In Knightdale, a slab leak is a water supply line leaking under a concrete floor, and the line from the property line to the house is the owner's responsibility. A plumber confirms the leak, finds it, then repairs the spot or runs a new line above the floor. Call the number on this page to be connected with a local plumber in Knightdale.
Knightdale homes and water service
Knightdale is mostly new construction. About 74% of its homes have been built since 2000, the median is 2008, and only about 6% predate 1980, per Census survey data. A slab leak in a house this young usually traces to a fitting, a damaged section of pipe or a line under stress where it passes through the concrete rather than to worn-out pipe. Foundations in eastern Wake subdivisions vary, so confirm whether your house is on a slab before assuming the leak is under concrete.
Knightdale's water and sewer are owned and operated by the City of Raleigh. Raleigh maintains water lines up to the property line, and from there to the house, including pipe under the slab, is the owner's responsibility. The water is soft, about 25 ppm hardness, and treated with chloramine except for a chlorine-only period of about six weeks each spring, according to Raleigh's 2025 report.
Ways to fix it
| Method | How it works | Trade-off |
|---|---|---|
| Direct repair | The plumber opens the floor over the leak and replaces the bad section | Requires cutting and patching concrete and flooring |
| Line reroute | The buried pipe is capped and a new line goes through walls or the attic | Leaves the slab alone but involves drywall repair |
| Partial repipe | Several buried runs are replaced at once | More work up front; worth it if more than one line is failing |
Signs to take seriously
- A Raleigh Water bill noticeably higher than the same month last year
- Meter flow with everything shut off
- A warm patch of floor, often near the kitchen or a bathroom
- Moisture or mildew at the base of interior walls
- A hot water heater that seems to run constantly
When it tends to show up
Many homeowners first notice a slab leak in colder months, when a warm spot on an otherwise cold floor stands out and the heater's extra run time is noticeable. In summer, irrigation can mask the bill, so test with sprinklers off. Plumbing inspections in Knightdale are done by Wake County Permits and Inspections on behalf of the town, through the Wake County permit portal, if the job needs a permit.
Slab Leak Repair questions in Knightdale
Who pays to fix a leak between the water meter and my house?
Our house is fairly new. Why would it already have a slab leak?
How can I find out whether my home was built on a concrete slab?
Can a slab leak wait a few days, or should I call now?
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