Hidden leaks
El Cajon Sprinklers: Irrigation Leak Detection in El Cajon
The bill went up, the meter keeps turning, and the yard looks exactly the same as it did last month.
- El Cajon and East County9 nearby communities, all within 20 miles
- Licensed, insured local contractorsWe work with them; check any license at cslb.ca.gov
- Written price firstTypical ranges published on every service page
- Calls answeredMonday to Saturday, 7am to 6pm
El Cajon Sprinklers arranges irrigation leak detection in El Cajon and East County through local irrigation contractors. Some sprinkler leaks announce themselves with a geyser. Others drain quietly into the soil, and the first sign is a water bill that does not match how you water. Finding those takes a method, not a guess.
Finding a hidden leak typically costs $100 to $400; a leak left running feeds a wet patch that keeps spreading until the fix is a $150 to $400 line repair plus whatever the water has undermined.
$100 to $400 to find and fix most leaks
Irrigation leak detection and the repair that follows typically fall within the general sprinkler repair range of $100 to $400 in El Cajon (HomeGuide, February 2026), with labor at $50 to $100 an hour. A leak isolated to one zone is quick to find; a mainline leak under hardscape takes longer.
Get a price: (619) 361-7869Signs of a hidden irrigation leak
- The water bill climbed with no change in watering
- The meter's low-flow indicator spins with every tap and zone off
- One area of the yard stays greener than the rest
- A patch that is soft underfoot days after watering
- Algae or a wet stain at the base of a wall or curb
- The valve box has standing water in it
The meter test, before anyone comes out
- Turn off every tap, appliance and the irrigation controller
- Find the water meter, usually in a box near the street, and watch the small low-flow indicator
- If it is still moving, close the irrigation shutoff valve and watch again
- If it stops, the leak is on the irrigation side; if it keeps moving, it is in the house plumbing
That one test tells you whether you need an irrigation contractor or a plumber, and it is the first thing a contractor will ask about.
How a contractor narrows it down
With the irrigation side confirmed, a mainline leak shows up with every zone off, because the mainline holds pressure all day. A lateral leak shows up only when its zone runs. Running each zone in turn and watching the meter, the heads and the ground narrows it to a zone, and then to a stretch of pipe. A valve that does not fully seal is a common culprit and is checked first; see valve repair.
Water running where it should not? Describe what you see and get a price range on the phone.
Call (619) 361-7869Why leaks hide here
The USDA soil survey maps central El Cajon as about 13 inches of sandy loam over a dense clay subsoil. Water from a small leak drains quickly through the sandy layer, then spreads sideways along the top of the clay instead of surfacing. The wet patch can show up feet away from the break, or not at all. On the Diablo clay mapped in Lemon Grove and Spring Valley, the opposite happens: water cannot drain, so a leak surfaces as a soft, soggy patch close to the source.
The water supplier's side of it
Helix Water District's drought regulations set leak repair deadlines that tighten with each drought level, from 5 days at Level 1 to 72 hours at Level 3. Helix is at Level 0 today, but every supplier here prohibits runoff at all times, and a leak that reaches the street is runoff.
Meter still moving?
Close the irrigation shutoff if the test pointed at it, and call with what you saw. The meter test result saves time on the visit.
Call (619) 361-7869Leak detection questions
How much does irrigation leak detection cost in El Cajon?
Finding and fixing most irrigation leaks falls in the $100 to $400 range, with labor at $50 to $100 an hour. Leaks under hardscape take longer.
How do I know if my sprinkler system is leaking?
Turn off every tap and the controller and watch the meter's low-flow indicator. If it stops when you close the irrigation shutoff, the leak is on the irrigation side.
What are the signs of an underground sprinkler leak?
A higher bill, a meter that keeps moving, a patch greener or softer than the rest, and standing water in the valve box.
Can a sprinkler valve leak when the system is off?
Yes. A valve that does not seal lets water weep through to the lowest heads. It is one of the first things checked.
Who fixes the leak, a plumber or an irrigation contractor?
If closing the irrigation shutoff stops the meter, an irrigation contractor. If the meter keeps moving, the leak is in the house plumbing.
Often done together
- Irrigation line repairA wet spot that never dries, a sinkhole in the lawn, or water rising out of the ground with every zone off.
- Sprinkler valve repairA zone that runs all night, a valve box full of water, a solenoid that clicks and does nothing.
- El Cajon Sprinklers: Sprinkler Repair in Lemon GroveSmall lots on heavy clay, where the fix is usually slower water rather than more of it.
Tell us which zone is acting up
Say what you are seeing (a geyser, a dry patch, a zone that will not shut off, a timer that went blank) and roughly how big the yard is. You will hear what the fix usually involves and what it tends to cost before anyone comes out.
Call (619) 361-7869