Slab Leak Diagnosis
Inspection of suspected leaks in water lines running beneath or through the concrete foundation of a home.
Yard and Slab Leak Detection and Repair in San Antonio, TX
A hidden water leak can waste a significant amount of water and damage flooring, cabinets, landscaping, and other parts of your property. Because yard and slab leaks are often concealed underground, the first sign may be an unusually high water bill, reduced water pressure, or moisture appearing where it should not.
Lujan Plumbing provides professional yard and slab leak diagnosis and repair for homeowners throughout San Antonio and the surrounding area. We inspect the plumbing system, narrow down the source of the leak, and explain the available repair options before work begins.
Yard Leak Diagnosis
Identification of underground plumbing leaks that may cause wet soil, pooling water, unusually green patches, or water loss.
Water-Line Leak Repair
Repair of damaged, leaking, or deteriorated water lines after the location and condition of the problem have been determined.
Pressure and Meter Checks
Evaluation of water pressure and meter activity to help determine whether a hidden leak may be present.
Pipe Rerouting
When appropriate, a damaged underground line may be bypassed by routing a new water line through a more accessible location.
Damaged Pipe Replacement
Replacement of sections of pipe that are corroded, cracked, deteriorated, or no longer dependable.
Signs You May Have a Hidden Water Leak
Yard and slab leaks can develop without an obvious burst pipe or visible stream of water. Contact a plumber if you notice one or more of these warning signs:
- An unexplained increase in your water bill
- The water meter moves when no water is being used
- The sound of running water when fixtures are turned off
- Low or suddenly reduced water pressure
- Warm or damp areas on a floor
- Moisture beneath flooring or carpet
- Water pooling near the foundation
- Unusually wet or soft areas in the yard
- One section of grass growing faster or greener than the rest
- Mildew, musty odors, or unexplained indoor moisture
These symptoms do not always confirm a slab or yard leak, but they are good reasons to have the plumbing system inspected before the problem becomes more extensive.
Early Diagnosis Matters
Why a Hidden Water Leak Should Not Be Ignored
Even a relatively small underground leak can waste water every day. Over time, that moisture may affect soil conditions, flooring, cabinets, walls, landscaping, and other nearby materials.
A hidden leak may also become more difficult and expensive to repair if the damaged section of pipe continues to deteriorate.
Lujan Plumbing will evaluate the symptoms, inspect the plumbing system, and recommend a repair based on the actual location and condition of the leak rather than assuming the most invasive option is necessary.
What Is a Slab Leak?
A slab leak is a leak in a water line located beneath or within a home's concrete foundation. Because the pipe is concealed, water may travel beneath the slab or through nearby materials before becoming visible inside the home.
The exact symptoms depend on whether the damaged line carries hot or cold water, where the leak is located, and how long it has been present. Some slab leaks create warm floor areas or indoor moisture, while others are first noticed through increased water usage or pressure loss.
Common Causes of Slab Leaks
Pipe Corrosion
Water chemistry, pipe material, age, and surrounding conditions can contribute to gradual deterioration.
Movement and Settlement
Soil movement or normal building settlement can place stress on pipes and plumbing connections.
Abrasion and Friction
A pipe may rub against concrete, gravel, another pipe, or nearby materials as it expands, contracts, or moves.
High Water Pressure
Excessive pressure can increase stress on pipes, fittings, and already weakened areas of the plumbing system.
Installation Problems
Pipes that were bent, damaged, poorly supported, or improperly connected during installation may fail over time.
Aging Plumbing
Older pipes may become more vulnerable to leaks as their materials and connections deteriorate.
Yard Leak Detection and Repair
Underground water lines can also leak outside the home. A yard leak may occur in the main water service line or another buried plumbing line running across the property.
Depending on its location and severity, a yard leak may create standing water, soft soil, erosion, high water usage, reduced pressure, or vegetation that grows differently from the surrounding area.
- Persistent wet areas during dry weather
- Water pooling near the meter or foundation
- Muddy or soft ground in one section of the yard
- An unexplained rise in water usage
- Reduced pressure throughout the home
- Water sounds near an underground line
- Cracks, erosion, or settling near the wet area
Common Causes of Yard Leaks
Aging Underground Pipes
Buried water lines may weaken, corrode, crack, or separate as they age.
Soil Movement
Expanding, contracting, or shifting soil can put pressure on underground plumbing.
Tree Root Activity
Roots can shift soil or place pressure on nearby pipes and connections as they grow.
Accidental Damage
Digging, landscaping, fencing, construction, or heavy equipment can damage buried plumbing lines.
High Water Pressure
Excessive pressure can contribute to failures in weak or deteriorated underground pipes.
Failed Connections
Fittings, joints, and transitions between different pipe materials may loosen or deteriorate over time.
How We Diagnose Yard and Slab Leaks
Hidden leak diagnosis begins by reviewing the symptoms and determining whether the water loss appears to be inside the home, beneath the slab, in the yard, or somewhere else in the plumbing system.
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1
We Review the Warning Signs
You tell us about high water bills, wet areas, pressure changes, running-water sounds, or other symptoms.
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2
We Check the Plumbing System
We inspect accessible plumbing, meter behavior, pressure, valves, and other relevant parts of the system.
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3
We Narrow Down the Leak
The symptoms and test results help determine the likely location and type of damaged line.
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4
You Receive a Repair Recommendation
We explain the repair options, expected access needs, and the recommended next step before work begins.
Possible Repair Options for Hidden Water Leaks
The correct repair depends on the location of the leak, the pipe material, the condition of the plumbing, accessibility, and whether the damage is isolated or part of a larger pattern.
Direct Pipe Repair
The leaking section is accessed and repaired when the location is known and direct access is practical.
Partial Pipe Replacement
A damaged section of pipe is removed and replaced when a simple fitting repair would not provide a dependable solution.
Pipe Rerouting
A new line may be routed around the failed underground section when that approach reduces disruption or improves access.
Water-Service Line Repair
A leaking yard service line may be exposed and repaired or replaced depending on its material and condition.
Valve or Connection Repair
In some cases, the leak originates from a fitting, valve, or connection rather than the main length of pipe.
Broader Pipe Replacement
More extensive replacement may be recommended when multiple failures or widespread deterioration are present.
Not every leak requires foundation access or extensive excavation. Lujan Plumbing will recommend the repair method that best fits the actual plumbing problem and property conditions.
What to Do if You Suspect a Hidden Leak
- Stop using unnecessary water fixtures and appliances
- Check whether the water meter is moving with all fixtures off
- Move belongings away from visible indoor moisture
- Avoid cutting into flooring or walls before the leak is located
- Do not ignore rapidly spreading water or significant pressure loss
- Call a plumber to inspect the system and identify the source
If water is rapidly entering the home and you know how to safely access the main shutoff valve, turning off the water may help limit damage until service arrives.
Why San Antonio Homeowners Choose Lujan Plumbing
A hidden leak can be stressful because the source and repair cost are not always obvious. You deserve a careful diagnosis and a clear explanation of the available options.
- More than 30 years of plumbing experience: Your plumbing system is evaluated by an experienced Master Plumber.
- Local and family-owned: You receive personal service from a San Antonio plumbing business, not a national franchise.
- Cause-based recommendations: We work to identify the source of the leak before recommending a repair.
- Practical repair options: We explain direct repair, replacement, and rerouting possibilities when they apply.
- Respect for your property: We consider access, disruption, and surrounding materials when planning the repair.
- Clear communication: We explain the problem and recommended solution before completing the work.
Frequently Asked Questions About Yard and Slab Leaks
How can I tell whether I have a hidden water leak?
Common warning signs include an unexplained water-bill increase, meter movement when all fixtures are off, running-water sounds, low pressure, wet flooring, warm floor areas, or consistently soggy ground outside.
What is the difference between a yard leak and a slab leak?
A yard leak occurs in an underground plumbing line outside the home. A slab leak occurs in a water line beneath or within the concrete foundation.
Can a slab leak cause foundation damage?
Moisture from a long-term leak can affect soil and materials around a foundation. The extent of any structural concern depends on the location, severity, duration, soil conditions, and building construction. A foundation professional may be needed when structural damage is suspected.
Does every slab leak require breaking through the floor?
No. The best repair depends on the leak location and plumbing layout. In some situations, rerouting the damaged line may avoid direct access through the slab.
Can a slab leak be repaired in one day?
Some repairs may be completed in a day, while others require additional time because of access, pipe condition, drying, restoration, or the extent of the damaged plumbing.
Why is one area of my floor warm?
A warm floor area may indicate a leaking hot-water line beneath the slab, but other causes are possible. The plumbing system should be inspected before assuming a slab leak is present.
Can a leak cause low water pressure?
Yes. A significant leak may reduce the amount of water reaching fixtures. However, low pressure can also be caused by valves, regulators, restricted pipes, fixture buildup, or supply issues.
Will homeowners insurance cover a slab leak?
Coverage depends on the policy, the cause of the leak, and the type of resulting damage. Some policies may cover certain sudden water damage while excluding the deteriorated pipe itself. Contact your insurance provider for an explanation of your specific coverage.
Can a yard leak come from an irrigation system?
Yes. Wet ground may be caused by a plumbing service line, irrigation piping, sprinkler components, drainage, or another source. The water system should be evaluated to determine which line is responsible.
Do you serve areas outside San Antonio?
Lujan Plumbing serves San Antonio and nearby communities. Contact us to confirm service availability for your address.
Request Plumbing Service
Suspect a Yard or Slab Leak?
Contact Lujan Plumbing for professional yard and slab leak diagnosis and repair in San Antonio. We will inspect the plumbing system, explain what we find, and recommend a practical repair for your property.