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We Find Leaks Others Miss

Leak Detection in San Francisco, CA powered by non-invasive detection technology. No guesswork, no unnecessary demolition, precise location on the first visit.

Precision You Can Count On

Four core commitments that separate professional leak detection from guesswork.

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Licensed & Insured

Every technician is fully licensed in San Francisco, CA and carries comprehensive liability insurance for your protection.

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Fast Dispatch

We route the nearest available tech to your address. Most customers see us within hours of calling.

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Flat-Rate Detection Fee

You receive a clear price before any work begins. No surprise charges when the job is done.

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Advanced Technology

Acoustic listening devices, thermal cameras, and tracer gas equipment locate leaks without opening walls unnecessarily.

Leak Detection in San Francisco, CA That Protects Your Property

A hidden water leak is not a minor inconvenience. Every day a leak goes undetected, water quietly saturates structural framing, insulation, drywall, and subflooring. What starts as a slightly elevated water bill can evolve into mold colonization, wood rot, foundation compromise, and repair bills that dwarf the cost of a simple detection visit. The honest reality is that many leaks exist for months before homeowners notice any visible sign, and by that point the damage is already well underway.

At Process Plumbing Services, our approach to Leak Detection in San Francisco, CA is built entirely around non-invasive methodology. We arrive with professional acoustic listening equipment that amplifies the faint sound signature water makes as it escapes under pressure through a crack or joint in your pipe. Different leak types produce distinct acoustic fingerprints, and our technicians are trained to read those signals with precision across concrete slabs, under tile, behind finished walls, and beneath landscaping and driveways.

For leaks that are too deep or too diffuse for acoustic detection alone, we add thermal imaging to the visit. An infrared camera reveals temperature anomalies that are invisible to the naked eye. Wet building materials retain or release heat differently than dry ones, and those contrasts show up clearly on the thermal display, allowing us to pinpoint the source without a single unnecessary hole in your drywall. In cases involving pressurized supply lines beneath slabs or underground runs, we can introduce a safe, inert tracer gas into the pipe and use a sensitive probe to follow the gas to the exact failure point.

What does a typical detection visit look like? We begin with a pressure test on the supply line to confirm a leak is active and to establish a baseline reading. From there we systematically work through the most likely zones based on where your water meter is registering consumption. Once we identify the leak location, we document it precisely and provide you with a written report plus repair options so you can make an informed decision about next steps. You will never leave a visit wondering what we found or what to do about it.

Ignoring a spiking water bill or an unexplained wet spot in your yard is one of the costlier mistakes a homeowner can make. Our detection service exists to give you facts fast, so you can act before small problems become catastrophic ones. Call Process Plumbing Services today and let our team put our technology to work for your home in San Francisco, CA.

Leak detection technician using acoustic equipment
Non-Invasive Detection

Signs You May Have a Hidden Leak

  • Water bill higher than usual with no change in usage
  • Warm or damp spots on floors or walls
  • Sound of running water when no fixtures are on
  • Mold or mildew smell without visible source
  • Unexplained wet patches in the yard

Comprehensive Leak Detection Services

From acoustic slab scanning to pool shell inspection, our technology and training cover every leak scenario your property faces.

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Acoustic Leak Detection

High-sensitivity ground microphones and electronic amplification pinpoint the exact pipe location where water is escaping, even through thick concrete slabs and dense soil.

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Slab Leak Location

Supply and drain lines buried beneath your foundation are among the most damaging leak sites. We locate them precisely before any jack-hammering begins, saving time and structural disruption.

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Underground Pipe Scanning

Main water lines and buried lateral runs beneath driveways and landscaping are found using a combination of pressure isolation, acoustic probing, and tracer gas injection.

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Thermal Imaging Inspection

Our infrared cameras read temperature differences in walls, ceilings, and floors that reveal moisture intrusion patterns, helping identify leak boundaries and secondary wet zones.

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Pressure Test & Isolation

We systematically isolate pipe segments and test each zone under controlled pressure, allowing us to confirm exactly which section of plumbing is compromised before any repair work begins.

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Pool & Irrigation Leak Detection

Pool shell cracks, return line failures, and irrigation system breaches waste enormous water volumes. We perform dye tests, pressure checks, and acoustic scans to find every loss point.

How Our Detection Visit Works

A clear, four-step process from your first call to a documented leak location.

1

Call & Diagnose

You call Process Plumbing Services and describe your symptoms. Our dispatcher asks a few targeted questions to prepare the right equipment for your specific situation.

2

Dispatch

A licensed detection technician is routed to your property in San Francisco, CA with acoustic, thermal, and pressure testing gear loaded and ready.

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Assessment & Quote

The tech performs a systematic pressure isolation and technology-assisted scan of your plumbing. You receive a clear written location report and repair pricing before any work proceeds.

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Resolution

With the exact leak location documented, repair options are presented. Many slab and wall leaks can be addressed the same day detection is completed, minimizing disruption.

What Homeowners in San Francisco, CA Say

★★★★★

"My water bill nearly doubled and I had no idea where the water was going. The tech from Process Plumbing Services showed up with all these sensors and found a slab leak under my kitchen in under two hours. No unnecessary demo, just a precise location. Saved me from tearing up the whole floor."

Marcus T. - San Francisco, CA
★★★★★

"I heard water running in the wall even when everything was off. Called Process Plumbing Services and they were there within a few hours. The thermal camera showed a hot water line leak behind my bathroom wall. They marked the exact spot and I had it repaired the same afternoon."

Priya R. - San Francisco, CA
★★★★★

"Our pool was losing about two inches a week and my landscaper found an unexplained wet patch along the back fence. Process Plumbing Services ran a full pressure test and acoustic scan on the irrigation and pool return lines. Found two separate leaks in one visit. Excellent work."

David & Lynn K. - San Francisco, CA

Leak Detection FAQ

How do you find a leak without tearing up walls? ▼
We use a combination of acoustic listening devices, thermal imaging cameras, and pressure isolation tests. Acoustic sensors amplify the sound water makes as it escapes a pipe under pressure, allowing us to pinpoint the leak through concrete, soil, and finished walls. Thermal cameras reveal temperature anomalies caused by moisture. Together these tools give us a precise location so that any necessary opening is surgical rather than exploratory.
What is acoustic leak detection? ▼
Acoustic leak detection uses professional-grade ground microphones and electronic amplifiers to detect the sound signature that pressurized water creates when it escapes through a pipe failure. Every leak produces a characteristic noise frequency. Trained technicians interpret these signals while methodically scanning across the suspected pipe run, narrowing the location to within inches before any physical investigation begins. It is the most commonly used non-invasive detection method for slab and underground leaks.
How accurate is non-invasive leak detection? ▼
When performed by trained technicians with professional-grade equipment, non-invasive detection is highly accurate. In favorable conditions such as pressurized supply lines under concrete slabs, acoustic detection can pinpoint a leak to within a foot or less. Thermal imaging adds a secondary layer of confirmation. Results can vary with deep lines, multiple simultaneous leaks, or highly diffuse seepage, in which case we may use tracer gas to supplement. We will always tell you the confidence level of our finding before repair work begins.
My water bill spiked -- do I have a leak? ▼
A sudden increase in your water bill without a corresponding change in usage habits is one of the most reliable early indicators of a hidden leak. Before calling us, do a quick check: turn off all fixtures in your home and watch your water meter for 15 minutes. If the dial or digital display continues moving, water is actively flowing somewhere it should not be. A running toilet can cause this as well, so check by dropping food coloring in each toilet tank. If the toilet check comes back clean and the meter is still moving, it is time for a professional detection visit.
How long does a leak detection visit take? ▼
Most standard leak detection visits for a single-family home take between 90 minutes and three hours, depending on the size of the property and the number of plumbing zones we need to test. A straightforward slab leak under a kitchen or bathroom is often located in under two hours. Larger properties, pools, or complex underground irrigation systems may take longer. We will give you a realistic time estimate when you call based on the symptoms you describe.
What happens after the leak is located? ▼
Once we document the precise leak location, we provide you with a written report and discuss repair options. Depending on the pipe type, location, and severity, options may include spot repair, pipe relining, rerouting, or full section replacement. We provide pricing for each option so you can make an informed decision. In many cases our technicians can perform the repair the same day. If the scope requires additional crew or equipment, we will schedule the repair promptly and leave your property protected in the meantime.

Serving San Francisco and Surrounding CA Communities

Our technicians serve homeowners and businesses throughout San Francisco, CA. Call +1-855-718-1500 to confirm same-day availability in your area.

San Francisco, CA Nearby Cities in San Francisco, CA Surrounding Counties Metro CA

Our Services in San Francisco, CA

San Francisco (/ˌsæn frənˈsɪskoʊ/ SAN frən-SISS-koh; Spanish for 'Saint Francis'), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous city in California, with 808,437 residents, and the 17th most populous city in the United States as of 2022. The city covers a land area of 46.9 square miles (121 square kilometers) at the end of the San Francisco Peninsula, making it the second most densely populated large U.S. city after New York City and the fifth-most densely populated U.S. county, behind only four of the five New York City boroughs. Among the 91 U.S. cities proper with over 250,000 residents, San Francisco was ranked first by per capita income and sixth by aggregate income as of 2021. Colloquial nicknames for San Francisco include Frisco, San Fran, The City, and SF.

Zip Codes in San Francisco, CA that we also serve: 94130 94131 94132 94133 94134 94103 94102 94105 94104 94188 94158 94124 94123 94122 94121 94129 94110 94118 94112 94116 94117 94114 94115 94111 94109 94108 94107 94127 94119 94120 94125 94126 94137 94139 94140 94141 94142 94143 94144 94145 94146 94147 94151 94159 94160 94161 94163 94164 94172 94177 94128

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