Slab Leak Repair
A slab leak develops when a pressurized water pipe beneath a concrete foundation begins leaking. Because the damaged line is hidden under flooring and concrete, water may continue escaping for a long time before the source becomes obvious.
The first signs may include warm flooring, unexplained water usage, the sound of running water, reduced pressure, damp areas, damaged flooring, or moisture around the foundation. In other cases, the only early warning may be a water bill that suddenly increases without a change in normal household use.
RDZ Plumbing and Drains provides professional slab leak detection and repair for homes, rental properties, commercial buildings, and multi-unit properties throughout San Diego. Our plumbers evaluate the symptoms, locate the affected pipe as accurately as possible, and recommend a repair method based on the location, accessibility, plumbing material, and overall condition of the water system.
Depending on the situation, the solution may involve direct access through the slab, rerouting the damaged water line, replacing a larger pipe section, or repiping part of the property.
Get A Free Quotes
What Is a Slab Leak?
Many properties are built on concrete slab foundations. Water supply lines may run beneath or through the slab before connecting to kitchens, bathrooms, laundry areas, water heaters, and other fixtures.
When one of these pipes cracks, corrodes, separates, or develops a small opening, pressurized water escapes into the soil or surrounding material beneath the foundation.
A hot-water slab leak may create warm areas on the floor. A cold-water leak may be more difficult to notice and may first appear through increased water consumption, reduced pressure, or unexplained moisture.
Because water can travel beneath the slab before becoming visible, the location of damaged flooring or moisture does not always match the exact position of the leaking pipe.
Professional detection is important before concrete or finished flooring is removed.
Signs of a Possible Slab Leak
Slab leaks often begin with subtle changes rather than an obvious flood. Water may escape underground without immediately entering the living space.
One of the most common warning signs is the sound of water moving when every faucet, appliance, irrigation system, and plumbing fixture is turned off. The water meter may also continue registering usage while the property is not actively using water.
A leaking hot-water pipe may create a warm section of tile, wood, laminate, or carpet. Over time, flooring may become discolored, warped, loose, or damp.
Other possible symptoms include:
- An unexplained increase in the water bill
- Warm or damp flooring
- Reduced water pressure
- Water collecting near the foundation
- Cracked, lifted, or damaged flooring
- Musty odors or unexpected moisture
- The sound of running water inside the floor
- Water-meter movement when fixtures are off
- Repeated activation of the water heater
- Moisture appearing around baseboards or lower walls
These symptoms can also be caused by other plumbing or moisture problems. Professional testing helps confirm whether the leak is actually located beneath the slab.
Professional Slab Leak Detection
Finding a slab leak should begin with diagnosis rather than immediate demolition.
Our plumbers review the symptoms, check accessible plumbing, evaluate the water meter, and determine whether an active supply-line leak is likely present.
The system may be pressure-tested or divided into sections to narrow down whether the problem involves a hot-water line, cold-water line, or specific plumbing branch.
Professional detection methods may include acoustic equipment that listens for escaping pressurized water, thermal imaging that identifies temperature differences, pressure testing, and targeted inspection of the plumbing layout.
No single method is ideal for every property. Detection is often a process of combining several observations until the affected line and likely leak location have been identified.
Once the area has been narrowed down, we explain the available repair options and the amount of access each method may require.