A slab leak is a leak in a water line that runs through or beneath the concrete foundation. A pinhole leak is a tiny perforation in copper pipe caused by corrosion. In older Delray Beach homes the two go hand in hand: aging copper develops pinholes, and when it happens under the slab, the water has nowhere to go but into the foundation and floors.
Why Delray Beach copper fails
Much of Delray’s housing — single-family homes and the many low-rise condos — dates to the 1960s and 1970s and was plumbed with copper supply lines. Copper is durable, but after 50-plus years, and especially in a humid, salt-influenced coastal environment, it’s prone to pitting corrosion that eats through the pipe wall and produces pinhole leaks. Water chemistry, high velocity, and the years all add up.
When that corrosion hits a line embedded in or under the slab, a slow leak can run for a long time before it’s obvious — which is why early detection matters.
Signs of a slab or pinhole leak
- An unexplained jump in your water bill
- The sound of running water when everything is off
- Warm spots on the floor (a hot-water line leak)
- Cracked or buckling flooring, or damp/musty areas
- Low water pressure or the water heater running constantly
- A meter that keeps moving with all fixtures shut off
Plumbers use electronic leak detection — acoustic listening, pressure testing, and thermal imaging — to pinpoint the leak before opening any concrete.
Repair options — and when a repipe makes sense
- Spot repair: open the slab at the leak and fix that section. Lowest upfront cost, but in old copper, the next pinhole may not be far behind.
- Reroute: abandon the failed under-slab segment and run a new line overhead through walls and attic, avoiding the slab.
- Whole-home repipe: replace the aging copper system in PEX or new copper. Once a home starts producing repeat pinhole leaks, many owners repipe rather than chase one leak at a time. Slab-leak repair and repiping are closely paired decisions.
Condos & HOAs: know who owns the pipe
In Delray’s many condos and HOA communities, responsibility for a leak depends on where it is and what the governing documents say. Lines inside your unit are often the owner’s responsibility, while shared or common-element lines may fall to the association. Before authorizing major work, check your declaration and notify the board or property manager — it affects who pays and who must approve the repair.
What it costs in Delray Beach
| Scope of work | Directional planning range |
|---|---|
| Electronic leak detection / diagnosis | $150 – $600 |
| Single slab-leak spot repair | $1,500 – $5,000+ |
| Reroute one line (avoid the slab) | $1,000 – $4,000+ |
| Whole-home repipe (PEX or copper) | $6,000 – $18,000+ |
Permits & who can do the work
Slab-leak repair and repiping are permitted work in Florida. In Delray Beach the permit and inspections run through the City building department (the AHJ); homes in unincorporated areas go through Palm Beach County, and condos may add association approval. Use a Florida state-licensed plumbing contractor — they pull the permit and schedule inspections. Confirm current fees with the City or County.
Pin down your slab-leak situation
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Frequently asked questions
Why do older Delray Beach homes get pinhole leaks?
Homes and condos from the 1960s and 70s were plumbed with copper, and after 50-plus years in a humid, salt-influenced coastal environment that copper is prone to pitting corrosion. The corrosion eats through the pipe wall and produces pinhole leaks — under the slab, those become slab leaks.
How do I know if I have a slab leak?
Common signs are an unexplained jump in your water bill, the sound of running water with everything off, warm spots on the floor, damp or buckling flooring, low pressure, and a water meter that keeps moving when all fixtures are shut off. A plumber confirms it with electronic leak detection before opening concrete.
Should I just repair the leak or repipe the whole house?
A spot repair is cheapest upfront, but in old copper the next pinhole may not be far behind. Once a home starts producing repeat pinhole leaks, many owners reroute the line or repipe in PEX or new copper rather than chase one leak at a time. Slab-leak repair and repiping are closely paired decisions.
Who pays for a slab leak in a condo or HOA?
It depends on where the leak is and what your governing documents say. Lines inside your unit are often the owner’s responsibility, while shared or common-element lines may fall to the association. Check your declaration and notify the board or property manager before authorizing major work.
How is a slab leak located without tearing up the floor?
Plumbers use electronic leak detection — acoustic listening, pressure testing, and thermal imaging — to pinpoint the leak first, so only the affected area of slab is opened. This keeps the repair targeted.
Do I need a permit in Delray Beach?
Yes. Slab-leak repair and repiping require a permit and inspections through the City of Delray Beach building department (or Palm Beach County for unincorporated areas), and condos may add association approval. Your licensed plumber normally handles the permit. Confirm current fees with the AHJ.
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