Find Hidden Leaks Fast Before They Cost You More
Fig. 01 — Recent work

Find Hidden Leaks Fast Before They Cost You More

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Overview

Why Homeowners Choose Graham Plumbing and Drain Cleaning

A hot water leak you can't see is often the most destructive kind. By the time you notice a warm spot on the floor, a spike in your water bill, or damp drywall that shouldn't be wet, the damage behind that wall or beneath that slab has already been spreading. Graham Plumbing and Drain Cleaning uses non-invasive leak detection technology to pinpoint the exact source before we touch a single tile or cut a single wall. Call (714) 367-4996 now if you have any reason to suspect a hidden leak.

Our process combines thermal imaging, electronic leak detection, and video camera inspection to locate hot water leaks, cold supply leaks, and slab leaks throughout your home. We don't guess and we don't dig first. The diagnostic step happens before any repair recommendation. Cost for leak detection service varies considerably based on access, pipe configuration, and how deep the leak is running. Slab leak detection on a large post-war OC home runs higher than tracing a supply line in a newer build. If a slab leak is confirmed, we'll walk you through repair options, including trenchless sewer repair methods where applicable. Every job is different. Contact Graham Plumbing and Drain Cleaning for an accurate estimate.

(714) 367-4996

Why Non-Invasive Detection Matters for Orange County Homes

Most Orange County homes sit on slab foundations. That's not a problem until a hot water line or cold supply line running beneath that slab develops a pinhole leak. Without proper detection equipment, the old approach was to jackhammer up the floor and start looking. We don't do that. Thermal imaging shows us temperature differentials in the slab that point directly to where water is escaping. Electronic acoustic sensors let us hear pressurized water escaping from pipes inside walls or underground without opening anything up. We've found leaks in Garden Grove homes that had been quietly running for months, driving water bills up and softening the subfloor. Catching it early is the only thing that keeps a repair from becoming a full bathroom remodel.

leak detection work — professional service in CA
Fig. 02 — Why Non-Invasive Detection Matters for Orange County Homes

What We Use to Find Leaks You Can't See

Our leak detection work relies on a set of tools that most plumbers don't carry. Each one is suited to a different type of hidden leak.

Fig. 03

Thermal Imaging

Infrared cameras detect temperature changes in walls, floors, and ceilings caused by escaping hot water. A hot water leak beneath a slab shows a distinct heat signature that points directly to the pipe run. No guessing, no exploratory demolition.

Fig. 04

Electronic Acoustic Detection

Pressurized water escaping a pipe makes a sound. We amplify it. Acoustic sensors placed against walls or the slab surface detect the frequency of a leak even when it's buried under several inches of concrete.

Fig. 05

Video Camera Inspection

For drain and sewer line leaks, we run a camera through the line directly. This tells us not just where the failure is but what caused it. Learn more in our post about why video camera inspections are important.

Fig. 06

Pressure Testing

When a leak is suspected but not located, we can isolate and pressure-test individual line segments. A drop in pressure confirms a leak in that segment and narrows the search considerably before any physical access begins.
leak detection work — professional service in CA
Fig. 03 — Signs You Have a Hidden Water Leak Right Now

Signs You Have a Hidden Water Leak Right Now

You don't need to see water to have a problem. A hot water leak under a slab will show itself in other ways first. Your water bill goes up with no change in usage. You hear running water when everything in the house is off. There's a warm or discolored patch on your floor. You smell mildew in a room that shouldn't have moisture. Your water pressure drops for no apparent reason. Any one of those is a reason to call. All of them together means you've already waited too long. If the leak is near your water heater or supply lines, check our water heater repair page, since a failing unit can mimic a supply line leak in ways that confuse a lot of homeowners. Get a proper diagnosis first.

Leak Detection vs. What the Other Guys Do

Honestly, a lot of plumbers skip the diagnostic step entirely. They show up, take a look at where the damage appears, and start opening walls in that general area. That's not detection, that's guessing with a reciprocating saw. We won't do that. The technology exists to find the leak precisely, and using it saves you demolition costs, repair time, and the risk of missing the real source while cutting up the wrong section of drywall. Our video camera inspection process applies the same principle to drain and sewer lines. Diagnose first, repair second. That's the only order that makes sense.

leak detection work — professional service in CA
Fig. 04 — Leak Detection vs. What the Other Guys Do
leak detection work — professional service in CA
Fig. 05 — Leak Detection Service Throughout Orange County

Leak Detection Service Throughout Orange County

We serve homes and businesses across Orange County, including Anaheim, Fullerton, Garden Grove, Huntington Beach, Buena Park, and surrounding cities. If you're in the 714 and you've got a suspicious water bill or unexplained moisture, we can typically get out same day. For La Mirada customers, we have a dedicated leak detection La Mirada CA page with more local detail. The faster you call, the less water has moved through your structure. Call (714) 367-4996 to schedule your inspection.

Don't Wait on a Hidden Leak

Water damage compounds quickly. A small leak found today is a repair. The same leak found six months from now is a reconstruction project. Graham Plumbing and Drain Cleaning is available 24/7 for leak detection service throughout Orange County. Call now and we'll find it.

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Common questions

A few things people ask us regularly.
01 How does thermal imaging find a hot water slab leak?
Hot water escaping a pipe beneath a concrete slab raises the temperature of the slab surface directly above it. An infrared camera captures that temperature differential as a visible heat signature. We map the warm zone, cross-reference with the known pipe routing in your home, and identify the leak location precisely. It's non-invasive and takes far less time than any exploratory excavation.
02 Can you detect a leak without cutting open my walls?
In most cases, yes. Acoustic sensors detect the sound frequency of pressurized water escaping a pipe through walls or concrete. Thermal imaging detects heat changes from hot water lines. We use these tools before we recommend any demolition. There are situations where physical access is ultimately required to confirm a pinhole leak in a tight location, but that's the exception, not the starting point.
03 How do I know if my water bill spike is a slab leak and not just a toilet running?
Check your meter first. Turn off every fixture and appliance in the house, then watch the meter for 10 to 15 minutes. If it moves, you have an active leak somewhere. A running toilet will show on that test too, so rule it out by shutting off the toilet supply valves one at a time. If the meter still moves after the toilets are isolated, a supply line or slab leak is the likely cause. Call us and we'll confirm it.
04 What causes hot water supply lines under a slab to fail in older OC homes?
Post-war tract homes in Garden Grove, Santa Ana, and Anaheim frequently have copper supply lines that are 40 to 60 years old. Copper corrodes from the outside in when embedded in concrete with high alkalinity or when soil chemistry is aggressive. Repeated thermal expansion from hot water cycling also stresses joints over decades. Pinhole leaks are the typical failure mode. If we find multiple pinhole leaks, we'll discuss repiping options rather than patching the same aging line repeatedly.
05 Does leak detection work on gas lines too?
Water leak detection and gas leak detection use different tools. For suspected gas line leaks, we use combustible gas detectors specifically calibrated for natural gas and propane. This is licensed work and we treat it as an emergency. If you smell gas, leave the building and call the gas company before calling anyone else. Once the utility has confirmed the line is isolated, we handle the gas line repair under proper licensing.
06 How long does a leak detection service call typically take?
A focused inspection on a single suspect area, like one section of a slab or a specific wall, usually takes one to two hours. A whole-home survey covering all supply lines and the slab takes longer. The time depends on how much pipe is in play and how quickly the thermal or acoustic signature narrows the location. We won't rush the diagnostic step since a wrong answer costs you more in the end.