Leak Repair Across the Bay Area
Once a leak has been located, the question is how to fix it properly. We repair slab leaks, pinhole copper, failed sections of supply pipe and wall or ceiling leaks across 15 Bay Area cities, then put the finishes back. Where a pipe run has failed more than once, rerouting is usually the better answer than another spot repair.
Not sure where the water is coming from yet? Start with leak detection and we will pinpoint it before anything is opened up.
- Slab leak repair by open access, or rerouting above the slab
- Pinhole and pitted copper repairs
- Replacing a failed section of supply line
- Wall and ceiling leaks, including drain and vent pipe
- Angle stop, valve and fitting leaks
- Hot water recirculation line repairs
- Drywall, stucco and concrete made good afterwards
Leaks We Are Called Out To Repair
Catching these early is almost always cheaper than waiting for the failure.
A Warm Patch on the Floor
A section of floor that is warm underfoot, often with the water heater cycling more than it should, points to a hot side slab leak. Where a run has already failed once, we normally recommend rerouting it above the slab rather than breaking out concrete a second time.
Running Water With Everything Off
If you can hear water moving when no tap is open, something is leaking under pressure. Close the main and watch the meter dial. If it keeps turning, the loss is on your side of the meter and it needs finding and repairing rather than monitoring.
Green or White Crust on Copper
Verdigris or a chalky bloom at a joint or along a run is copper giving up. Pinholes rarely arrive alone. Where we find several on the same line, patching each one in turn tends to cost more over a year than replacing the section outright.
A Stained or Sagging Ceiling
A brown ring on a ceiling below a bathroom is usually a supply fitting, a shower pan, a waste connection or a failed toilet seal. It needs opening up to identify which, because water often travels along a joist and drips well away from the source.
Bubbling Paint or Soft Skirting
Damp inside a wall shows up as blistered paint, a soft baseboard or a musty smell long before anything visibly drips. Behind it is usually a pinhole in a wall run, a leaking angle stop, or a shower valve weeping quietly into the cavity.
Leaks That Follow the Seasons
Expansive clay soil across much of the East Bay swells and shrinks through the year, and that movement works on rigid pipe cast into or buried under a slab. Leaks appearing after a long dry stretch, or hairline cracking arriving with a damp patch, often trace back to it.
Repair Options We Will Talk You Through
Spot Repair
Where the leak is a single point on otherwise sound pipe, we open the smallest access we can, cut out the damaged piece and make a proper joint. On a slab leak that means breaking a limited area of concrete, repairing, then filling and patching. It is the least disruptive option when the rest of the run is healthy.
Reroute Above the Slab
When a pipe under concrete has failed more than once, we abandon that run and take a new line through the attic, a wall or a ceiling to reach the same fixtures. No further concrete work, and the new pipe stays accessible for the rest of its life. In single storey homes with a workable attic this is often the cleanest fix.
Replacing the Failed Section
If a whole run is pitted, or the pipe is old galvanized that has closed up with corrosion, replacing the section is the honest answer. We isolate, remove the failing pipe and run new, sized to keep pressure where it should be at every fixture rather than just the nearest one.
Fitting and Valve Replacement
Plenty of leaks are not the pipe at all. Angle stops that will not seat, compression fittings that have been over tightened, supply lines that have hardened and split, or a hose connection weeping behind a machine. These are quick repairs and always worth ruling in or out before anything is opened up.
How We Repair a Leak
Confirm the Source Before Cutting
Even when detection has already narrowed it down, we verify at the point of repair before opening anything. Isolating zones, pressure testing and watching the meter tells us we are cutting into the right pipe and not chasing water that has simply travelled.
Agree the Repair and the Access
You see the options, spot repair or reroute, what has to be opened up, what gets put back and the price for all of it before we start. Nothing begins until you approve it, and there is no overtime charge if the work has to happen at night.
Isolate and Make the Repair
We shut down the smallest section we can so the rest of the house keeps water where possible, cut out the failed pipe and make a proper joint rather than clamping over the damage. New pipe is supported and protected where it passes through framing or concrete.
Pressure Test Before Closing Up
The repaired section is brought back up to pressure and held while we check every joint and watch the meter. Closing a wall over an untested repair is how people end up paying for the same job twice, so this step never gets skipped.
Dry Out and Restore
Wet cavities and soaked insulation are dealt with before any finish goes back, because trapped damp behind new drywall turns into mould. Then we patch drywall, stucco or concrete so the repair is not left as a hole for somebody else to deal with.
Repairing the Leak, Not Just the Symptom
A leak repair is only as good as the decision behind it. The same wet patch can be one tired fitting or the second failure on a run that will keep failing. We look at the age and material of the pipe, how many repairs it has already had and what caused it to fail, then tell you whether a spot repair or a reroute is the sensible spend. Repeat call outs to the same wall serve nobody.
Slab leaks deserve particular care in this part of California. Much of the East Bay sits on expansive clay that moves with the seasons, and homes built on grade have supply lines cast into or buried beneath the concrete. Eichler homes in Sunnyvale and Palo Alto are the extreme case, with plumbing set into the slab and no crawl space to work in. Where access is that difficult, rerouting above the slab is usually faster, cleaner and more durable than breaking concrete.
Pinhole leaks in copper follow a pattern. They tend to start on the hot side, cluster on the same run and arrive in twos and threes across a season. Causes range from water chemistry to velocity in undersized pipe to poor electrical grounding. Once we have seen three on one line, we will say plainly that patching is not the economical route, and price the section replacement so you can compare the two properly.
Homes built before 1960 across Oakland, Berkeley, Hayward and San Leandro were plumbed in galvanized steel. That pipe corrodes from the inside, narrows, and eventually weeps at the threads where the wall is thinnest. Threaded repairs on brittle galvanized frequently crack the next fitting along. Where we open a wall and find it, we will show you the pipe and let you decide whether to keep patching or move that section over to copper or PEX.
What Affects the Price
We quote every job up front, so you approve the price before anything starts. These are the things that move it:
- Where the leak sits, since an exposed pipe in a garage is a very different job to one under a slab
- Whether the fix is a spot repair, a reroute or replacing a whole section
- Pipe material and age, as brittle galvanized and pitted copper often need more replaced than expected
- How much has to be opened up, and whether that is drywall, tile, stucco or concrete
- Restoration required afterwards, including patching, texture and finish matching
- Whether the area needs drying out before it can be closed up
- Access and working space around the failed pipe
Most quotes are free and can be done from photos or video you send us. Some on-site estimates carry a fee based on distance, and we tell you that before we come out.
Keeping Leaks From Coming Back
Pressure running high stresses every joint, valve and flexible connector in the house. If your street pressure is high with no pressure reducing valve, or the existing one has failed, fitting or replacing it protects the whole system.
The braided and plastic lines feeding taps, toilets and washing machines harden with age and split without warning. Swapping them when you notice them going stiff is far cheaper than the flood that follows one letting go.
With every fixture off, note the meter reading, wait an hour and read it again. Any movement means water is going somewhere it should not. It is the simplest test there is and it catches slow losses early.
Shutoff valves under sinks and toilets seize solid if they are never turned. Exercising them once a year keeps them usable in an emergency and shows up the ones already weeping at the packing nut.
A musty smell, a soft patch of floor or paint that keeps blistering is water, not decoration. Getting it looked at while it is still a stain costs far less than after it has reached the framing.
Leak Repair — Frequently Asked Questions
Straight answers, without the sales pitch.
Can a slab leak be repaired without breaking the concrete?
Often yes. Rerouting takes a new line above the slab through the attic, walls or ceiling to serve the same fixtures, leaving the failed pipe abandoned in place. It avoids concrete work altogether and leaves you with accessible pipe. Breaking out is still the right call for a single isolated failure on otherwise sound pipe close to an edge.
Do I need to fix a small leak straight away?
Yes. Water under pressure does not stay small, and the damage is rarely the repair itself. A pinhole soaking a wall cavity feeds mould, rots framing and ruins insulation long before it drips visibly, and it runs up the water bill the whole time. A minor repair now is almost always the cheaper path.
Will you put the wall back afterwards?
We patch what we open. Drywall, stucco and concrete are made good as part of the repair, and we discuss finish and texture matching before we start so there are no surprises. Where a room needs full drying, or damage has spread beyond the immediate repair, we tell you that up front rather than after.
How do you know you have found the actual leak?
We verify before cutting rather than trusting a single reading. Isolating sections and pressure testing each one narrows the loss to a single run, and the meter confirms whether the loss stops when that section is shut. Water travels along joists and under flooring, so the wet patch is often nowhere near the source.
Should I repipe instead of repairing?
It depends on how the pipe is failing. One pinhole on sound copper is a repair. Several on the same run, or corroded galvanized that has narrowed with age, is a system telling you it is finished. We will price both so the decision is genuinely yours rather than ours, and explain what we have seen inside the pipe.
Is a leak covered by home insurance?
Policies commonly cover the resulting damage but not the failed pipe itself, and terms vary a great deal between insurers. We document what we find with photographs and provide a clear written description of the cause and the repair, which is what adjusters ask for. Check your own policy wording before assuming either way.
Do you charge extra for nights, weekends or holidays?
No. We do not add overtime charges, ever. The rate you are quoted is the same whether we come out on a Tuesday morning or at 2am on a holiday weekend.
Are you licensed and insured?
Yes. Power Plumbing USA holds California contractor license #1082507 and carries full liability insurance. All work is performed to California Plumbing Code, and we pull permits where the job requires them.
Where We Provide This Service
We cover 15 Bay Area cities from our Union City base. See the full service area →