Should you repair or replace your sprinkler system?
Updated August 2026
← Every repair-or-replace call
Irrigation problems are repair jobs almost without exception, since heads cost $5–20, valves $20–100, and controllers $100–300 against $2,500–6,000 to install a new system. Replacement earns its keep in only a few cases: buried pipe cracked across several zones, poly fittings failing throughout, or a layout that no longer matches the landscape. Labor is what surprises people, because contractors bill $75–150 per hour and a visit to swap three heads lands around $150–350 all in. Buried PVC and poly mains routinely serve decades, while heads wear out in 5–10 years and valve diaphragms in 10–15, which is why nearly every sprinkler failure is a parts failure.
The short version
Irrigation is one of the few systems where replacement is usually the wrong answer. The buried pipe is expensive to install and the least likely component to fail, so a system on sound mains stays worth repairing year after year: pop-ups at $5–20, rotors at $15–40, valve diaphragms at $10–25, a whole valve at $20–100, a wire splice, or a $100–300 controller. Three situations flip the verdict. Freeze damage that split mains in several zones means excavating the yard anyway, so a redesign costs little extra. A layout built for a landscape you no longer have wastes water on every cycle no matter how many heads you replace. And a system with failing poly fittings throughout becomes a rolling bill.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Head snapped off or spraying sideways | Repair | A $5–20 pop-up, or $15–40 for a rotor, plus 15 minutes |
| One zone will not come on | Repair | A $10–25 diaphragm, a solenoid, or a broken wire splice |
| Zone will not shut off | Repair | Debris under the diaphragm or a stuck solenoid; a $20–100 valve |
| Controller dead or losing its program | Repair | A $100–300 controller, and a smart model trims water use |
| Soggy patch plus weak pressure in one zone | Repair | A cracked lateral; $150–400 to locate and splice |
| Mains split in several zones after a hard freeze | Replace | Trenching across the yard nears the cost of a new system |
| Layout no longer matches the landscape | Replace | Rezoning beats bolting heads onto a design that never fit |
| Backflow preventer cracked or failing its test | Repair now | A $150–500 rebuild or swap; it guards your drinking water |
What each path costs
Repairs typically run $5–300 in parts, plus $75–150 per hour labor; a replacement is $2,500–6,000 installed. Buried mains last decades, heads 5–10 years, and valve diaphragms 10–15. Replace the whole system only after widespread freeze damage or a layout that no longer fits. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
How much does it cost to fix a broken sprinkler head?
The part is trivial and the labor is the bill. A spray body costs $5–20 and a gear-driven rotor $15–40, and the swap takes about 15 minutes with a trowel: unscrew the old body from the fitting, thread the new one on, flush the line, then set the nozzle and arc. A contractor at $75–150 an hour typically replaces several in one visit for $150–350. Walking the zones yourself first, as the zone test guide describes, means paying for one trip instead of three.
Is a smart controller worth replacing a working timer?
Often, and it is the cheapest upgrade on the system. A weather-based or soil-sensing controller costs $100–300, skips cycles after rain, and shortens them in cool weather, which is where most irrigation waste happens. Plenty of water utilities offer rebates that cover part of the price, so check yours before buying. The limit is hydraulic: a smart controller cannot fix misaligned heads or a zone that mixes rotors with sprays. Repair the zone first, then give the controller something worth scheduling.
How bad is freeze damage to an irrigation system?
It ranges from a $20 head to a full excavation. Water left in the lines expands as it freezes and cracks whatever holds it, taking heads and above-ground backflow assemblies first, then laterals, then mains. One or two cracked laterals is a $150–400 repair. Splits across several zones means trenching the yard, and at that point a new system competes on price. Blowing the lines out with compressed air each fall costs $75–150 and prevents nearly all of it, as the winterization cost breakdown shows.
How long should a sprinkler system last before replacement?
The buried portion outlives most owners' patience with the visible parts. Correctly installed PVC and poly mains can run 20–40 years, while heads turn over at 5–10 years, valve diaphragms at 10–15, and controllers roughly every 10. A 25-year-old system is therefore normally a set of replaceable parts sitting on good pipe, not a teardown candidate. Our lifespan guide and the seasonal checklist break the components apart.