Hidden Leak Detection in Florence, SC: Meter Checks, Wall Moisture and Finding the Source

Signs of a hidden leak: bills, meters and damp patches

Most hidden leaks announce themselves the same handful of ways, and the earlier ones are easy to dismiss.

• A water bill that rose with no change in how much water you use
• The meter moving when every fixture in the house is closed
• The sound of water running with nothing turned on
• A damp patch, a stain that returns after painting, or paint bubbling on a wall
• A musty smell in one room that does not clear
• Reduced pressure across the whole house rather than at a single tap
• An area of floor that is warm, soft or discoloured
• Vegetation growing noticeably faster in one strip of the yard

The meter test, which you can do before calling

Close every fixture, read the meter, wait a set interval using no water, then read it again. Movement means the house is losing water. That single test saves a lot of guessing and costs nothing.

If you can find the shutoff where the supply enters the house, closing it and repeating the test tells you something further: if the meter still moves with the house isolated, the leak is between the meter and the house rather than inside it.

Acoustic listening and thermal imaging for leak location

Acoustic listening is the core method. Water escaping a pressurised pipe makes a characteristic sound that travels through pipe, soil and concrete, and ground microphones pick it up. It is precise in the right conditions and poor through thick or loose fill.

Thermal imaging finds temperature differences rather than sound, so it is strong on hot lines and on damp areas cooler than their surroundings, and it reads surfaces rather than depths.

Pressure testing isolates sections to establish which line is losing water before anyone listens for it, and tracer methods are available for the cases the first three cannot resolve.

Leaks inside walls and behind tile

A supply line inside a wall leaks under constant pressure, so it does not wait for anyone to use a fixture. The usual signs are a stain that keeps returning, paint bubbling, or a baseboard that has lifted.

Behind tile the signs are subtler: grout that stays dark in one area, or a tile that sounds hollow when tapped. Finding the exact point matters more here than anywhere, because the cost of opening the wrong section of tiled wall is substantial.

Ceiling leaks, and telling plumbing from roof

Water at a ceiling is the one symptom with two completely different sets of causes, and the diagnosis is worth getting right before anyone is called out.

Plumbing leaks run constantly or follow fixture use, show up directly below a bathroom or a supply run, and do not care about the weather. Roof leaks appear during or shortly after rain, often some distance from where water enters because it tracks along framing first.

The timing test is the useful one: if the stain grows on a dry week, it is plumbing. If it only moves when it rains, the problem is above the ceiling rather than in the pipes, and that is roofing work rather than ours. We will tell you that rather than billing for a leak hunt that was never going to find anything.

Leaks under floors and in crawl spaces

Under a crawl space, a leak can run for a long time without anyone noticing, which is why crawl space lines are worth inspecting periodically rather than waiting for a symptom. The usual first sign is a bill, not a puddle.

Under a concrete slab the symptoms differ: a warm patch, flooring that lifts, and the sound of water with everything closed. Slab leaks have their own page because the repair decisions are different.

Pinhole leaks in copper, which rarely come alone

A pinhole in a copper line is a small hole from corrosion working outward from inside, and it matters more than its size suggests. Where water chemistry or velocity has caused one, it has usually been working on the rest of that line too.

So a single pinhole is worth treating as information rather than just a repair. If the line is original and a second one follows within a year or two, that is the point to look at replacing the run rather than patching it a third time.

Yard and service line leaks

Between the meter and the house, a leak shows as an unexplained bill, a soft or unusually green strip of lawn, or water surfacing somewhere with no obvious source.

These are located acoustically from the surface, and a correlator can be used on longer runs to narrow the position before any digging. That matters because the excavation is the expensive part of a service line repair, not the pipe.

Anything that involves digging needs utility locating done first, without exception. That applies to us and to anyone else putting a shovel in the ground.

Irrigation, pools and spas

Irrigation systems leak quietly because they run on a schedule, often at night, so nobody watches them. A zone that stays wet between cycles or a head that weeps constantly will not show as a dramatic symptom, only on the bill.

Pools and spas lose water to evaporation normally, so the question is always whether the loss exceeds that. The bucket test separates the two before anyone goes looking for a structural or plumbing leak in the circulation system.

What this page does not cover

Gas leaks are detected differently and are covered on their own page, because the safety sequence comes first and the equipment is not the same. If you can smell gas, leave the building and call from outside rather than reading further.

Roof and gutter leaks, as above, are not plumbing work. We will help you tell which you have, and we are straightforward about it when the answer is that you need a roofer.

Commercial leak detection

In a commercial building the economics are different, because a leak that would be a nuisance at home is a closed business or a damaged stock room. Detection usually has to be non-invasive and done outside operating hours.

Larger buildings also have more line to search, so pressure isolation matters more than it does in a house. Narrowing which riser or which zone is losing water before listening is most of the job.