Stop the Drip Before It Becomes a Disaster

Parkway Plumbing Inc. is a licensed, bonded, and insured plumbing contractor in Woodbridge, VA, serving residential and commercial customers across Prince William County and Northern Virginia. When a slow drip or hidden pipe leak goes unnoticed, it can silently damage walls, floors, and foundations. Call us at 703-690-6878 and let our experienced plumbers pinpoint the problem fast.

What Leak Detection Is and Why It Matters


Leak detection is the process of locating water leaks inside walls, under slabs, behind fixtures, and within underground lines without causing unnecessary damage to your home or business. Even a small, slow leak can waste thousands of gallons of water per year and quietly destroy drywall, flooring, and structural materials. Catching it early saves money, protects your property, and prevents mold growth before it starts.

How Parkway Plumbing Finds Hidden Leaks

Our plumbers bring years of hands-on experience and the right tools to track down leaks that are not visible to the naked eye. We assess your system carefully, checking supply lines, drain connections, fixture seals, and underground pipes to isolate the source. Once we identify the leak, we explain exactly what we found and what it will take to fix it before any work begins.

Common sources we investigate include:

  • Pinhole leaks in copper or galvanized supply lines
  • Leaking pipe joints under slabs or behind walls
  • Slab leaks that show up as warm spots on floors or elevated water bills
  • Dripping faucet supply lines and shutoff valves
  • Leaks along the main water line entering your home

Signs You May Have a Leak You Cannot See

Many leaks stay hidden for months before a homeowner notices the damage. Knowing what to look for helps you act before the problem gets worse.

Watch for these warning signs:

  • A water bill that is suddenly higher than normal with no change in usage
  • Damp spots, discoloration, or bubbling paint on walls or ceilings
  • The sound of running water when all fixtures are off
  • Soft or warped flooring, especially near bathrooms or the kitchen
  • A water meter that continues to move after all water is shut off inside

If you notice any of these signs in your Prince William County, VA, home or commercial property, call us at 703-690-6878 for same-day service.

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Frequently Asked Questions About Leak Detection

  • How do I know if I have a slab leak in my home?

    Common signs include warm spots on your floor, the sound of running water beneath the slab, or unexplained spikes in your water bill. A licensed plumber can confirm a slab leak quickly using a pressure test and visual assessment.

  • How much does leak detection cost in Woodbridge, VA?

    Leak detection pricing depends on the complexity of your system and the suspected leak location. Parkway Plumbing Inc. provides free estimates in Prince William County so you know the cost before any work begins.

  • Can a hidden leak cause mold in my home?

    Yes, even slow leaks behind walls or under floors create the moisture that mold needs to grow. Finding and fixing the leak quickly is the most effective way to prevent mold from spreading.

  • How long does a leak detection visit take?

    Most residential leak detection visits are completed within one to two hours depending on the size of the property and the number of suspected problem areas. Our plumbers work efficiently and keep you informed throughout the process.

Narrow trench with gravel and a gray pipe running toward a brick house foundation
Kitchen sink with white faucet beneath a window, potted plants on the sill, and dishes at the right.

Leaking Pipes in Northern Virginia? Get Answers Today


Parkway Plumbing Inc. has served Woodbridge, VA, and the surrounding Northern Virginia communities with honest, skilled plumbing work backed by two generations of experience in the trade. If a hidden leak is raising your water bill or quietly damaging your home, do not wait. Call us at 703-690-6878 and we will send someone out the same day, any day of the week, including holidays.