An irrigation system rarely fails all at once. It fails a zone at a time: a brown stripe on the lawn here, a soggy patch there, a controller that runs but a zone that never comes on. This guide covers the failures we see most across Monmouth County, how a proper repair visit works, and the honest framework for repairing versus replacing.
The symptoms that tell you something is wrong
Dry or brown patches in an otherwise healthy lawn. Usually a clogged, tilted, or broken head, or head spacing that never delivered true head-to-head coverage in the first place.
Soggy spots or standing water. A stuck zone valve, a cracked lateral line, or a low-head drainage problem where the lowest head on a zone weeps long after the cycle ends.
One zone will not run (or will not stop). With one zone, suspect the valve's solenoid or diaphragm, or the wire run to it. When several zones misbehave, look at the controller, the common wire, or the master valve.
Weak pressure across a zone. A leak somewhere upstream, a partially closed valve, clogged nozzles, or too many heads added to a zone over the years.
Water leaking from the backflow assembly. One of the most common calls we get. Often it is a test port left open by whoever serviced it last, which is a quick fix, but it should be checked rather than ignored.
A spike in your water bill. Irrigation leaks waste water invisibly, underground, on a schedule. If summer bills jumped and the lawn does not look better for it, the system is a prime suspect.
How a professional diagnosis works
Guessing is expensive. A proper repair visit runs the system zone by zone: verify controller output, check voltage at the valves, watch each zone's heads under pressure, isolate pressure loss to a section of pipe, and only then open the ground. That sequence is why an experienced technician often fixes in one visit what a handyman chases across three.
What drives the cost of a repair
Every property is different, so repairs are quoted after diagnosis rather than from a price list. What moves the number: how many components are involved, whether the fault is electrical or plumbing, how deep and how accessible the pipe is, and whether the backflow assembly is part of the problem. Backflow replacement is the single most expensive common failure, which is exactly why fall winterization matters. Emergency repairs, such as a main-line break flooding a property, are handled as a priority. Call and we will tell you what we are looking at before any work begins.
Repair or replace? The honest framework
Repair usually wins when the system is under roughly 15 years old, the pipe is sound, and failures are isolated: heads, one valve, the controller. Replacement, or a staged renovation, starts to win when several of these are true: the system predates modern pressure-regulated heads, zones were extended past their capacity, pipe repairs keep recurring along the same runs, coverage was never designed for the current landscape, or the controller cannot support the sensors and scheduling that cut water bills. Often the right answer is in between: keep sound pipe in the ground and renovate heads, valves, and the controller. That behaves like a new system for a fraction of the cost. See our upgrades guide.
Any brand, repaired right
We install Hunter systems, and we service every major brand: Rain Bird, Toro, and the rest. If your Rain Bird timer needs a repair, we will source the right part and fix it. When a component has reached the end of its life and needs replacing, we replace it with Hunter. Think of it like a car: we will put your make's tires on it, but when it is time for a new engine, you get the one we trust.
Why licensing matters on repairs, not just installs
New Jersey requires landscape irrigation contractors to be state-certified, and work on the backflow preventer intersects with your water utility's testing requirements. A repair done without the right certification can leave you with documentation problems on top of plumbing ones. Our technicians include certified backflow testers, so compliance paperwork rides along with the fix.
Frequently asked questions
Repairs are quoted after diagnosis, because two systems with the same symptom can have very different causes. We tell you what we found and what it will take before any work begins.
Yes. Most of the systems we repair were installed by someone else. We service all major brands, including Rain Bird and Toro, and we install Hunter.
Most often: a leak on that zone's lateral, a partly failed valve, clogged nozzles, or too many heads for the zone's flow. It is diagnosable in one visit.
Usually the common wire, a failed solenoid, or a master-valve issue. Occasionally it is as simple as a rain sensor holding the system off.
Often it is a test port that was left open by a previous service, which is a quick fix. It should still be checked, because a cracked assembly can look similar.
If the pipe is sound, usually yes. Heads, valves, and controllers are all replaceable. If pipe failures are recurring, ask us about staged renovation instead of piecemeal repairs.