Leak Detection

A leak that goes unnoticed for even a few weeks can quietly cost hundreds of dollars in wasted water, and in Phoenix’s slab-foundation homes, it can undermine flooring or drywall long before there’s any visible sign of a problem. Finding the leak accurately — before anyone starts cutting into a wall or floor — is the part of the job that actually determines how much the repair costs and how much of your home gets disturbed.

Signs You May Have a Hidden Leak

Hidden leaks tend to announce themselves indirectly rather than with an obvious puddle:

• An unexplained increase in your water bill with no corresponding change in usage
• A warm or damp patch on flooring, which often points to a leaking hot water line
• The sound of running water somewhere in the house when every fixture is off
• Noticeably lower water pressure throughout the home
• A musty smell, or mold or mildew appearing near a wall or floor with no obvious source

Any one of these is worth a call. Several together usually means the leak has been running for a while.

Our Process

We don’t start cutting into anything on a leak detection call — the entire point of the visit is to locate the leak precisely enough that any repair afterward is targeted rather than exploratory. We start with a conversation about what you’ve noticed and when, which helps narrow down whether we’re likely looking at a slab leak, a leak inside a wall, a fixture connection, or even an outdoor irrigation line rather than the home’s plumbing at all.

From there we use a combination of tools depending on what we’re chasing. Acoustic detection equipment listens for the distinct sound water makes escaping a pipe under pressure, which can be picked up through a slab or wall even though the leak itself is invisible. Thermal imaging helps in cases involving a hot water line, since a hot line leaking under a slab creates a detectable warm patch that shows up clearly on a thermal camera even before it’s noticeable by touch. We also isolate sections of your plumbing and pressure test them, which tells us whether the leak is on the main supply side or isolated to a specific branch or fixture line — narrowing that down early saves significant time.

Once we’ve pinpointed the leak as closely as the equipment allows, we’ll show you what we found — where it is, roughly how it happened, and what repairing it will actually involve. For a leak in an accessible location, like inside a wall or under a sink, that’s often a straightforward repair on the spot. If the leak turns out to be under the slab, we’ll walk you through the options covered in more detail on our slab leak repair page, including the trade-off between accessing the slab directly versus rerouting the line to avoid cutting concrete at all.

Phoenix’s hard water is worth mentioning here specifically, because it accelerates corrosion in older copper piping, and a leak detection call in an older home sometimes turns up more than one weak point along the same run of pipe. When that’s the case, we check the full length of affected piping rather than stopping at the first leak we find, so you’re not calling us back in a month for the next pinhole leak in the same line.

What to Expect During Your Appointment

A leak detection visit starts with questions, not equipment. We’ll ask when you first noticed something was off, what exactly you’ve seen or heard, whether it correlates with using a specific fixture, and whether your water bill history shows a gradual increase or a sudden jump — each of those details points us toward a different likely cause and location before we ever turn on a piece of detection equipment.

From there, we systematically test to narrow things down: checking whether the main line is holding pressure when everything in the house is off, isolating branch lines to see which section is losing pressure, and using acoustic or thermal equipment once we have a general area to focus on. This process can take anywhere from thirty minutes for a fairly obvious case to a couple of hours for a leak that’s proving harder to pin down, and we’ll keep you updated on what we’re finding as we go rather than disappearing into your walls for an extended silent search.

Once we’ve located the leak, we stop and talk with you before doing anything further. You’ll know exactly where the leak is, roughly how it likely happened, and what your repair options look like, with pricing, before any cutting, drilling, or further invasive work begins.

Local Considerations for Phoenix-Area Leaks

The combination of slab foundations and hard water creates a fairly distinctive leak pattern across the Valley: copper supply lines running under or through the slab develop pinhole leaks from mineral-accelerated corrosion at a higher rate here than in softer-water regions, and because those lines are inaccessible without cutting concrete, the leaks tend to run longer before discovery than a comparable leak in an exposed pipe would. This is a large part of why acoustic and thermal detection tools, rather than exploratory demolition, have become the standard approach for this kind of work in this region specifically.

Outdoor leaks are also worth a mention, since irrigation and landscaping lines are common in Valley properties with desert landscaping and drip irrigation systems, and a failed fitting or cracked line out in the yard can sometimes mimic the water-bill symptoms of an indoor leak. Part of our initial assessment on any leak call involves ruling in or out whether the problem is actually inside the home’s plumbing at all, rather than an irrigation issue that just happens to be driving up the same water bill.

Pricing Transparency

Leak detection is typically priced as its own diagnostic visit, quoted upfront before we start, and separate from whatever repair follows once we know what we’re dealing with. We do this deliberately — bundling detection and repair into one vague number makes it too easy to lose track of what you’re actually paying for. Once we’ve located the leak, we’ll give you a clear, written estimate for the repair itself before doing any further work, so you can decide with full information rather than mid-repair pressure.

Why Choose TC Gutierrez Plumbing

Guessing at a leak’s location and cutting exploratory holes to find it is how a simple repair turns into an expensive, disruptive one. We invest in acoustic and thermal detection equipment specifically to avoid that outcome, and we’re licensed, bonded, and insured on every visit, which matters given that leak detection often means working in finished living spaces.

We serve homeowners and businesses across the entire Phoenix Valley — Phoenix, Scottsdale, Tempe, Mesa, Chandler, Gilbert, Paradise Valley, Ahwatukee, Glendale, and Peoria — and our experience with this region’s slab foundations and hard-water-driven pipe corrosion means we’re rarely seeing a leak pattern we haven’t encountered before.

If something about your water bill, your floor, or the sound of your plumbing doesn’t seem right, don’t wait for it to get worse. Explore our other services, confirm we serve your area, or contact us to schedule a leak detection visit.