How long does a sprinkler system last?
Updated August 2026
An in-ground irrigation system lasts 20–30 years, but that number hides how unevenly the parts wear. The buried PVC or poly mains can run 30 years or more untouched, while the spray heads, rotors, and solenoid valves are the workhorses that fail first, usually at 10–15 years. The controller lands in the same 10–15 window before its board or transformer gives out. What decides whether you reach the top of the range is one seasonal chore in cold climates: winterizing. Water left in the lines when it freezes cracks fittings and heads, and hard water slowly clogs nozzles no matter where you live.
Lifespan by type and situation
| Type or situation | Typical lifespan | Why |
|---|---|---|
| Buried mainlines (PVC/poly) | 30+ years | Underground and protected; rarely the reason a system dies |
| Spray heads and rotors | 10–15 years | Sun, mowing, and grit wear the seals and gears |
| Solenoid valves | 10–15 years | Diaphragms harden and stick; often rebuildable with a $10–20 kit |
| Controller / timer | 10–15 years | Boards and transformers fail; smart models add Wi-Fi that ages faster |
| Backflow preventer | 10–20 years | Springs and seals wear; code often requires an annual test |
| Skipped winterizing (cold climate) | Cut years off | A single hard freeze can split heads and valve bodies |
Signs yours is near the end
- Heads that no longer pop up fully, spray sideways, or leave dry brown patches in the lawn
- Zones that will not shut off, or a valve that weeps at the box long after the cycle ends
- A controller that skips programmed start times, forgets settings, or clicks without opening valves
- Geysers or soggy spots over the lines, a sign a fitting or pipe has cracked underground
- Water pressure that has dropped across every zone, hinting at scale or a slow leak
How to add years
Winterizing is the single habit that separates a 15-year system from a 30-year one. In any climate with a hard freeze, blowing the lines out with compressed air each fall keeps water from expanding and splitting heads, valves, and fittings; skipping it is the fastest way to a repair bill, as the cost of skipping winterization lays out. A spring test of every zone catches clogged nozzles and stuck valves before they starve the lawn, and the full maintenance checklist keeps heads clean and aligned. If heads stop popping up, treat it as an early warning rather than a cosmetic nuisance.
What it costs to replace: plan on $3,000–6,000 for a new system. Replacing on your own schedule, before it fails, is almost always cheaper than the emergency version. The home maintenance cost calculator helps you set the money aside before it comes due.
OnOtto tracks your sprinkler winterizations age and service history, and warns you before end of life instead of after the flood.
Track your home's systems, free for 30 daysFrequently asked questions
How much does it cost to fix a sprinkler system versus replace it?
Individual repairs are cheap next to the whole system. A replacement spray head runs $5–20 in parts, a rotor $15–40, and a solenoid valve $15–35, with a pro charging $75–150 per hour of labor on top. A new controller is $100–300. A full system replacement is where the money is, at $3,000–6,000. Because the buried pipe usually survives, most homeowners repair components for decades and only replace the whole system after a freeze wrecks the lines or the layout no longer fits the yard.
Do I really need to winterize my sprinklers every year?
In any region that sees a hard freeze, yes, every single fall. Water trapped in the heads, valves, and shallow pipe expands as it freezes and cracks the plastic, and a single missed season can turn a working system into a spring full of geysers. A pro blowout costs $75–150; a cracked manifold or backflow assembly costs several times that. In frost-free zones like coastal California or south Florida you can skip it, but everywhere else it is the cheapest insurance you buy all year.
How long do sprinkler heads last?
Spray heads and rotors typically last 10–15 years, far less than the 20–30 years of the buried system they feed. Sunlight makes the plastic brittle, lawnmower wheels crack the caps, and grit in the water wears the wiper seals until they weep. Rotors have gears that eventually strip and stop turning. At $5–40 a head, they are a routine replacement, not a system failure. Swapping a tired head takes a few minutes and restores even coverage to the patches of lawn that were browning out.