Slab leaks can be difficult to identify because supply or drain lines may run beneath a concrete floor. These signs can have other causes, so inspection matters.
Warm or damp floor areas without an obvious source.
Unexplained increases in water use or the sound of running water when fixtures are off.
Recurring moisture, flooring damage, or mildew-like odors.
A professional may use suitable testing methods to determine whether a concealed pipe is leaking.
When to contact a professional
If the source is unclear, the leak continues, or pipe access requires opening walls or floors, arrange an assessment from an appropriately qualified plumbing professional. Do not take risks around electrical hazards, structural damage, or contaminated water.
More resources
- Burst pipe repair guidance
- Frozen pipe repair guidance
- Slab leak repair guidance
- Main water shutoff help
This article provides general educational information, not a remote diagnosis. Conditions vary by property and should be assessed by an appropriate professional.