Water at a sprinkler head when the zone is off is a different problem than water at a sprinkler head when the zone is on. Texas homeowners mix those two and replace the can. If the leak is constant, you are paying for irrigation 24 hours a day and the meter will prove it.
This guide is written for Texas systems — Fort Bend clay with high water tables near bayous in Sugar Land, freeze risk in Frisco, watering rules from City of Sugar Land. It is not a national blog with the city name swapped in. If the hardware is already failing, skip to leak detection & repair or call 888-427-5022.
What a leaking sprinkler head actually looks like on a Texas lawn
A puddle at dawn with the clock off. A head that hisses after the zone should have drained. A meter that ticks with every indoor fixture shut. Green, soggy turf in one circle while the rest of the lawn looks normal.
In Sugar Land the same symptom often traces to valve boxes in beds and smart-controller retrofits. In Frisco we see more freeze and heave. In San Antonio (SAWS) the program may be legal but the heads are wrong. Do not assume the YouTube fix matches City of Sugar Land pressure.
Diagnose before you buy parts
Order of operations matters. Controller and rain sensor first, then the valve box, then heads with water on, then a shovel. Skipping steps is how people replace nozzles when the solenoid is open, or trench for a “root problem” when station 4 is dead at the clock.
- With the controller off, watch the meter for 10 minutes. Movement is a leak path, not dew.
- Feel the head. Constant pressure at the nozzle with the zone off means the valve is not seating.
- If only one head weeps after a cycle, the check valve in the body may have failed — that is a head part.
- If a whole zone weeps, open the valve box. A diaphragm tear feeds all heads on that station.
- Probe beside the can. Water from the side is a lateral, not a nozzle.
Keep a notepad of zone numbers. The FAQ covers the phone questions we ask so the truck shows up with the right fittings.
Parts that actually last in this climate
Check-valve pop-up bodies stop low-head drainage on sloped lots in Boerne, Lakeway, and west Austin. They do nothing for a valve that will not close. Do not use thread tape as a substitute for a new swing joint.
We use matched-precipitation nozzles when we change a head, and we flush grit after a pipe cut so the next screen does not pack. Brand-specific notes live in the blog as well — start with Sprinkler Zone Not Turning On, Sprinkler Zone Won’t Shut Off, Low Sprinkler Water Pressure.
What it costs in Texas (ranges, not bait)
A check-valve head is a small part. A valve rebuild is a mid-range visit. A mainline leak that surfaces at a head because water followed the pipe is the expensive one — isolation first.
A written quote before work is the rule. See Leak Detection & Repair for what a typical visit includes, and the full service list if more than one system is involved.
DIY vs calling a licensed irrigator
You can replace a body that drains after a cycle on a slope. You should not guess on a constant leak with a spinning meter. Shut the irrigation isolation valve if you have one and call.
Texas licenses landscape irrigators for a reason: backflow, buried electric, and municipal rules. If you are in Sugar Land, Frisco, or San Antonio, start on the city page — Sugar Land, Frisco, San Antonio — then book.
Mistakes that turn a one-hour job into a weekend
- Replacing heads on a zone whose valve is stuck open.
- Assuming dawn puddles are “the system draining” for days on end.
- Turning the controller off and thinking that stops a hydraulic leak. It does not.
How this ties to other repairs
Constant leaks belong with leak detection and valve work. After-cycle drainage on a hill belongs with check-valve heads and pressure regulation.
Coverage problems after a “fix” usually mean the program was never updated. Pair mechanical work with controller programming and, on clay, cycle-and-soak — not a longer single runtime.
What a good visit looks like on our trucks
We do not start with a parts cannon. Controller and sensor, then the box, then water-on, then dirt if the lateral is the problem. That order is how you avoid replacing a clock for a cut wire, or trenching a puddle that is eight feet from the break. If you want the short phone version, the FAQ is enough. If you want the long version, you are already in it.
Texas jobs change by metro even when the part number does not. Sugar Land clay hides water. Frisco actually freezes brass. San Antonio bills you through a different utility window. A national blog that only swaps the city name is how Google ends up indexing one page. We write the local constraint in the article because it changes the repair.
Bring zone numbers, whether the problem is new or slow, whether anyone dug recently, and whether the meter moves when everything should be off. Those four answers route the call — leak truck vs simple head work vs controller power path. Book on contact or call 888-427-5022.
Frequently asked
The leak stopped when I shut the clock off.
Then it was a program or a station stuck on electrically. If it continues, the valve is hydraulic.
Will a rain sensor stop a leak?
No. Rain sensors stop programs. They do not close a torn diaphragm.
Need it fixed, not diagnosed over email? Call 888-427-5022 or use the contact page. Same-day windows are for active leaks and stuck-on valves. Everything else we schedule on emergency vs standard priority.
Texas context we will not skip
Gulf clay, Blackland prairie, and Edwards rock do not share a repair script. A wet spot in Houston is not a freeze crack in Dallas, and a SAWS stage day is not a MUD watering window in Katy. We write those constraints because they change the parts on the truck and the program we leave on the clock.
If this article is about a part, still run isolation before you buy a case of that part. If it is about a city, still open the valve box before you trench the first damp patch. If it is about a clock, still measure the solenoid. That order is the whole business.
Call 888-427-5022. Use the contact page if you need a gate code on the ticket. Hub pages: services, service areas, blog.