Slab leaks
Supply lines under a concrete floor corrode or shift until water spreads invisibly, surfacing as warm spots, damp carpet edges, or a meter that never rests.
Leak Services — Finding Hidden Water
The bill says water is leaving. The house says nothing — no drip, no stain, no sound. Leak detection is the discipline of finding water that hides: in walls, under slabs, and in the ground between the meter and your front door, located before anything is opened. See our full plumbing services in Pulaski, VA, or call (855) 913-0016 and describe what you are seeing.
Right Now
Start with the meter, tonight, yourself: close every tap, then look. If the meter's dial or leak indicator still turns, water is leaving the system somewhere — that single observation converts a suspicion into a case, and it costs you four minutes.
Then call (855) 913-0016 and report what the meter did. Note also anything else you have sensed: a spot in the floor that feels warm, a musty room, the sound of running water in a silent house at night. Detection begins with your evidence as much as with our instruments.
Common Problems
Visible leaks belong to repair. This page is for the ones that bill you without showing themselves.
Supply lines under a concrete floor corrode or shift until water spreads invisibly, surfacing as warm spots, damp carpet edges, or a meter that never rests.
Soft water and decades thin copper and galvanized from inside. A pinhole sprays a fine mist inside a wall cavity for months before the paint blisters.
The buried line from the town meter leaks into the ground — the yard may never even look wet if the soil drains toward Peak Creek's valley gravel.
A flapper passing tank water silently is the great impersonator of leak detection: the meter moves, the house looks innocent.
Pulaski's mill-era crawlspaces hide dripping joints and split lines that soak soil and joists where nobody looks twice a year.
Slow seeps at heater fittings and washer connections pool under units and wick into subfloors long before they drip visibly.
The Service
Detection is a sequence of narrowing tests, not a single gadget. It begins with meter isolation — proving whether the loss is inside the house, in the service line, or at a fixture — and proceeds by section: pressure testing runs, listening along lines, checking moisture in the materials the water would have to pass through.
You receive a located answer: the leak is here, in this run, at this fitting, caused by this. Only then does repair enter the conversation, with the opening sized to the fix instead of the search.
Meter moving with everything closed? That is a detection call, and the sooner the smaller the damage. Call (855) 913-0016.
Warning Signs
Hidden leaks leave indirect evidence. Collected, these signs usually name the neighborhood of the leak before we arrive:
| Sign | Likely cause | Urgency | Next step |
|---|---|---|---|
| Meter turns with all taps closed | Loss somewhere in the pressurized system | This week | Isolation testing to split house from service line |
| Water bill climbs with no new usage | A steady hidden loss, weeks to months old | This week | Full detection sequence |
| Warm or damp patch on a floor | Hot-side supply leak under the slab or floor | Soon | Thermal and acoustic pinpointing |
| Musty smell in one room only | Slow leak feeding hidden moisture | Soon | Moisture survey of that room's walls and floor |
| Running-water sound in a quiet house | A leak or a toilet passing water continuously | This week | Fixture elimination, then line tests |
| Yard strip stays green or soft in drought | Service line leaking into the soil | Soon | Service-line isolation and location |
Causes
The town's water is soft — roughly 42 mg/L by regional USGS-based estimates — and soft water corrodes old metal slowly and evenly. A galvanized or copper wall can thin for a decade before the first pinhole mist appears. Nothing dramatic happens; that is precisely why the leak gets months of privacy.
Architecture helps the hiding. Crawlspaces nobody enters, plaster walls that absorb and redistribute moisture, slab floors that wick water sideways — Pulaski's housing eras each provide their own concealment. Detection here is partly local knowledge: knowing which era hides leaks in which way.
Diagnosis
Step one separates the worlds: close the house valve and watch the meter to split service line from interior. Step two eliminates fixtures, toilets first. Step three pressure-tests sections of the interior runs. Step four listens — a pressurized leak makes a sound a trained ear and a listening disc can follow through floors and soil.
Only when the tests agree does anything open. If they point to a slab run, the options include rerouting the line through walls or attic — often a better answer than breaking concrete to save a corroded pipe's exact path.
Methods & Options
Every detection tool earns its place by shrinking the opening. These are the working methods:
Decisions
A located leak is a decision, not yet a repair. The right scope depends on what the pipe around the leak looks like and how it got there.
| What detection found | The fitting scope | Reasoning |
|---|---|---|
| One failed joint in otherwise sound pipe | Spot repair | The system is healthy; the joint was not |
| Pinhole in a run of thinned copper or galvanized | Replace the run | Its neighbors are the same age and thickness |
| Leak under a slab in a corroding line | Reroute the run overhead | Saves the floor now and the next leak later |
| Service line leaking at one fitting | Section repair, line tested | Prove the rest of the buried line before deciding more |
| 'Leak' was a toilet all along | Flapper service | The cheapest ending a detection can have |
Leak located but the scope feels large? Ask what the pipe around it showed — scope should trace to evidence. Call (855) 913-0016.
When It Cannot Wait
A thinned pipe's final act is often a burst — the pinhole becomes the split, usually at a freeze or a pressure spike. If your hidden leak has announced itself with moving water, close the shutoff and use the emergency pipe repair page. If it is still in its quiet, billing phase, you are in the right place and time is still yours.
Local Conditions
In the Historic District's houses, leaks hide in plaster and crawlspaces; the detection advantage there is knowing the original plumbing layout habits of 1900s construction — stacked bathrooms, shared walls, galvanized runs in predictable chases. In postwar houses, slab and low-crawlspace construction hides leaks under floors instead.
Service-line leaks have a Pulaski tell: valley soils can carry leaking water away downhill, so the yard may show nothing while the meter performs. That is why the meter test, not the eyeball, opens every case here.
Costs
Detection is priced by the search: a loss cornered by meter logic and fixture elimination is a short visit; one that needs slab acoustics and soil listening is longer. The repair that follows is priced by its own evidence — a spot repair, a run, or a reroute are different jobs sharing a diagnosis.
The expensive version of a leak is never the detection. It is the months of water, the subfloor, and the mold argument that grow while a suspicious bill is explained away. Finding it early is the savings.
How It Works
Isolation testing splits the loss: service line, interior, or fixture.
Toilets and fixtures dye-tested and valved out of suspicion.
Pressure tests vote run by run until one run loses.
Listening and moisture mapping shrink the location to the repair's size.
Location and cause reported before any repair is priced.
Spot, run, or reroute — chosen by the pipe's condition, with the finding in hand.
Prevention
Read your meter monthly and write the number down; a creeping baseline is a leak's earliest biography. Learn the leak indicator's look on a quiet Sunday when nothing is running — it should be still. Once a year, spend ten quiet minutes in the crawlspace or basement with a flashlight, looking for the drip that has not yet become a stain.
And treat any unexplained bill increase as a symptom, not a nuisance. Bills are the smoke; detection finds the fire while it is still small.
Choosing a Provider
Ask what the first test will be. The answer 'the meter isolation test' signals a method; 'we will start opening walls' signals the absence of one. Ask whether you will receive the location in writing with the cause — detection that ends in a shrug and a repair quote has skipped its purpose.
Ask, finally, whether the same company profits more from a bigger repair. At Pulaski-Plumber the detection report stands on its own: you can hold it, compare it, or act on it — the evidence belongs to you.
Keep Reading
Leak detection feeds two neighbors: emergency pipe repair when a thinned line lets go, and plumbing repair for the fixture-level failures the detection clears or convicts.
Why Consider Us
Pulaski houses were built to work, and most of them have been working for a long time. A plumber here needs to be comfortable opening a wall in an 1890s frame house on one call and tracing a 1960s ranch line on the next — and honest about which pipes are living on borrowed time. That is the standard Pulaski-Plumber works to: read the house first, then touch the wrench.
We also keep the town-versus-county line clear. If a problem sits in the town main, in a Pepper’s Ferry line, or on Pulaski County PSA ground, we tell you whose fix it is and what to say when you call them, rather than billing you for time spent on pipe that was never yours.
Galvanized threads, cast-iron stacks, and clay laterals behave differently from modern plastic. We diagnose by material and era, so a repair fits the system it joins instead of fighting it.
Homes along Peak Creek get flood-specific guidance — backwater valves, sump checks, and what to shut off before a storm — not generic tips written for flat, dry ground.
Meter readings, pressure numbers, and camera notes go down in plain language before we quote options. You can hand that note to a spouse, a landlord, or an insurer and it still makes sense.
Call (855) 913-0016 at any hour. First comes the shutoff step for the problem in front of you, then a visit timed to how fast the problem is actually moving.
Service Area
Pulaski is a one-ZIP town, and 24301 covers all of it — the brick and frame houses of the Historic Residential District, the creek-side streets in Kersey Bottom, the homes along Dora Highway and Randolph Avenue, the slopes below Draper Mountain, Sunset Hills, and the roads running out toward Claytor Lake. If your mailbox says Pulaski, you are in our working area.
ZIP codes served:
Don’t see your neighborhood or ZIP? Call (855) 913-0016 — we’ll confirm coverage right away.
Addresses just outside town limits — toward Draper, Newbern, or the lake — can sit close to our routes even when the ZIP differs. Call (855) 913-0016 any time, day or night, and we will confirm coverage for your exact address right away on the 24/7 line.
FAQ
It is the foundation of the whole method. A meter that turns with every fixture closed proves a pressurized loss beyond argument. What it cannot do alone is locate — that is what the isolation sequence, pressure tests, and listening are for.
The point of detection is that you should not. Tests narrow the leak to a run and then to a point; the opening that follows is the size of the repair. Walls opened for searching are the failure mode this service exists to prevent.
Into the ground from a service line, under the slab from a supply run, or down a drain from a passing toilet — the three quiet exits. Pulaski's downhill-draining soils can hide even a large service-line leak from the surface entirely.
It is the most common ending to a detection visit, and the happiest. A flapper passing water moves the meter exactly like a pipe leak. Dye testing clears or convicts every toilet early in the sequence, before line testing begins.
A supply line leaking beneath a concrete floor. Pinpointed acoustically, it is then either repaired through a small, targeted opening or — often wiser with corroded lines — rerouted through walls or ceiling so the failing path is abandoned entirely.
Slowly, yes. Soft water does not crust pipes the way hard water does, but over decades it thins galvanized and older copper from within. The leaks it causes arrive as pinhole clusters in old runs — a material reaching retirement, not a single defect.
A fixture impersonator can fall in under an hour. A slab or service-line loss that needs acoustic pinpointing takes longer. What we will not do is declare a location the tests have not earned — precision is the product.
If the meter spins briskly, yes — close the house valve and use water deliberately until the visit. If it creeps, normal use is fine. Either way, photograph the meter reading now; the numbers help the diagnosis and, if needed, a bill adjustment conversation with the town.
Many utilities, Pulaski's included, have processes for leak adjustments once a repair is documented — ask the Town of Pulaski water office what they require. Our written findings and repair notes are prepared to serve as that documentation.
You get the location, the cause, and the scoped options — spot repair, run replacement, or reroute — each priced from the evidence. The repair is a separate, calm decision, made with the water already understood.
Call Pulaski-Plumber with your meter's behavior in hand. The tests will narrow the loss to a point, and the repair will be sized to the finding — not to the fear.
Call (855) 913-0016 — 24/7