Frisco Foundation Repair Co. connects homeowners who need under-slab plumbing leak testing in Frisco, TX with an independent local foundation company that can test or coordinate testing before a repair.
Drain and supply lines run through the soil beneath a slab house. A slow leak there can soak the clay for months before anyone notices, and soaked clay swells and lifts part of the slab. That makes plumbing tests a standard part of many foundation repairs.
Signs of a Leak Under the Slab
- Water bills climbing with no change in use
- Running water sounds when nothing is on
- Warm areas on the floor, which can mean a hot water line leak
- Damp flooring, cracked tile or musty odors in one area
- One section of the slab rising instead of sinking
The Tests
- Hydrostatic test: a plumber plugs the drain system, fills it with water and watches whether the level drops. A drop means a drain leak somewhere.
- Pressure test: supply lines are pressurized and monitored for loss of pressure.
- Camera inspection: if a drain test fails, a camera run through the line can help locate the problem.
Plumbing testing and repair is generally performed by a licensed plumber, and Texas licenses plumbers through the Texas State Board of Plumbing Examiners.
Why Test Before and After Repair
- Before: a slab heaving from a leak needs the water fixed first; the repair plan may change.
- After: lifting a slab can stress pipes. A follow-up test catches damage early.
Newer Homes Too
A newer house can still have a leak from a fitting, a damaged line or work done during construction. If one area of a newer house is heaving, a test is a cheap way to rule water in or out.
Plumbing in Newer Frisco Homes
Newer houses commonly use plastic drain lines and PEX or similar supply lines, which do not corrode the way older metal pipes can. Leaks still happen at fittings, at joints disturbed during construction and where lines were damaged by later work such as landscaping or remodeling. In older Frisco homes, original drain lines are worth a camera inspection along with the test. Either way, a test that comes back clean is useful: it tells the foundation contractor that water under the slab is not the cause.
When a Line Fails the Test
A failed test means the plumber still has to find and repair the leak. Under a slab, that usually means one of three approaches: breaking through the floor inside the house, tunneling under the slab from outside, or abandoning the old line and running a new one by another route. Each has different costs and different effects on flooring and landscaping. Ask the plumber which they recommend and why, and get a written estimate before work starts.
Common questions
Do I need a plumbing test if my house is new?
If the slab is moving in one area, especially rising, a test helps rule out a leak regardless of the house's age.
Who does the test?
Usually a licensed plumber. Ask whether the foundation company coordinates it or expects you to schedule it.
How long does a hydrostatic test take?
Often a few hours, depending on the house and the plumbing layout.
Who pays if a pipe breaks during leveling?
That depends on the contract. Ask before you sign.
Can a leak make my foundation rise?
Yes. Water swells clay soil, which can push part of a slab upward.
Can a test damage my plumbing?
A properly done test should not. Old, weak lines can sometimes fail under test conditions, which reveals a problem that already existed.