spring weather with rain in the forecast, a dead zone can wait a week or two while you sort it out. Nothing's dying fast.

In peak summer, a flat zone means brown grass in about 10 to 14 days, sometimes faster on sandy soil or south-facing slopes. That's when I'd move quickly.

A broken lateral or a stuck-open valve can't wait at all. Both waste water continuously, and a leak under the soil can undermine walkways or foundations over time.

This symptom carries a high urgency rating for a reason: even when the plants can wait, the water bill often can't.

When this tends to show up

Timing is a clue. Most no-pop problems cluster around a few points in the year.

Spring startup is the big one. Valves left dry all winter can stick, and any freeze crack in a line or valve body reveals itself the first time you pressurize.

It's also easy to leave backflow valves half-closed after winterizing, then wonder why nothing pops in April.

Midsummer brings pressure-related failures. City water demand peaks in July and August, and a zone that was always marginal finally can't lift its heads on a hot afternoon.

Fall failures usually come from physical damage: aerating, edging, planting, or fence work that nicks a lateral line.

How we approach this

This guide reflects how a field tech actually troubleshoots a no-pop zone: start at the water source, work outward, and rule out the cheap causes before touching the expensive ones.

Cost ranges are 2026 US estimates for parts and typical service calls. Your region, water rates, and how much digging is involved will move the numbers.

The DIY boundaries here aren't about gatekeeping. They're about the two areas (backflow devices and buried wire) where the wrong move costs more than the repair itself.

When in doubt, do the free diagnostics first: check the supply, listen for the click, try the manual valve. Those three steps sort most no-pop problems into the right bucket.