Carrollton Foundation Experts connects homeowners who need under-slab plumbing leak testing in Carrollton, TX with an independent local foundation company that can test or coordinate testing before a repair.
In older slab houses, the drain lines buried under the concrete have been in the ground for decades. A leak in one of them can soak the clay beneath part of the house, making it swell and lift. That is why many foundation repairs in Carrollton start with a plumbing test.
Signs of an Under-Slab Leak
- Water bills rising with no change in use
- Running water sounds with all fixtures off
- Warm floor spots from a hot water line leak
- Damp flooring, cracked tile or musty smells in one room
- One area of the slab rising while others settle
How Testing Works
- Hydrostatic test: a plumber blocks the drain system, fills it with water and watches the level. A drop indicates a leak.
- Pressure test: water supply lines are pressurized and watched for a loss of pressure.
- Camera inspection: if a drain test fails, a camera helps locate the leak.
Plumbing work in Texas is generally done by licensed plumbers, who are licensed by the Texas State Board of Plumbing Examiners.
Why Test Before and After Repair
- Before: a slab lifted by a leak needs the leak fixed first, and the repair plan may change.
- After: lifting can stress old pipes; a second test catches damage.
Older Drain Lines
Older homes may have original drain lines that have corroded, cracked or been disturbed by tree roots. If yours is an older Carrollton house, ask about a camera inspection of the main drain along with the test.
Testing Older Carrollton Homes
Houses built during Carrollton's suburban boom are now old enough that their original under-slab drains have seen decades of soil movement. A camera inspection of the main drain, along with a hydrostatic test, gives a clear picture before any lifting. If a leak is found, fixing it first and then letting the soil stabilize can change how much lifting the house needs.
Who Tests and What You Get
Leak testing is plumbing work, and plumbers in Texas are licensed by the Texas State Board of Plumbing Examiners. Whether the foundation company has a plumber on staff or sends you to one, ask for a written report that lists each line tested, the method used and whether it held. A test that only says "passed" without listing the lines is hard to use later.
Repairing a Line That Fails
If a drain or supply line fails, the plumber has to reach it. The usual options are cutting through the floor inside, tunneling under the slab from the yard, or abandoning the line and rerouting it. Each affects floors, landscaping and price differently. Get the plumber's recommendation and estimate in writing, and coordinate the timing with any foundation work so the lift and the plumbing repair do not undo each other.
Common questions
Is a plumbing test required before foundation repair?
Not always, but it is often recommended, especially in older homes or where part of the slab is rising.
Who performs the test?
Usually a licensed plumber. Ask whether the foundation company arranges it.
How long does a hydrostatic test take?
Often a few hours.
Who pays if a pipe breaks during leveling?
It depends on the contract. Ask before you sign.
Can roots get into drain lines?
Yes, especially in older lines with cracks or loose joints. A camera inspection can show it.
Should leaks be fixed before leveling?
Usually. Fixing the leak first and letting the soil settle can change how much lifting is needed.