Open 24 hours, 7 days a week ☎ +1 626-898-6221
Alhambra, California · Open 24 Hours

Leak Detection in Alhambra, CA

Hidden water leaks waste thousands of gallons and quietly destroy homes. Alhambra Leak Pros pinpoints them with acoustic listening, thermal imaging, and tracer gas — without tearing your property apart.

How we find leaks

Four Proven Methods. One Precise Answer.

Most leaks are found with a combination of methods — each one confirms the others, so you're never paying for guesswork.

Acoustic Listening

Electronic sensors hear the distinct sound of water escaping a pressurized pipe and trace it to its loudest point — through soil, concrete, and flooring.

Learn more →

Thermal Imaging

Infrared cameras reveal the temperature footprint of hidden moisture behind walls and under floors — no contact, no damage.

Learn more →

Tracer Gas

A safe, inert gas is introduced into the line; it escapes at the defect and rises to the surface, where a sensitive detector pinpoints it — even through plastic pipe.

Learn more →

Camera Inspection

High-resolution cameras travel inside drain and sewer lines, showing exactly what's wrong — roots, cracks, bellies, offsets — on video.

Learn more →
Our services

Every Leak Has a Specialty. We Cover Them All.

Fifteen dedicated services — from slab leaks to pool leaks to commercial water-loss surveys. Pick yours:

Acoustic Leak Detection

Electronic listening that pinpoints hidden leaks — without tearing open walls or digging up floors.

Learn more →

Thermal Imaging Leak Detection

Infrared cameras that reveal the heat signature of hidden water — without a single hole in your walls.

Learn more →

Tracer Gas Leak Detection

A safe hydrogen tracer gas that escapes through the tiniest cracks — and leads our sensors straight to the leak.

Learn more →

Video Camera Pipe Inspection

A live look inside your pipes — see the blockage, break, or root intrusion with your own eyes.

Learn more →

Pipeline Pressure Testing

Prove the leak exists — and isolate exactly which line it is on — before any pinpointing begins.

Learn more →

Slab Leak Detection

Find the leak under your concrete foundation — and open one precise spot instead of the whole floor.

Learn more →

Wall and Ceiling Leak Detection

That stain isn't always where the leak is. We trace it to its true source — before you fix the wrong thing.

Learn more →

Underground Main Line Leak Detection

Your water line runs from the meter to your house underground. When it leaks there, we find it — without excavating the yard.

Learn more →

Pool and Spa Leak Detection

Losing water faster than evaporation can explain? We find the leak — shell, plumbing, or equipment.

Learn more →

Sewer and Drain Line Tracking

See the problem with a camera — then know exactly where it is underground, and how deep.

Learn more →

Commercial Water Loss Surveys

Unexplained water loss across your property? A systematic survey finds it — with minimal disruption to operations.

Learn more →

Trenchless Pipe Relining

A new pipe inside your old pipe — rehabilitate the line without trenching the property.

Learn more →

Targeted Spot Pipe Repair

One failed joint, one isolated crack — repaired from inside the pipe, without digging up the line.

Learn more →

Structural Moisture Mapping

Finding the leak is step one. Mapping exactly how far the water traveled is step two.

Learn more →

Emergency Water Shut-Off & Isolation

Water pouring where it shouldn't? Here's what to do in the first minutes — and who to call.

Learn more →
Why Alhambra calls us

A Detection Specialist — Not a Guess-and-Dig Plumber

Most plumbing companies treat leak detection as a side task between repair jobs. It's our entire focus. That specialization shows up in the equipment we carry, the methods we combine, and the documentation you receive.

Alhambra's housing tells the story: the city's own housing plan notes that over 80% of homes here are at least 30 years old. Galvanized lines from the 1930s–60s corrode from the inside. Cast iron from the 1940s–70s separates at the joints. Copper develops pinhole leaks. These failures start hidden — and hidden is exactly where our instruments look.

  • Non-invasive first: nothing is opened during detection. Ever.
  • Marked, documented results: the leak's position, marked on the surface and explained in plain language.
  • Open 24 hours: nights, weekends, holidays — water emergencies don't wait.
  • San Gabriel Valley local: based in Alhambra, serving the whole Valley.
Technician performing acoustic leak detection in an Alhambra home

Not sure where to start?

Describe what you're seeing — the bill, the sound, the stain — and we'll tell you honestly whether you need a detection visit.

Call +1 626-898-6221
Our process

From First Call to Marked Leak in Four Steps

Tell us the symptoms

Call any time. We listen to what you're experiencing — bill spike, sounds, stains, warm floors — and determine whether a detection visit is warranted.

Confirm the loss

On site, we start with meter and pressure checks to prove water is actually escaping and isolate which line is involved.

Pinpoint with instruments

Acoustic listening, thermal imaging, tracer gas, or camera inspection — used alone or combined until the location is certain.

Mark and document

The leak's position is marked on the surface and documented, so any repair opens one precise spot — not a trench.

Where we work

Proudly Serving Alhambra & the San Gabriel Valley

Tap your area for local leak detection service:

San Gabriel Monterey Park South Pasadena San Marino El Sereno Rosemead Pasadena Monterey Hills Midwick Tract Emery Park Alhambra Hills Bean Tract Airport Tract Mayfair Tract Downtown Alhambra

View all service areas →

From the blog

Leak Wisdom for Alhambra Homeowners

7 Signs of a Hidden Water Leak in Your Alhambra Home

Most leaks never show themselves until the damage is done. Here are the seven warning signs — and a two-hour test you can run today.

Read article →

Water Bill Suddenly High? Is a Hidden Leak the Cause?

A high water bill is often the first sign of a hidden leak. Here is how to confirm it, rule out other causes, and decide what to do next.

Read article →

How Professionals Locate Leaks Under a Concrete Slab

A leak under a concrete slab sounds impossible to find without demolition. Here is the step-by-step sequence professionals actually use to pinpoint it.

Read article →

All articles →

Common questions

Leak Detection FAQs

How do I know if I have a hidden water leak?
The most common signs are an unexplained spike in your water bill, the sound of running water when all fixtures are off, warm spots on floors, damp or musty areas, and low water pressure. A simple two-hour water-meter test (no water use, compare readings) confirms whether water is escaping the system.
Will leak detection damage my home?
No. Professional leak detection is non-invasive — we use acoustic sensors on surfaces, thermal cameras, tracer gas, and inspection cameras through existing access points. Nothing is cut open or dug up during the detection visit.
What's the difference between leak detection and leak repair?
Detection is the diagnostic visit: we find and mark the exact location of the leak. Repair is the separate step of fixing it. Knowing the precise location first means any repair opens one small, targeted area instead of exploratory demolition.
Do you really answer 24 hours a day?
Yes — Alhambra Leak Pros is open 24 hours, 7 days a week, including nights, weekends, and holidays. Water emergencies don't keep business hours, so neither do we. Call +1 626-898-6221 any time.
Which areas do you serve?
We are based in Alhambra and serve the surrounding San Gabriel Valley, including San Gabriel, Monterey Park, South Pasadena, San Marino, El Sereno, Rosemead, Pasadena, and Monterey Hills, plus Alhambra neighborhoods like the Midwick Tract, Emery Park, and the Airport Tract.
Can you find a leak under a concrete slab without breaking it?
Yes — that is exactly what acoustic listening and thermal imaging are designed for. Sound travels well through concrete, so a pressurized line leaking beneath a slab produces a traceable signal. The slab is only opened at the marked spot if a repair is needed.

Request Leak Detection Service

Prefer to talk? Call +1 626-898-6221 — open 24 hours.

Suspect a Hidden Leak? Don't Wait for the Damage.

Every day a hidden leak runs, the water bill climbs and the damage spreads. Call now — we answer 24 hours a day.

+1 626-898-6221 ☎ Call Now   Request Leak Detection Service
☎ Call +1 626-898-6221