Licensed Leak Detection Services in Los Angeles

Professional Leak Detection in Los Angeles — Non-Invasive, Fast & Accurate

Hidden water leaks can cause thousands of dollars in damage before you ever notice them. Plumb Inc's licensed plumbers (CA C-36 License #1095692) use professional leak detection equipment to find hidden pipe leaks, slab leaks, and gas leaks throughout Los Angeles — without unnecessary digging or demolition.

We've been detecting and repairing leaks across the San Fernando Valley, Hollywood, Pasadena, and greater LA since 2015. Call (888) 852-0055 any time — we're available 24/7 for suspected gas leaks and active water emergencies.

⚠️ Suspected gas leak? Leave the building immediately, don't use light switches or phones, and call (888) 852-0055 or 911 from outside. Gas leaks are life-threatening emergencies.

Signs you have a hidden leak

Warning Signs of a Hidden Water or Gas Leak

💧 Unexplained high water bills

A sudden spike in your water bill is often the first sign of a hidden leak — even a small slab leak can waste hundreds of gallons per day.

💦 Wet spots on floors or walls

Damp flooring, soft spots in drywall, or water stains without an obvious source point to a pipe leak inside the structure.

🔊 Sound of running water

Hearing water running when all fixtures are off is a clear sign of a leak somewhere in your plumbing system.

🌿 Unusually lush patches in yard

A section of lawn that's greener or growing faster than the rest could indicate an underground water main or sewer leak beneath it.

⚡ Low water pressure

Pressure drop throughout the home (not just one fixture) can indicate a significant leak on the supply line.

🦠 Mold or mildew smell

Musty odors in walls or under floors often indicate a hidden slow leak that's been present for weeks or months, fostering mold growth.

🔥 Warm spots on floor

Warm or hot spots on a concrete slab floor are a classic sign of a hot water line slab leak — water is heating the concrete from below.

💨 Smell of rotten eggs

The rotten egg odor added to natural gas is sulfur (mercaptan). Any smell of gas in your home requires immediate evacuation and an emergency call.

Leak detection technology we use

How We Find Hidden Leaks

Electronic Amplification

We use acoustic listening devices and ground microphones that amplify the sound of water escaping a pressurized pipe — pinpointing leaks under slabs, driveways, and inside walls without opening anything first.

Thermal Imaging

Infrared cameras detect temperature differentials in walls and floors caused by water leaks. Hot water leaks are particularly visible under a slab using thermal imaging.

Gas Leak Detectors

Electronic combustible gas detectors can sense natural gas or propane concentrations in the air and trace the leak to its source within a pipe or appliance connection.

Pressure Testing

Hydrostatic pressure testing involves filling your plumbing system with water under pressure and monitoring for pressure drop — confirming whether a leak exists before we start locating it.

Video Camera Inspection

For sewer or drain leaks, we run a flexible camera through the line to visually inspect the pipe interior — identifying cracks, root intrusions, offsets, or punctures.

Tracer Gas

For difficult-to-find leaks, we can pressurize the pipe with a harmless hydrogen/nitrogen tracer gas and use a detector to find exactly where the gas exits — even under several inches of concrete.

Frequently asked questions

Leak Detection FAQs

How much does leak detection cost in Los Angeles?

Leak detection service starts at $150–$350 for a standard diagnostic, depending on the complexity and area to be tested. Slab leak detection is typically $300–$500. Call (888) 852-0055 for a quote based on your specific situation.

Can you find a slab leak without breaking the floor?

Yes — in most cases, we can accurately pinpoint a slab leak's location using acoustic detection and thermal imaging before any concrete is touched. This minimizes the number of holes needed for repair and reduces your overall repair cost.

How long does leak detection take?

A standard leak detection visit takes 1–3 hours depending on the size of the home and the complexity of the situation. We'll give you an estimated timeframe when you call.

What happens after you find the leak?

After locating the leak, we provide a written repair estimate. For water leaks, repair options may include spot repair (open the wall/slab at the exact leak point), rerouting the pipe, or epoxy lining. We'll explain all options and costs before starting any repair work.

Do I need a plumber or a restoration company for water damage?

You need both. A licensed plumber (like Plumb Inc) stops the leak and repairs the pipe. A water damage restoration company then dries out and repairs the structural damage. We can help coordinate referrals for restoration after the plumbing repair is complete.