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Lebanon Plumbers, home

Leak Detection & Pipes

Leak Detection

Finding the leak accurately is what keeps the repair small. Guessing is what turns one hole in a wall into three.

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What is included

What this service covers

What we actually do on this job, and what you can expect us to deal with while we are there.

  • Tracing leaks behind walls, under floors and above ceilings
  • Slab leak location
  • Buried supply and irrigation line leaks
  • Meter testing and isolation to confirm a leak exists
  • Pinpointing before opening up, to keep access small
  • Identifying whether the source is supply, waste or groundwater

Signs to look for

You may need this if you are seeing any of these

  • A water bill that has climbed with no change in habits
  • The water meter moving with every fixture turned off
  • A running or hissing sound when nothing is on
  • Damp, staining, bubbling paint or a musty smell
  • A warm patch on a floor slab
  • Loss of pressure with no obvious cause
  • Mould appearing in a spot that keeps returning

Why it happens

What usually causes it

01

Pinholes in aging copper

Water chemistry and flow velocity thin the pipe wall over decades until it weeps. These leaks are small, slow and often run for months inside a wall before anything shows on the surface.

02

Failed joints and connectors

Compression fittings, appliance supply hoses and older soldered joints all give up eventually, and the ones inside cabinets or behind appliances go unnoticed longest.

03

Galvanized reaching the end

Common in older Lebanon city housing. Corrosion thins the wall from the inside, and the first sign is often a damp patch rather than a burst.

04

Movement under a slab

Ground movement, poor bedding or a line rubbing against concrete wears through a supply pipe under a floor slab, where nothing is visible until the floor is warm or damp.

Our approach

How we handle this job

Specific to this work rather than a generic checklist bolted onto every page.

  1. 01

    Confirm there is actually a leak

    Everything off, then watch the meter. A moving meter with no draw proves water is escaping and separates a genuine leak from condensation or a roof problem, which are different trades entirely.

  2. 02

    Narrow it down by isolation

    Shutting off sections of the system and re-testing tells us which part is losing water before anyone opens anything. This step is what keeps the eventual access small.

  3. 03

    Pinpoint the position

    Acoustic listening, pressure testing and thermal differences are used to locate the point rather than the general area, and the position gets marked.

  4. 04

    Explain the repair options

    You get told what was found, where, and what fixing it involves, including whether rerouting the run is cheaper than accessing it in place.

The meter test, before you call anyone

There is one check worth doing before spending money on leak detection, and it costs nothing.

Turn off every water-using thing in the property: taps, appliances, ice makers, humidifiers, irrigation. Then look at the water meter. If the dial or the leak indicator is still turning, water is escaping somewhere in your system. If it is completely still, whatever is happening is probably not a supply leak, and you may be looking at condensation, groundwater or a roof problem instead.

That single test decides whether this is our job at all, and we would rather you knew before booking.

A plumber using acoustic listening equipment on a tiled floor to trace a hidden water leak

Why locating properly is the cheap part

The temptation on a damp patch is to open up the wall behind it. The problem is that water travels: it runs along joists, follows pipe runs and drops through at the first opportunity, so the visible damage is frequently nowhere near the failure.

Isolating the system section by section, then pinpointing acoustically or by pressure, turns a search into a marked spot. The detection work usually costs less than the extra repair and restoration caused by opening the wrong place twice.

An electric pressure testing pump connected to rough-in copper pipework in a stud wall

Older housing, older failure modes

In the pre-war housing across Lebanon city, the recurring find is galvanized supply thinning from the inside and copper of a certain age developing pinholes. Both leak slowly for a long time before they announce themselves.

Where a run has already failed once and the rest of it is in the same condition, we will tell you that repairing this one spot is buying a few months. Sometimes rerouting a run in accessible pipe is genuinely cheaper than chasing failures through plaster, and that is covered on the pipe repair page.

Questions

Leak detection questions

Specific to this job. Every service page here has its own, none repeated.

General FAQ

Common questions

How can I tell if I have a hidden water leak?
The most reliable check is free and takes ten minutes. Turn off every tap, appliance and ice maker in the property, then look at the water meter. If it is still moving, water is leaving the system somewhere. Beyond that, the common signs are a bill that has climbed without a change in habits, a running or hissing sound with everything off, damp or staining that keeps returning, a musty smell, and an unexplained drop in pressure.
Can you find a leak without tearing open walls?
That is the entire point of doing detection before repair. We isolate sections of the system and use acoustic listening, pressure testing and temperature differences to narrow the position down before anything is opened. It does not always avoid access completely, because the repair itself may need it, but it is the difference between one small planned opening and several exploratory ones.
What is a slab leak and how would I know?
A leak in a supply line running under or within a concrete floor slab. The signs are distinctive: an unexplained warm area on the floor if it is the hot line, damp appearing at the edge of the slab or through flooring, the sound of running water with everything off, and a meter that keeps moving. They are worth acting on quickly, because water under a slab undermines what is sitting on it.
Can a small leak really cause serious damage?
Yes, and slow leaks routinely cause more damage than dramatic ones because nothing forces you to deal with them. A pinhole weeping inside a wall cavity for months will rot framing, ruin insulation and grow mould long before anyone notices a stain. The cost of finding it is small against the cost of the repairs that follow from not finding it.
My bill went up but I cannot see anything. What now?
Do the meter test first, because it tells you whether you are looking for a leak at all. If the meter is still, the increase is more likely usage, a rate change, or a billing issue, and there is nothing for us to find. If it is moving, we can help. A running toilet is the most common culprit and the easiest thing to rule out: add a little food colouring to the tank, wait twenty minutes without flushing, and if colour appears in the bowl the flapper is passing water.
Do you find leaks in buried water lines and irrigation?
Yes. Buried supply lines between the meter and the house, and irrigation lines, both leak without any visible sign indoors. The clues outside are a patch of grass that is greener or wetter than the rest, an area that stays soft in dry weather, or gravel and paving that keeps subsiding. These are located from the surface before any digging.
Is the leak covered by my insurance?
Sudden accidental discharge is commonly covered while long term seepage commonly is not, which is precisely why finding a slow leak early matters financially as well as structurally. Your policy decides it. We can provide a factual written description of what we found and where, which is what an insurer will want, but we cannot tell you what you are covered for.

Related services

Where we cover for this

All service areas

Ready when you are

Need leak detection in Lebanon County?

Tell us what is going wrong. We come out, look at it properly, and give you the price before anything starts.

  • Licensed and insured
  • Residential and commercial
  • Price agreed before work starts

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(717) 000-0000

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