Licensed & Insured · CA LIC #982663
Open 24/7 · Mon-Sun
Pacifica, San Francisco, Burlingame, CA · Serving the Bay
PACIFICA, CA • LIC #982663 • 24/7
We answer the phone day, night, weekends, and holidays, with same-day service across the Peninsula.
A hidden leak costs money every hour it runs and damages whatever it soaks. Works Plumbing provides leak detection in San Mateo, CA to find leaks in walls, ceilings, floors, slabs, and yard lines, and we look at the condition of the pipe around every leak we find.
Upfront pricing. Same-day service. No obligation.
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THIS MONTH’S BEST DEAL
One-time use. Combine with our 24/7 emergency service and pay only when the job is done. Mention this offer when you book.
Expires soon Cannot be combined
Book leak detection with Works Plumbing and we will locate the source before anyone opens a wall.
Key Takeaways
Some leaks show up as water. Many show up somewhere else first:
You can do a quick test yourself. Turn off every fixture and appliance that uses water, then watch the meter for 15 minutes. If it moves, water is going somewhere.
We use a step-by-step approach so we can narrow the leak without tearing up your home.
Finding the leak is half the job. The repair depends on what failed and where.
If high pressure played a part, we address that too. Otherwise the same stress keeps working on the rest of the system.
A little preparation helps us find the leak faster and keeps the visit short.
For condos and apartments, let your building manager know we are coming. A leak that shows in your ceiling may start in the unit above, and we may need access there too.
We at Works Plumbing have been family owned and operated since 2009. Here is what you get when you call us:
We serve every San Mateo neighborhood, from Shoreview and Parkside near the Bay to the hills above El Camino Real. See our full list of local services on the San Mateo plumbing services page, or read more about our leak detection service.
I had one pinhole leak repaired. Will I get more?
Possibly. Cal Water’s 2025 report attributes some copper and lead at the tap to internal corrosion of household plumbing, and corrosion rarely stops at one spot. When we repair a pinhole, we look at the pipe on both sides and tell you what we see, so you can plan instead of waiting for the next leak.
Can high water pressure cause leaks?
Yes. Pressure is constant, so it stresses joints, valves, and connectors around the clock. Over time the weakest point gives. If we find high static pressure, we recommend checking or adding a pressure regulator along with the leak repair.
Who do I call if the leak is on the street side of my meter?
Call your water supplier. Most of San Mateo is served by Cal Water, and part of the city is served by the Estero Municipal Improvement District, operated by Foster City. Your water bill shows which one serves you. We handle leaks on the house side.
My water bill went up after the winter rains. Is that a leak?
Rain does not raise water use, so a higher bill after a wet stretch points to something else, such as a running toilet, an irrigation leak, or a supply line leak. Our meter and isolation test sorts out which.
Do you find slab leaks in San Mateo homes?
Yes. Some San Mateo homes have hot and cold lines running under a concrete slab. Warm floor spots and the sound of running water are common clues. We use acoustic and thermal tools to locate the leak before any concrete is cut.
Will you cut holes in my walls to find the leak?
Not to find it. We locate the leak first with listening, thermal, and moisture tools. We open a wall only at the confirmed spot, and only to make the repair.
Every day a hidden leak runs, the damage spreads. Schedule leak detection in San Mateo and get a clear answer and an upfront repair price.
Leak detection systems work by monitoring the flow of water through either an ultrasound or a mechanical turbine. Such leak detection systems track the pattern of the water flow by either counting or recording the gallonage passing through the sensor. The presence of moisture is often isolated from other detectors of leaks. If moisture enters the surfaces, a mechanical valve is triggered, which will block water flow when such leak detection systems senses. Moisture sensing detectors are best suited for point-of-use applications that are under-sink. Leak detection devices all over the house continue to monitor the use of water to prevent potential leakage. At Works Plumbing, we guarantee 100% client satisfaction for your leak repair, including trenchless pipe repair options for minimal disruption to your property.
Every job comes with upfront pricing, licensed and background-checked technicians, and a 100% satisfaction guarantee . No surprises, no pressure, ever.
Snap a photo of the problem before you call, it helps us bring the right parts on the first visit.
See how we handle it:
Prefer to listen? Catch this topic on our homeowner podcast:
Upfront pricing, licensed techs, and a real human on the phone 24/7 across the Peninsula.
A look at real Works jobs around the Peninsula.
Many hidden leaks do not start with a burst. They start with a pipe wall that thins slowly from the inside until a pinhole opens.
Cal Water’s annual report points to where that wear happens. The Cal Water 2025 water quality report for the San Mateo System states that the system has no known lead service lines, and lead at the 90th percentile of tap samples was not detected. The report also attributes copper and lead detections in part to internal corrosion of household plumbing.
The metal reaching the tap comes, at least partly, from the owner’s own pipes. Corrosion inside a supply line works where no one can see it:
A pinhole is rarely alone. If one spot has corroded through, other sections of the same pipe may be close behind.
That shapes how we at Works Plumbing work. We locate the active leak first. When we open the wall or floor to repair it, we look at the pipe on both sides of the failure. If the wall is thin there too, we tell you, so you can choose a section repair or a broader fix with the facts in hand.
We also serve these neighboring Peninsula towns.
We’ve earned our reputation one happy homeowner at a time.
“Thank you again for another job well done, and thank you for responding right away. I will continue to recommend Works Plumbing because they respond right away and get the job done efficiently.”
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Drain cleared or it’s free. Limit one per household.rnrn
Mention this offer when you schedule EXPIRES 12/31/2026Save $500 on a new tankless water heater install.rnrn
Mention this offer when you schedule Expires 12/31/2026With any drain cleaning service over $250. See the problem yourself.
Mention this offer when you schedule Expires 12/31/2026Thank you for your service. Ongoing: no expiration.
Mention this offer when you schedule Valid year-roundLabor only with purchase of new toilet. Includes haul-away.
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A real human will answer, dispatch a stocked Works van, and get someone at your door the same day. No phone trees. No robots. No “we’ll get back to you Monday.”
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