A Triangle slab leak is a water or drain pipe leaking inside or beneath concrete, usually a townhouse ground floor, a basement slab or a garage. Prince William Water supplies Triangle and locates its lines from the main through the meter box; lines on private property are the owner's. Call the number on this page to be connected with a local plumber in Triangle.
Triangle conditions
Triangle sits in southeastern Prince William County, wedged between Dumfries, Prince William Forest Park and Marine Corps Base Quantico. Its housing is mostly newer, with a median year built of about 1999, so supply lines are generally copper or PEX in fair condition. When a slab leak does happen in a home this age, it is often a fitting that loosened, pipe damaged when the slab was poured, or copper wearing against gravel, rather than pipe that has simply aged out.
Prince William Water names Triangle among the eastern county communities it supplies with Occoquan Reservoir water. The utility uses chloramine most of the year and switches to free chlorine in spring, and it rates its water as moderately hard. Neither is a common cause of buried leaks. Its responsibility runs from the main through the meter box, and it states that all the service lines it owns are non-lead; everything on private property is the owner's. Virginia American Water also runs a separate Prince William system nearby, so check your bill if you are unsure who supplies you. Prince William Water's emergency dispatch line is 703-335-7990.
Repair paths compared
| Path | When it fits | Trade-offs |
|---|---|---|
| Cut and repair | One leak, located precisely, in otherwise sound pipe | Slab cutting and patching, plus new flooring over the spot |
| Reroute | A leak under tile, cabinets or a finished floor | Pipe moves into walls or ceilings; drywall patching instead of concrete |
| Partial repipe | More than one leak on the same buried run | More work up front, fewer surprises later |
Warning signs
- A leak indicator that turns with all water off
- Warm floor along a path from the water heater
- Damp baseboards or carpet on the lowest level
- A bill that jumps with no change in use
Timing
Once the meter test fails, have the leak located within days. Water under a slab can soak flooring and framing and draw moisture into finished spaces. Prince William County's Building Development Division handles permits for unincorporated Triangle, and its guidance ties a plumbing permit to extending water piping more than 10 feet or changing the pipe material, so ask whether a reroute will need one.
Slab Leak Repair questions in Triangle
Should I call the water utility or a plumber first?
My home is fairly new. Can it still have a slab leak?
Does slab leak work need a permit here?
Water is seeping up through my basement floor. Is it groundwater or a pipe?
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