Sprinkler Repair in Fort Worth: A Homeowner’s Guide to the Most Common Problems

A sprinkler system is a set of parts that all have to work together: a water supply, a backflow preventer, valves, pipe, heads, wiring and a controller. When one piece fails, the symptom often shows up somewhere else. A dry patch in the back yard might be a clogged nozzle, a cracked pipe, a weak valve or a controller that skipped a cycle. This guide walks through the problems we see most often in Fort Worth yards, what each one looks like, and how to narrow down the cause before you start replacing parts.

How a Residential Sprinkler System Is Laid Out

Most Fort Worth systems follow the same basic layout. Water leaves the city meter, passes an isolation valve, and goes through a backflow prevention assembly that keeps irrigation water from flowing back into the drinking water supply. From there a mainline runs under pressure to a group of zone valves. Each valve feeds one zone of lateral pipe and sprinkler heads. The controller in the garage sends a low-voltage signal to each valve in turn, opening it for a set number of minutes.

Knowing that layout makes troubleshooting much easier. If every zone has a problem, look at the parts every zone shares: the water supply, the backflow preventer, the mainline or the controller. If only one zone has a problem, look at that zone’s valve, wiring, lateral pipe and heads. Our zone-by-zone system check explains how to run through each zone and write down what you see.

Broken and Damaged Sprinkler Heads

Heads are the most exposed part of the system, so they break the most. Mowers clip them, cars roll over the ones near the curb, and edgers cut into the ones along beds and walks. A broken head usually shows up as a gusher of water, a head that will not pop up, or a head that sprays in a strange pattern.

Other head problems are less obvious:

• Sunken heads sit too low in the grass, so the spray hits the turf right around them instead of reaching the lawn.
• Tilted heads throw water at an angle, leaving one side dry and soaking the other.
• Clogged nozzles spray a weak or uneven pattern because grit is caught in the screen.
• Misaligned heads water the driveway, the street or the side of the house.

Most of these are simple repairs. We cover the details in our guide to sprinkler head repair.

Leaks in the Pipe

Leaks are harder to spot because the pipe is underground. On Fort Worth clay, a slow leak may not surface for days, and when it does, the wet spot is not always right above the break. Common signs include a soggy area that never dries, a sunken patch of lawn, water running down the curb when the system is off, a head that never builds full pressure, or a water bill that climbs with no change in your habits.

Leaks on the mainline are more serious than leaks on a lateral line, because the mainline stays under pressure all the time. A mainline leak wastes water around the clock, while a lateral leak only runs when that zone is on. Our article on signs of a hidden sprinkler leak goes through what to look for.

Valves That Stick Open or Will Not Open

Zone valves open and close thousands of times over their life. The rubber diaphragm inside wears out, small bits of debris get caught in the seat, and solenoids fail. A valve that will not close keeps watering after the controller shuts off. A valve that will not open leaves one zone dry while the others run normally.

A stuck-open valve needs attention right away, because it can run water all night and create a large bill. The fastest way to stop it is to shut off the isolation valve for the irrigation system until the valve is repaired. Our guide to sprinkler valve repair explains how valves work and what usually goes wrong.

Controller and Wiring Problems

Controller problems can look like almost anything else. A controller with a dead backup battery may lose its program after a power outage. One with a failing transformer may show a blank screen. A controller that is programmed for more than two days a week will cause trouble under Fort Worth’s watering rules, even if the hardware works perfectly.

Wiring problems are common after landscaping work, fence installation or new patios. A cut wire usually takes out one zone. A damaged common wire can take out several zones at once. A multimeter can tell you a lot about what is happening at the valve end of the wire.

Freeze Damage

North Texas does not freeze often, but when it does, exposed parts of the system take the hit. The backflow preventer sits above ground and is the most likely part to crack. Pipes that run shallow near the surface, and parts that were never drained, can split as well. Freeze damage often does not show until the system is turned back on in spring, when a burst fitting starts spraying. See our article on freeze damage after a hard freeze for what to check.

Coverage Problems That Are Not Really Broken Parts

Some dry spots are not caused by broken equipment. They come from the way the system was designed or changed over time. Common causes include:

1. Heads spaced too far apart, so the spray from one head does not reach the next.
2. Spray heads and rotors mixed on the same zone, so one area gets far more water than another.
3. Shrubs and trees that have grown up and now block the spray.
4. Too many heads added to one zone over the years, which drops the pressure for all of them.

These problems usually call for adjustments or small redesigns rather than straight part replacement.

Fort Worth Rules That Affect Repairs

Fort Worth has year-round outdoor watering rules. Irrigation systems may run only on assigned days, twice a week, and never between 10 a.m. and 6 p.m. The city also treats broken, missing or misaligned heads and runoff into the street as water waste. That means a broken head is not just a lawn problem; it can lead to a violation. Our guide to Fort Worth’s twice-a-week watering schedule explains the assigned days.

Certain repairs also need a licensed irrigator or plumber and a city permit, such as installing or replacing a backflow preventer or adding new zones. Simple jobs like replacing a head or cleaning a nozzle do not.

When to Call for Help

You can handle many small problems yourself: cleaning a nozzle, straightening a head, or resetting a controller. It makes sense to call a technician when a leak is underground and you cannot find it, a valve will not shut off, several zones fail at once, the backflow preventer is leaking, or the controller wiring is damaged. Our sprinkler repair service covers all of these, and you can see the full list on our services page.