Leak Detection

Water leaks do not always announce themselves with a burst pipe or a puddle on the floor. Many of the most damaging leaks in Northern Virginia homes go undetected for months, quietly driving up water bills and rotting out structural materials behind walls and beneath slabs. At Keston’s Plumbing, we use non-invasive leak detection technology to find hidden leaks throughout Alexandria, Arlington, Fairfax, and the DC Metro Area without tearing up your walls or floors.

With more than 10 years of experience in Northern Virginia, we are licensed and insured through the Virginia Department of Professional and Occupational Regulation (VA DPOR) and Green Plumbing Certified. When you call us, you get accurate diagnostics, honest pricing, and a 30-day warranty on every repair.

How Our Leak Detection Technology Works

Traditional leak detection meant cutting into drywall, pulling up flooring, or breaking through concrete on a hunch. That approach is expensive and unnecessary with modern equipment. Keston’s Plumbing uses several non-invasive methods to pinpoint leaks before any demolition takes place.

Acoustic Leak Detection

Pressurized water escaping from a pipe creates sound, even when the leak is buried beneath a concrete slab or hidden inside a wall cavity. Our acoustic detection equipment amplifies these sounds so our technicians can isolate the exact location. This method is particularly effective for slab leak detection in Alexandria homes built on concrete foundations.

Thermal Imaging

Infrared thermal imaging cameras detect temperature differences behind surfaces. A leaking hot water line creates a warm spot that is invisible to the naked eye but clearly visible on a thermal scan. This lets us trace hidden pipe leaks without removing a single tile or section of drywall.

Water Meter Testing

Sometimes the first step in confirming a suspected leak is the simplest. We shut off all water use in the home and monitor the meter for movement. If it continues to register flow, there is a leak in the system. From there, we use our detection equipment to track it down.

Hidden Signs of a Water Leak

Many homeowners in Alexandria contact us after noticing one or more of these warning signs. If any sound familiar, schedule a leak detection inspection sooner rather than later.

• Unexplained water bill increase. A sudden spike with no change in usage habits is one of the most reliable indicators of a hidden leak.
• Musty smell. Persistent dampness behind walls or under floors creates a stale, musty odor that air fresheners cannot mask.
• Mold or mildew growth. Mold thrives in moist environments. If you see mold in areas that should be dry, a hidden pipe leak may be feeding it.
• Damp spots on walls, ceilings, or floors. Discoloration, bubbling paint, or soft spots in flooring often point to water where it should not be.
• Foundation cracks. In Northern Virginia homes with slab foundations, an undetected slab leak can erode soil beneath the concrete and cause cracking or settling.
• Sound of running water when nothing is on. If you hear water flowing through pipes when every faucet and fixture is turned off, there is likely a leak in the line.

Left unchecked, even a small leak can lead to thousands of dollars in water damage and mold remediation.

Slab Leak Detection in Northern Virginia

Slab leaks are among the most serious plumbing issues we encounter in Alexandria and the surrounding DC Metro Area. Many homes in this region sit on concrete slab foundations, and the pipes beneath those slabs are subject to corrosion, shifting soil, and deterioration over time.

Because you cannot see or access these pipes, slab leaks can go undetected until significant damage has occurred. Our non-invasive detection methods locate slab leaks accurately, meaning the repair requires minimal disruption to your foundation and your home.

Preventing Costly Water Damage

The real value of professional leak detection is finding the problem early, before it causes damage that costs far more to repair than the leak itself. Hidden leaks can compromise drywall, insulation, subflooring, and structural framing. Prolonged moisture exposure can also create mold-related health concerns for your family.

At Keston’s Plumbing, we charge by the job, not by the hour, so you know the cost upfront before we begin any work. Every repair is backed by our 30-day warranty, and we offer 90 days same-as-cash financing to keep unexpected plumbing problems from becoming a financial burden.

Schedule Leak Detection in Alexandria, VA

If you suspect a hidden water leak, do not wait for the damage to get worse. Call Keston’s Plumbing at (703) 655-5274 to schedule a non-invasive leak detection inspection. We serve homeowners throughout Alexandria, Arlington, Fairfax, and the DC Metro Area with honest, licensed plumbing services. Let us find the problem and fix it before it finds your wallet first.