TSBPE-licensed plumbers perform hydrostatic testing without excavation and provide a documented pass or fail report.
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Slab leaks are often hidden. You may notice a warm patch on the floor, a rising water bill, or an inspector flagging moisture during a sale. Herndon McFarland Plumbing has provided hydrostatic testing in the DFW metroplex since 1995 to pinpoint leaks without breaking the concrete and floor.
Book your hydrostatic test with Herndon McFarland Plumbing today.
It is also called hydrostatic pressure testing. This is the core diagnostic. We isolate the drain system at the cleanout, fill it with a static column of water, and watch the level. If it holds, your drains are sound. If it drops, a buried line has failed.
It narrows the leak to one run of pipe when a base test fails. Our static isolation testing turns a pass-or-fail into an exact location.
Buyers and sellers in DFW use our service to settle the leak question before closing. We deliver a clear report for a buyer, a lender, or a title company.
Most slab claims depend on proof that the loss is real. We document the test, the result, and the affected line, and provide adjuster assistance.
When a test fails, we run a sewer camera to confirm the pipe condition and rule out roots, bellies, or corrosion. We pair a visual record with the test data.
After repair, we rerun the hydrostatic test to confirm the system holds, the written verification that the leak is resolved.
The soil under most DFW homes is expansive clay that swells in wet months and shrinks in the long, dry summer. That movement does not stay in the yard. It pushes into the foundation and shifts the slab enough to stress the rigid drain lines within the concrete.
Those drain, waste, and vent lines run by gravity, so they carry no constant pressure. A crack in a buried drain can weep for months without warning. This is why an under-slab leak is easy to miss until a bill spikes or an inspector finds moisture.
A hydrostatic test loads the drain system with a static head of water and measures whether the column holds. This water test method is recognized in the plumbing code published by the International Code Council. A supply-side pressure test cannot answer it because only a standing column of water exposes a slow separation in a gravity drain.
The result matters for the whole system. Insurers and buyers treat a documented pass or fail as the deciding record for whether a slab loss is real and sudden. At Herndon McFarland Plumbing, we test to that standard, isolate the failed run, and provide a report that holds up when a claim or closing depends on it.
Robert Mitchell came to us facing a stressful under-slab water leak. Instead of letting the issue drag on, our team stepped in to handle the situation in full.
Robert shared:
“Location identified, slab broken, pipe repaired, slab hole closed in one day. Professional operation. Guys cleaned up afterward.”
That standard holds on every job. We confirm the actual source before you pay for repairs, ensuring your plumbing issues are fully resolved and your property is treated with the utmost care. Read Robert’s full Google review.
Lauren Ashburn faced what homeowners dread most: confirmed plumbing trouble beneath the slab, requiring a repair large enough to turn a house upside down. What stood out was how it was handled, from the first testing conversation to the final repair.
Lauren noted:
“From the moment we realized we had under-slab plumbing issues to the completion of repairs, Herndon was a pleasure to work with. There was clear communication regarding testing and repairs, the work was done on time, and despite the magnitude of the job, my home was clean and put back together! I would highly recommend Herndon McFarland for your plumbing needs!”
We treat testing as the foundation of the whole job because a clear pass-or-fail result tells you exactly what the repair will involve. Lauren’s experience reflects how we run a large under-slab project. We communicate early, move on schedule, and leave the home as we found it. Read Lauren’s full Google review.
We opened in 1995 and have spent three decades testing and repairing under-slab plumbing across DFW. We are licensed in TX as a Responsible Master Plumber #RMP35786, and have a team with over 100 years of combined experience.
If your floor has a warm spot, your bill keeps climbing, or an inspection flagged a leak, hydrostatic testing gives you a documented answer.
Schedule your hydrostatic test now. We will isolate the result, explain it plainly, and put it in writing.
Pair it with our leak detection and repair and slab leak services if the result points below the foundation, or see our full plumbing services.
Watch for a sudden jump in your water bill, a warm or damp spot on the floor, the sound of running water with every fixture off, or a leak flagged during a home inspection. Each can point to a failed drain line below your slab.
We access a cleanout, seal the drain system with a test ball, and fill the lines to a set static level. A level that holds is a pass; one that falls is a fail. It is often confirmed with a camera inspection.
Yes, because it answers the pass-or-fail question without any excavation. We only open the floor once the test and our static isolation testing have narrowed the failure to a specific run, keeping the repair small.
That depends on what the test and camera reveal. A single break in a sound pipe is usually a targeted repair. For widespread corrosion or multiple bellies, rerouting or a repipe is the better long-term value. We lay out both with upfront pricing.
The expansive clay across the metroplex swells and shrinks with the seasons. It stresses the rigid drain lines under your foundation until they crack at the joints. Routine inspection catches many issues early.
Book your appointment online, and we will arrange same-day service when your situation cannot wait. We confirm pricing in writing before we begin.
From slab leaks under the foundation to sewer line repipes, every job is diagnosed, documented, and done right. A look at recent work across North Dallas.
Excellent customer service, very friendly staff from the person taking the call to the staff fixing the repairs. Very trustworthy company. Shaun explained the step-by-step process and provided very fair prices.
Their positive, upbeat, anxious-to-please attitude made the whole process the very best it could be! All of the employees were a pleasure to work with. I highly recommend Herndon McFarland.
Trent and Reggie were the most professional associates entering our home. They treated our home with respect as if it were theirs. We will use this company again because of them and our experience.
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One-time use. Cannot be combined with any other coupon or offer. MENTION AT SCHEDULINGSave on any water slab leak repair or full reroute under your foundation.
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Cannot be combined with any other offer or coupon. MENTION AT SCHEDULINGSave on any plumbing service call or faucet replacement.
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