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Leak Detection and Repair in North Jersey

Some leaks announce themselves. Others quietly run for months behind a wall, under a slab or above a ceiling until the bill jumps or the drywall sags. Master's Plumbing locates hidden leaks in homes across Union, Essex, Bergen, Passaic, Hudson and Morris counties and repairs them properly, not with a patch that fails in a year.
Copper water supply lines and shutoff valves inspected for leaks in a North Jersey home

Much of the housing in our area was plumbed with galvanized steel before the war or with copper in the decades after, and both fail in predictable ways. Knowing what is inside the walls of a 1920s two-family in Irvington or a 1955 cape in Clifton is half of finding the leak.

Signs of a hidden water leak

  • A water bill that climbed with no change in how you use water
  • The water meter turning when every fixture in the house is off
  • Brown or yellow stains spreading on a ceiling or wall
  • Warm spots on a floor, or a floor that feels damp for no reason
  • The sound of running water when nothing is on
  • Musty smell, mold or peeling paint in one area
  • Low pressure at one fixture or one part of the house
  • Cracks in a basement floor that stay wet

How we find and fix leaks

  • Meter test and isolation

    We shut fixtures one at a time and watch the meter to prove there is a leak and narrow it to the hot side, cold side, or a single branch before opening anything.

  • Pinhole leaks in copper

    Copper installed from the 1950s onward develops pinholes from inside, usually on horizontal hot lines. We replace the failed section and tell you honestly whether the rest of the run is close behind.

  • Galvanized pipe corrosion

    Old galvanized supply lines rust from the inside, close down the flow and eventually weep at the threads. We repair the leak and quote a repipe if the pipe is near the end.

  • Ceiling leaks below bathrooms

    Tub drains, shower pans, toilet wax rings and supply connections all show up as a ceiling stain. We open the smallest access possible and find the actual source.

  • Slab and under-floor leaks

    Homes on a slab, and basements with lines under the floor, can leak into the ground. We locate the line, open the floor at the right spot, and repair or reroute overhead.

  • Fixture and appliance leaks

    Supply stops, braided connectors, dishwasher and ice maker lines, water heater fittings and outdoor hose bibs are common and quick to fix once found.

  • Drain and vent leaks

    Not every leak is on the pressure side. Cracked cast iron, failed slip joints and split PVC show up only when a fixture is used, which changes how we test.

What a leak detection visit looks like

  1. 1

    Tell us what you have noticed

    Where the stain is, when it appears, and whether the bill changed. If water is actively running, we walk you through the main shutoff on the phone.

  2. 2

    Test before we open anything

    Meter reading, pressure test and fixture-by-fixture isolation. Then we look, listen and feel along the most likely run.

  3. 3

    Firm price for the repair

    Once we know what failed and where, you get a by-the-job price for the fix and, if it applies, a separate option for replacing the rest of the run.

  4. 4

    Repair, test and clean up

    We make the repair in copper or PEX, pressurize and check it, and leave the opening as small and clean as the job allows.

Leaks in older North Jersey homes

The pre-war housing in Union, Essex and Hudson counties was largely plumbed in galvanized steel, which rusts from the inside until the threads weep or the pipe closes off. Homes from the 1950s through the 1980s are mostly copper, which lasts a long time but develops pinholes, particularly on hot lines and where the pipe was bent or run through masonry.

The fix for one leak in an old system is a repair. The fix for repeat leaks is a repipe, and we will tell you plainly which situation you are in rather than selling either one.

Why Master’s Plumbing

Why call Master's Plumbing for a leak

  • Small, targeted openings instead of tearing out walls on a hunch
  • Repairs in copper or PEX that match what is already in your house
  • Honest advice on whether the rest of the pipe is close to failing
  • 24/7 answer when a leak is active and doing damage
  • Upfront pricing for the repair before we start
  • Licensed, insured and bonded

Leak Detection across North Jersey

Master’s Plumbing is based in Roselle and provides leak detection & repair throughout Union County, Essex County, Bergen County, Passaic County, Hudson County, Morris County. Not sure if we cover your town? Call and ask, or check the full service area.

24/7 emergency line

Leak Detection emergency?

Call Master's Plumbing 24/7. A licensed technician will be dispatched with the price quoted before work starts.

Reviews

What customers say about our leak detection work

Real customers, real jobs across North Jersey.

4.8121 Google reviews
  • “I highly recommend Master's Plumbing! They provided outstanding service from start to finish. The technician was professional, quickly identified the issue, and fixed it efficiently. It's great knowing they offer 24/7 service, and they even honored the 10% discount on repairs mentioned on their card. I will absolutely use them again for any future plumbing needs in NJ.”
    Fares DwekatEmergency plumbing · via Google
  • “5 stars all around. Came out as quickly as possible and it was late night. Great customer service. And fixed my issue with tips for the future so that I can maintain my plumbing. Thanks!”
    Deva MedleyEmergency plumbing · via Google
  • “If you need work done and don't want to waste money on the same repair call Moe. Truly wished I found the company sooner, it would've saved me a lot of headache and expenses. When I called and explained my situation, without seeing the repair he already knew what needed to be done. He visited the same day and shortly after fixed a damaged pipe that could've taken out the lower half of my home. On site, Moe thoroughly explained the repairs needed at a reasonable cost. Polite, professional and truly knowledgeable.”
    Jennifer AndrePipe repair · via Google
  • “Master's was a godsend. We called late at night when our basement started flooding out of nowhere and Moe immediately came over. He was able to fix our issue and walked us through what caused it, what to expect, how to handle it if it happens again, and long term fix options. He was outstanding and I highly recommend Moe and Master's!”
    Kat SmithBasement flooding · via Google
  • “Masters Plumbing did a great job fixing my leaky drain in my kitchen sink and fixed the incorrect piping underneath. They were able to come out and do the job very quickly. Moe was very professional and courteous. Would use them again for any future issues!”
    Christian LaemmerhirtDrain repair · via Google
  • “Moe was absolutely amazing! I called Master's around 8:30 am and they arrived at the house by 9 am to fix a leaking pipe. Work was fast and well done. Super service and great price! Would definitely call again.”
    Chelsea HakenLeak repair · via Google

FAQ

Leak Detection & Repair questions, answered

How do I check for a leak myself?
Turn off every faucet and appliance, then look at your water meter. Most meters have a small triangle or dial that spins with any flow. If it moves with everything off, water is going somewhere. Also check the toilet by adding food coloring to the tank; if it shows up in the bowl without flushing, the flapper is leaking.
Do you have to cut open the wall?
Usually we open something, but the goal is to open the right spot once. Testing first means one small access hole near the leak rather than several exploratory ones.
Why does my copper pipe have pinholes?
A mix of water chemistry, velocity and age. Pinholes tend to show up on hot water lines first and cluster in the same area of the house. One pinhole is a repair; three in a year is a sign the run should be replaced.
My ceiling is stained but dry. Is the leak fixed?
Not necessarily. Tub and shower leaks only run when the fixture is used, so the stain can dry between showers. We test by running the fixture the way you would.
Can a leak be under my basement floor?
Yes, especially in homes where the water service or a branch line runs under the slab. Warm spots, a wet crack or a meter that never stops are the usual clues. Rerouting the line overhead is often cleaner than breaking the floor.

Master’s Plumbing

Need help right now?

Call Master's Plumbing any time. For non-emergency work, schedule online and we will confirm your appointment.

862-666-2155

Open 24 hours, 7 days a week · NJ Master Plumber Lic. #XXXXXXXX4200

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