24/7 Emergency Leak Detection in Redwood City — Call (650) 632-9185

Irrigation Leak Repair Redwood City, CA

Every summer, the same call comes in: the water bill doubled, the house is dry, and nobody can find a drop of water anywhere. The leak is outside, underground, in the one system that only runs when nobody is watching. Leak Detection Pros provides the irrigation leak repair Redwood City, CA homeowners need — zone-by-zone isolation, the break marked before digging, and the repair scoped to the one section that failed.

✔ Licensed & Insured ✔ Same-Day Service ✔ Locally Owned & Operated Since 2018 ✔ Upfront Pricing

Why Irrigation Leaks Spike Redwood City Bills Every Summer

Irrigation is the top outdoor culprit behind summer bill spikes here because a broken line underground releases water into the soil where it vanishes — the lawn above it may even look greener. One Redwood City resident documented a garden hose left running for two or three days that added roughly $200 to the bill; after setting a usage alert in the city's My Water portal, that same alert caught a broken irrigation line the following season from a backyard puddle, before it could run for months.

That story contains the whole pattern. Irrigation systems age in the ground — PVC laterals get brittle, tree roots find the joints, valves accumulate grit and stop seating fully. Redwood City's mature street trees are a genuine asset and a genuine plumbing hazard: the same root systems that shade Woodside Plaza and Farm Hill work their way into buried lines season after season. And because the system only pressurizes on a schedule, a break can run for an entire season between the bill that looks "a bit high" and the one that makes you call.

Signs the leak is in the yard, not the house:

  • One patch of lawn that is always soggy or noticeably greener than everything around it
  • A puddle that comes back in the same spot a day after watering, in the same place every time
  • One zone with weak, sputtering pressure while the other zones run normally
  • A hissing sound at the valve box or a valve that never fully shuts off
  • Usage in the My Water portal outside your watering schedule — flow at hours the controller should be idle
  • Sinkholes or soft spots along a line's path, where escaping water has washed the soil away
Broken sprinkler line spraying water onto a lawn

The Bill Blends Right In

Summer watering is supposed to cost more — which is exactly why irrigation leaks survive so long. A break hides inside the increase you already expected, and each zone still waters the yard, so nothing looks broken from the patio. The giveaway is in the pattern, not the total: check your hourly usage against your controller schedule in the My Water portal. Flow that does not match the schedule is water going somewhere you did not send it.

How We Track Down an Irrigation Leak

We separate the yard from the house first, then walk the system zone by zone until one run of pipe confesses. No trenching on a hunch — the digging starts after the break is marked.

house valve box main line zone pipe sprinkler heads broken head wet patch
A broken sprinkler head throws a geyser and soaks one patch of lawn while the rest of the zone stays dry.

Split the System at the Meter

With the irrigation branch shut off at its valve, we check whether the meter still moves — that one test divides the world into "house leak" and "yard leak."

Read the Pattern

Your My Water hourly data and the controller schedule tell us which cycles lose water — often narrowing the search to a single zone before we arrive.

Zone-by-Zone Pressure Test

Each zone is run and gauged individually. A zone that cannot hold pressure, or sags compared with its neighbors, holds the break.

Inspect Valves & Manifold

Valve boxes are opened and checked: weeping diaphragms, cracked manifolds and leaking backflow connections are found here more often than in the ground.

Acoustic Pinpoint

For a buried lateral that passes its pressure test nowhere, listening equipment and line tracing mark the break's position on the surface.

Repair & Retest

The failed section is cut out and replaced, the zone is re-pressurized, and the meter is checked again — the repair is proven, not assumed.

Technician testing irrigation valves and controller zones

What Irrigation Leak Detection and Repair Costs

Finding the leak is priced on the same ranges we publish for all our leak detection work in Redwood City — irrigation work gets no special markup for happening outdoors:

ServiceTypical Range
Basic leak inspection$100 – $300
Electronic (acoustic) leak detection$300 – $800
Underground line locating$500 – $1,200

The repair itself is quoted as a range once the break is marked and we can see its depth and access. Most single-break irrigation repairs are small excavation jobs — a section of lateral line or a valve — not landscape projects. And if the isolation test shows the leak is actually in the main line or the house, our water leak detection service picks it up from there with no second diagnosis fee conversation.

Set an Alert and Catch the Next One Early

Here is the part no other company in this market tells you: Redwood City's meters are smart meters, and the My Water portal lets you view hourly usage and set alerts when consumption jumps. The resident in the story above caught their broken irrigation line because an alert fired — weeks before the bill would have told them. The city also partners on a discounted Flume smart water monitor program for residents who want a sensor on the meter itself.

We will happily walk you through setting the alert up while we are on site. A leak caught by an alert in May is a small repair; the same leak caught by a September bill has already cost more than the fix.

Related Services

Yard leaks and house leaks get confused for each other constantly — these are the services on the other side of that line:

Water Leak Detection

If the meter still moves with the irrigation off, the leak is in the house or the main line — this is the service that traces it.

Learn more →

Emergency Leak Repair

A main line or valve that lets go completely is not a slow leak anymore. Shut it down and stop the damage, day or night.

Learn more →

Sewer Leak Detection

Camera inspection for the other underground system — the one carrying water away, with root intrusion of its own.

Learn more →

Irrigation Leak Questions Homeowners Ask Us

How do I know the leak is in my irrigation and not the house?

Timing tells the story. Redwood City's My Water portal shows your usage hour by hour — if the flow spikes only when the irrigation controller runs, the leak is outside. You can confirm at the meter: shut off the irrigation branch at its valve and watch whether the meter's low-flow indicator stops moving while the house supply stays on.

My bill only spikes in summer. Is that a leak or just watering?

Summer watering legitimately raises usage — but a broken lateral line or a valve stuck partly open can double or triple what the watering should cost, and it hides inside the increase you were expecting anyway. Compare your hourly pattern in the My Water portal against your controller schedule: flow outside the scheduled windows, or one zone using far more than the others, means something is broken.

Can you find an irrigation break without digging up the whole yard?

Yes. We isolate zones one at a time, pressure-test each run, and use acoustic listening and line tracing to mark the break before a shovel comes out. Most irrigation repairs open one small section of soil or turf — not a trench across the lawn.

What if the leak is the main line, not a sprinkler?

Then we will find that instead — the same isolation process separates the house supply, the irrigation branch and the main line between the meter and the house. A main line leak is more urgent than a sprinkler break because it runs around the clock, and we will tell you plainly which one you have before quoting anything.

Do you repair valves and controllers too?

We repair the plumbing side of the system — valves that stick or weep, cracked lateral lines, broken risers and heads, and leaking connections at the backflow preventer and manifold. If the problem turns out to be controller programming rather than a leak, we will show you that as well; a system running twice a night looks exactly like a leak on the bill.

How much does irrigation leak repair cost?

Detection follows our standard ranges — a basic inspection typically runs $100–$300, electronic detection $300–$800, and underground locating $500–$1,200 when a line has to be traced. The repair itself is quoted as a range once the break is marked, and most single-break repairs are small excavation jobs, not landscape projects.

Can I use my water meter to check the irrigation system?

Yes — the meter separates the house from the yard. With every fixture inside off, note the meter's low-flow indicator, then run one irrigation zone at a time and watch how the reading behaves. Movement with all zones off points at the irrigation main or a weeping valve; a zone that races the meter far beyond its normal pace usually has the break. The City's My Water portal also lets you set usage alerts, and a Redwood City homeowner has documented catching a broken irrigation line early in exactly this way — a spike flagged before the yard flooded.

How much water can a broken sprinkler line actually waste?

More than most people expect, because irrigation runs on a timer whether anyone is watching or not. In one documented Redwood City case, a garden hose left running for two to three days added about $200 to the bill — and a broken line on a daily watering cycle repeats that waste every single day until it is fixed. It is also why a summer bill spike deserves a meter check before it is blamed on thirsty landscaping.

Your Yard Is Watering Itself — Find Out Where

One visit separates the house from the yard, finds the broken zone, and marks the break before anyone digs. Then check your My Water portal — the pattern will tell you if we are right.

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