What is Leak Detection?
What Is Professional Leak Detection?
Water leaks are silent destroyers. A pinhole leak in a supply line behind your kitchen wall can go undetected for months, saturating the framing, growing mold colonies, and quietly inflating your water bill. By the time visible damage appears — stained drywall, buckling floors, musty odors — the repair cost has multiplied dramatically.
Professional leak detection uses non-invasive technology to find leaks without tearing apart your home. Our licensed plumbers use acoustic listening devices, thermal imaging cameras, moisture meters, and pressure testing equipment to pinpoint the exact location of a leak — often within inches — before a single wall is opened.
The EPA estimates that household leaks waste nearly 1 trillion gallons of water annually in the United States, and the average leaky home wastes more than 10,000 gallons per year. Finding and fixing leaks protects both your property and your wallet.
Types of Leaks We Detect
- Slab leaks: Pipes running beneath the concrete foundation can develop leaks that are nearly impossible to find without specialized equipment. Signs include warm spots on your floor, cracking concrete, and rapidly rising water bills.
- Behind-wall leaks: Supply lines inside walls often leak at joints and elbows. These are detected using acoustic sensors and thermal imaging.
- Underground supply line leaks: The line running from the street meter to your home can fail, causing wet yard patches and reduced pressure.
- Pool and irrigation leaks: We detect leaks in pool plumbing systems and irrigation lines without excavation.
- Roof-to-pipe leaks: Sometimes plumbing penetrations through the roof deck allow water intrusion that appears to be a plumbing leak.
- Toilet and fixture leaks: Silent toilet leaks waste up to 200 gallons per day — often completely invisible.
Signs You May Have a Hidden Leak
- Water bill increased by 20% or more with no change in usage
- Musty or mold smell in walls, under floors, or in cabinets
- Warm or hot spots on your floor (slab leak indicator)
- Low water pressure at fixtures throughout the house
- Sounds of running water when all fixtures are off
- Water meter continuing to move when all water is turned off
- Discoloration or staining on ceilings, walls, or flooring
- Foundation cracks developing faster than expected
Our Non-Invasive Leak Detection Process
Plumbing Crew USA plumbers use a multi-step approach to locate leaks accurately before any excavation or demolition:
- Visual inspection: We examine meter readings, fixtures, and accessible plumbing for obvious signs.
- Pressure testing: We isolate sections of your plumbing system and test pressure decay to determine which zone contains the leak.
- Acoustic detection: Sensitive listening equipment amplifies the sound of water escaping through pipe walls, allowing us to pinpoint the exact location.
- Thermal imaging: Infrared cameras reveal temperature differentials caused by moisture — ideal for slab leaks and in-wall leaks.
- Tracer gas testing: For stubborn leaks, we introduce a harmless hydrogen-nitrogen gas mixture that escapes through the leak and is detected at the surface.
Leak Detection Cost
- Basic inspection and pressure test: $75–$200
- Full electronic leak detection: $150–$500
- Slab leak detection: $150–$400 (detection only)
- Slab leak repair after detection: $500–$3,000+ depending on method
Early detection almost always saves money — a $200 detection appointment that prevents $15,000 in mold remediation and foundation repair is one of the smartest investments a homeowner can make. Call (888) 766-7573 to schedule a leak detection inspection.
DIY Leak Detection vs. Professional
You can perform a basic leak check at home by turning off all water-using appliances and fixtures, then watching your water meter for 30 minutes. If the meter moves, you have a leak somewhere in the system. However, finding where that leak is requires professional equipment. Attempting to open walls or excavate without pinpoint location data often results in unnecessary damage and higher repair costs.
Typical cost range: . Prices vary by location and severity. Call for a upfront quote.
Typical cost range: $150–$600. Prices vary by location and severity. Call for a upfront quote.
Find Leak Detection in Your State
We have licensed plumbers who specialize in Leak Detection across all 50 states. Select your state: