Under Slab Leak Detection in Phoenix, AZ
If you own a home built on a concrete slab foundation, a leak in the pipes underneath can be a nightmare—unless you have the right team on your side. We specialize in under slab leak detection in Phoenix, using sophisticated, non-invasive technology to pinpoint the exact location of the pipe breach. Finding the leak precisely is the key to minimizing the damage and cost of the subsequent repair.
Is Water Leaking Under My Slab?
Slab leaks are often indicated by warning signs, but you must confirm the location before any heavy work begins. Look for:
- Warm Spots: A hot water line leak will make a localized spot on the floor feel warm to the touch.
- Water Heater Activity: The heater constantly running even without hot water being used.
- Cracks: New or expanding cracks in your interior drywall or tile flooring.
- High Bills: A sudden increase in your monthly water statement.
Leaks We Find and Fix
Not every leak is obvious. A high water bill, warm floor, or musty smell is often the first sign — we use professional detection equipment to find the source without tearing up your home.
Slab Leaks
Pinhole leaks under the foundation are a Phoenix specialty. We locate them with electronic detection and repair, re-route, or repipe based on your line condition.
Hidden Wall and Ceiling Leaks
Soft drywall, paint bubbles, and water stains all point to a leak you can't see. We find it without unnecessary demolition.
Outdoor and Irrigation Leaks
Soggy patches, unexplained water bills, and pressure drops in the yard. We trace the line and repair the break.
Pinhole Copper Leaks
Hard water and Phoenix soil chemistry chew through copper. We patch the immediate leak and tell you honestly whether it's a one-off or a repipe conversation.
Toilet, Faucet, and Fixture Leaks
The leaks that drive your water bill up without making a sound. We test every fixture and shut-off in the home if you'd like.
Mainline and Water Meter Leaks
Between the meter and your home is your responsibility. We locate the leak, get the right easement clearances, and repair or replace the line.
No matter your situation, our plumbers provide service you can rely on.
Non-Invasive Leak Locating Tools
We are committed to finding your leak without unnecessary demolition. Our professional-grade tools are designed to listen and see through concrete and soil:
Electronic Listening Devices: Highly sensitive microphones that listen for the subtle sound of water escaping a pipe.
Thermal Imaging: Detecting the heat signature of leaking hot water through the slab.

Accurate Detection, Less Damage
Our precision detection ensures that when we do need to access the pipe for repair, the concrete break-out is targeted and minimal. This minimal approach saves you money, time, and reduces the cost of property restoration associated with digging.
Get Under Slab Leak Detection
If you suspect a leak beneath your home’s foundation, don’t wait. Call Liberty Plumbing today to schedule expert under slab leak detection service.