A head that won't pop up, sputters, or just dribbles is one of the easiest sprinkler problems to diagnose — and often one of the easiest to fix yourself. It almost always comes down to one of three things.
Why won't my sprinkler head spray?
A head that won't spray is usually one of three things: a clogged nozzle or filter screen (most common, often DIY), a cracked or snapped head from a mower or vehicle, or low pressure in the zone — frequently a valve or a leak upstream.
The quickest way to narrow it down: is it this one head, or the whole zone? A single dead head among healthy ones points to that head — a clog or a crack. A whole zone that's weak points upstream, to pressure. Hold that distinction and the rest is easy.
How do I clean a clogged nozzle?
This is the genuinely DIY fix, and it solves most single-head complaints:
- Run the zone so the head pops up, then grip the riser (the stem) so it stays up — or turn the zone off with it held up.
- Unscrew the nozzle from the top of the riser, and lift out the small filter screen underneath it.
- Rinse the screen and nozzle under a tap — pick grit out of the screen mesh, and clear the nozzle opening. Don't ream it wider with a pin; that changes the spray pattern.
- Reassemble and test. Screen back in, nozzle back on, run the zone. Most trickling heads spray clean again right here.
What if the head is cracked or broken?
Mowers, snow shovels and the occasional tire crack heads off at the riser or split the cap. If it's physically broken, it's a replacement, not a repair. The good news: our head replacement is one flat price for any size or type — 4-inch lawn spray, 6-inch bed spray, or a rotor — so there's no upselling by model. And if you only need a single head capped rather than replaced, that's goodwill on our end, no charge.
What if it's low pressure, not the head?
If the whole zone is weak — every head barely lifting or throwing short — the head isn't your problem. Something upstream is starving the zone of pressure:
- A valve not opening fully, or a worn diaphragm — often paired with water pooling around a head when the system's off.
- A leak or broken pipe on the zone bleeding off pressure before it reaches the heads — see how to find a broken sprinkler pipe.
- Too many heads added to one zone over the years, past what its flow can supply.
Chasing a "bad head" when the real problem is a zone-wide pressure issue is how people waste an afternoon and a box of parts. Check the whole zone first.
When should you call us?
If the nozzle's clean and it still won't spray, if the whole zone is weak, or if you'd rather not hunt it down — that's us. We're same-day across our York Region core in season, and the rest of what we cover is on the sprinkler repair page.
Start with our AI diagnostic tool: if its diagnosis matches the on-site fix, you get one hour of repair labour free.
Frequently asked questions
Why is my sprinkler head not popping up?
Either it's not getting enough pressure to lift (a zone-wide issue — a valve or a leak upstream), or the head itself is clogged or seized. If the other heads on that zone pop up fine, suspect the head; if none of them do, it's pressure.
How do I clean a sprinkler nozzle?
With the head popped up, unscrew the nozzle and lift out the filter screen beneath it. Rinse both under a tap, clear any grit from the screen, then reassemble and test. Avoid widening the nozzle opening with a pin — it changes the spray pattern.
Why is my sprinkler only trickling?
A trickle is usually a partly blocked nozzle or filter screen — clean it first. If cleaning doesn't help and the whole zone trickles, it's low pressure from a valve or a leak upstream rather than the head.
Can I replace a sprinkler head myself?
Yes — unscrew the old one and hand-tighten a matching replacement; don't over-tighten. Match the size and type so the spray pattern stays right. If you're not sure what matches, our head replacement is one flat price for any size or type.