Repair is cheaper than replacement in the large majority of cases, because the expensive part of an irrigation system — the buried pipe — is also the part that lasts longest. Replacement starts to make sense when the system was badly designed rather than merely worn, when coverage no longer matches the landscape, or when repairs have become an annual event across multiple zones. Age alone is a poor reason to replace a system.
What actually wears out, and what does not
Read that table and the logic becomes clear. Everything cheap is replaceable, and the one thing that is genuinely expensive to replace is also the thing least likely to need it. A thirty-year-old system with sound pipe is usually a candidate for a thorough overhaul of its cheap components, not a teardown.
| Component | How it ages | Replacement burden |
|---|---|---|
| Buried lateral and mainline pipe | Can last decades if undisturbed | Highest cost to replace — it is why replacement is expensive |
| Valves | Internals wear; bodies last much longer | Low — usually rebuilt in place |
| Solenoids | Electrical parts that eventually fail | Low |
| Sprinkler heads and nozzles | Seals wear, nozzles clog, bodies get damaged | Low, and replaced piecemeal |
| Wiring and splices | Splices fail long before wire does | Low to moderate, depending on locating |
| Controller | Electronics and transformers fail | Low — a straightforward swap |
| Zone design and coverage | Does not wear — it becomes wrong as the landscape changes | Varies; often correctable without replacement |
When replacement genuinely makes more sense
Notice that four of those five are about design and history, not age. That is the real test: is this system worn, or is it wrong? Worn systems are repaired. Wrong systems get rebuilt, and often only in part.
- The system was poorly designed from the start — zones without head-to-head coverage, mixed head types on one zone, or zones asking for more flow than the supply can deliver. No amount of repair fixes a design fault.
- The landscape has changed so completely that the pipe is in the wrong places. A yard rebuilt around a pool, an addition or twenty years of tree growth may need new zones rather than repaired ones.
- Pipe failures are recurring across multiple zones rather than in one spot, which suggests the pipe itself, the installation depth, or ground movement rather than bad luck.
- Repairs have become annual and are spread across the whole system rather than concentrated in one aging manifold.
- The system is a patchwork of previous repairs made with mismatched fittings and unsealed splices, to the point where diagnosing anything costs more than it should.
Want this looked at rather than read about?
Diagnostic-first visits across North Georgia. Call 770.335.8595 or request service — you get an estimate before any work begins.
The middle option most people are not offered
Between "fix this valve" and "replace everything" there is a third course that suits a lot of older North Georgia systems: keep the pipe, renew everything else. That means a full inspection, rebuilding or replacing the valves that are due, replacing worn heads and correcting their alignment, re-nozzling zones to restore uniform coverage, redoing bad legacy splices with direct-burial connectors, and fitting a controller that can actually be scheduled sensibly.
That is a real project with a real cost, but it is a fraction of replacement and it addresses the things that were actually making the system perform badly. It also gives you a documented system — valve locations recorded, zones mapped — which makes every future repair cheaper.
How to get an honest answer
Start with a zone-by-zone inspection rather than a replacement quote. An inspection runs every zone, tests every station electrically, checks coverage and looks for leaks, and it produces a prioritised list: what is broken now, what is going to break, and what is merely suboptimal. With that list in hand the repair-versus-replace question usually answers itself, and you are deciding with information rather than with a sales pitch.
Irrigation Medics bills $125 for the first hour on site and $80 per hour after, and an inspection is charged as that time. As a general North Georgia market figure, a full zone-by-zone check commonly runs roughly $95 to $225 depending on system size — a market estimate, not a quote.
Related answers
- How Often Should an Irrigation System Be Inspected?A full zone-by-zone inspection once a year, at spring startup, suits most residential systems, with a mid-season walkthrough on larger or more…
- How Long Do Irrigation Valves Last?An irrigation valve body commonly lasts decades, because it is inert plastic with no moving parts. What wears out is the rubber diaphragm and the…
- How Long Do Sprinkler Heads Last?Sprinkler heads have no fixed service life, because most of them are replaced for damage or wear rather than for age. The parts that degrade are the…
- Should I Replace My Old Irrigation Controller?Replace an old controller when it has a fault that cannot be repaired, when it has fewer stations than your system needs, or when it lacks scheduling…
Services that fix this
Irrigation System Inspection
Every zone run, every head watched, every fault written down — before it becomes an expensive repair.
Read more →Irrigation Repair
Diagnostic-first repair for residential and commercial sprinkler systems across Hall County, Gwinnett County, North Fult
Read more →Irrigation Maintenance
Spring startup, seasonal adjustment and winterization — the work that stops repairs from happening.
Read more →Where we work
Irrigation Medics repairs irrigation systems across Hall County and the Lake Lanier communities, the Gwinnett corridor through Duluth, Suwanee and Buford, and North Fulton and Forsyth — Johns Creek, Alpharetta, Milton, Roswell and Cumming. Same rates throughout. See the service area.