Leak Detection & Plumbing Repair | Northern Virginia
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Call (703) 832-9090

Service · Northern Virginia

Leak Detection & Plumbing Repair

Find the leak, fix it right, stop the waste.

Quick answer

LeMaster Plumber finds and repairs plumbing leaks of every kind across Northern Virginia — dripping faucets, running toilets, leaking supply lines, and hidden leaks inside walls, ceilings, and slabs. We locate the source precisely so the repair is targeted and lasting, not a patch that fails again next month. Call (703) 832-9090 for upfront pricing on leak detection and repair.

Call (703) 832-9090

A leak is rarely just about the water you can see — it is about the damage you cannot. A running toilet quietly wastes thousands of gallons, and a hidden pinhole leak can rot a subfloor before you ever spot a stain. We track leaks to their source, fix the actual problem, and tell you straight whether it is a quick repair or a sign of something bigger.

What's included

Faucet & fixture repair

Dripping faucets, worn cartridges, leaking showerheads, and failing valves rebuilt or replaced for good.

Toilet repair

Running, rocking, or leaking toilets — flappers, fill valves, wax rings, and supply lines fixed fast.

Pipe leak repair

Leaking supply lines, joints, and fittings, from copper to PEX to galvanized, repaired or re-piped as needed.

Hidden leak detection

We trace leaks inside walls, ceilings, and under slabs without tearing your home apart guessing.

Shutoff valve replacement

Old or seized fixture and main shutoff valves replaced so you can control your water again.

Outdoor & hose bib leaks

Leaking spigots, hose bibs, and exterior lines repaired and freeze-protected.

Common signs you need this service

  • A faucet or showerhead that drips constantly
  • A toilet that runs or refills on its own
  • Water stains on ceilings or walls
  • A spike in your water bill with no change in usage
  • The sound of running water when everything is off
  • Warm spots on the floor or low water pressure

Our process

  1. 1

    Locate the leak

    We pinpoint the exact source — visible or hidden — so the repair targets the real problem, not a symptom.

  2. 2

    Quote upfront

    You get a clear price before we start, plus an honest read on whether it is a simple fix or part of a bigger issue.

  3. 3

    Make the repair

    We repair or replace the failed part with quality materials built to last, not a temporary patch.

  4. 4

    Test & verify

    We pressure-test and check the area to confirm the leak is fully resolved before we call it done.

Specific repairs & leaks services

Some of this work is involved enough to deserve a proper explanation of its own:

Why LeMaster Plumber

Neighbors you can count on

Upfront, honest pricing

You approve the price before we start — no surprises and no pressure. You’ll always know the cost before any work begins.

Licensed & insured plumbers

Every job is backed by proper training, the right permits, and a workmanship guarantee.

Respect for your home

We show up on time, protect your space, and leave the job cleaner than we found it.

★★★★★ on Google

Rated 5.0 stars on Google

★★★★★

“Extremely professional/ knowledgeable team. For the quality of work, you’d think they’d be charging double. Best plumbers in town sin duda.”

Matthew Flaherty · Google review
★★★★★

“LeMaster is great! Very professional and courteous. He resolved my issue within minutes and made sure the place was clean before leaving. They essentially treated my home like it’s their own. I definitely recommend LeMaster.”

David Speroni · Google review
★★★★★

“Quick response and worked with my schedule. Knowledgeable, personable with great communication. Amidst some unforeseen challenges they were committed to satisfying the customer. Highly recommended.”

Derek Wojciech · Google review

Read all our Google reviews →

Honest, upfront pricing

Leak repairs are quoted upfront before any work begins. Many small repairs are a flat, predictable price; hidden-leak detection is quoted after we assess the situation. You always approve the price first.

Ready to get started? Pick your own appointment time online.

Or call (703) 832-9090 — we answer 24/7.


Serving all of Fairfax, Loudoun & Prince William County

Fairfax County

  • Fairfax
  • Centreville
  • Chantilly
  • Vienna
  • Reston
  • Herndon
  • Burke
  • Springfield
  • McLean
  • Annandale

Loudoun County

  • Ashburn
  • Sterling
  • South Riding
  • Leesburg
  • Purcellville

Prince William County

  • Woodbridge
  • Dale City
  • Lake Ridge
  • Gainesville
  • Bristow
  • Haymarket

Also Serving

  • Arlington
  • Alexandria
  • Falls Church
  • Manassas
  • Manassas Park

See every city we serve →

Frequently asked questions

How do I know if I have a hidden leak?

Watch for a water bill that climbs with no change in habits, the sound of running water when everything is off, musty smells, warm spots on the floor, or stains on walls and ceilings. A simple test: note your water meter, avoid all water use for an hour, and check it again — movement means a leak somewhere.

Is a running toilet a big deal?

It is bigger than most people think. A toilet that runs can quietly waste hundreds of gallons a day and add up fast on your water bill. The fix is usually a quick, inexpensive flapper or fill-valve replacement, so it is well worth handling promptly.

Can you find a leak inside a wall without cutting it open?

In most cases, yes. We use the symptoms, moisture readings, and pressure testing to localize a hidden leak before opening anything, so any access we do make is small and targeted rather than exploratory demolition.

Why is my water bill suddenly so high?

A sudden jump usually points to a leak — most often a running toilet, a dripping fixture, or a hidden supply-line leak. We can track down the source and fix it so your bill comes back to normal.

Should I repair or replace a leaking faucet?

If the faucet is in good shape, a worn cartridge or washer is a simple, inexpensive repair. If it is old, corroded, or you have wanted to update it anyway, replacement may make more sense. We will give you both options and a price for each.

Get In Touch

Let's fix it together

Pick your own appointment time online in about a minute — or call for emergencies, or send a few details with the form and we'll get right back to you.

📞 Call (703) 832-9090