- BBB A+ Rated
- Mesquite Chamber of Commerce Member
- 30+ Years Experience
Slab Leak Repair in Forney, TX
A rising water bill, a warm spot on the floor, or the sound of running water when everything is off are the usual first signs of a slab leak. James Armstrong Plumbing has diagnosed and repaired slab leaks across east Dallas-Fort Worth since 1995. Master Plumber James Armstrong, Texas License M-39428, oversees every job.
Forney sits about 13 minutes from our Mesquite shop, close enough that we treat it like home turf rather than a stretch call.
Licensed Master Plumber
License #M39428
The “Armstrong Clean Promise"
No mess, no stress — that's our guarantee.
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Our Services
Comprehensive Plumbing Solutions for Homes & Businesses
Most Requested 
Plumbing Repairs and Installation
Get fast help from a trusted plumber in the DFW for leaks, fixture installs, and upgrades. We restore your plumbing with smooth, reliable work.
Water Heater Services
From quick fixes to full replacements, our water heater services in Dallas-Fort Worth, keep your hot water steady. We work on all standard and tankless models.
Most Requested 
Drain Cleaning Services
Stubborn clogs disappear with our drain-cleaning solutions in Texas. We clear the buildup fully so your drains flow the way they should.
Sewer Line Plumbing
Our team handles sewer line plumbing in the DFW , with careful inspection and precise repairs. We keep wastewater moving safely away from your home.
Gas Line Plumbing
Safe and reliable gas line plumbing in the DFW, is just a call away. Whether it’s a leak, repair, or new line, we follow strict safety standards.
Emergency Service
Emergency Service — Available 24/7
Burst pipe? Major leak? Don’t wait. Our emergency team serves the entire DFW area around the clock.
Technician available now
Why Choose Us
Why DFW Homeowners Choose James Armstrong Plumbing
Licensed & Certified Technicians
Our plumbers are fully licensed, professionally trained, and committed to delivering quality workmanship that meets today’s industry standards.
Transparent, Upfront Pricing
No hidden fees and no surprises. Just clear, honest pricing you can trust before we begin any repair or installation.
Fast & Friendly Service
We respect your time. Our technicians arrive promptly, work efficiently, and treat you and your home with courtesy and care.
The Armstrong Clean Promise
Floor protection, shoe covers, and a meticulous cleanup on every job. If your home isn’t cleaner than we found it, we pay for the cleaning.
5-Star Rated by Homeowners Like You
Local families choose us for reliable plumbing and friendly service. Your comfort, safety, and satisfaction are the reasons we do what we do.
Emergency Response Available
Afterhours and weekend emergency calls accepted. $199 emergency service fee — no surprises. Call (214) 918-6109.
Why Forney Sees a Particular Kind of Slab Leak
Forney is one of the fastest-growing cities in the DFW metroplex, and most of that growth happened in the last twenty years. Subdivisions like Devonshire, Gateway Parks, Windmill Farms, Heartland, Travis Ranch, and Clements Ranch went up during a stretch when the city’s population grew by well over 100 percent in a single decade. That pace of building is good for buyers and hard on plumbing quality control. Under-slab lines installed during a high-volume building boom are more likely to have a nick, a poor joint, or an install shortcut than lines put in at a slower pace.
The standard North Texas culprit is still in play too. Forney sits on the same expansive clay that runs through most of the DFW area, and that clay swells when it rains and shrinks when it dries. Combined with newer construction that has not yet settled into a stable pattern, that movement can stress a pipe joint that was borderline to begin with.
The older homes near Forney’s historic downtown core are a different story. Those lines are decades older, and age-related corrosion or a shifted joint is the more likely cause there rather than a construction-era defect.
Either way, we do not cut into a slab based on a guess. We camera-inspect and pressure-test first to confirm where the leak actually is before recommending a repair path.
Signs of a Slab Leak
- A water bill that jumps with no change in usage
- A warm or damp spot on the floor, even in rooms without plumbing fixtures
- The sound of running water when every tap in the house is off
- Low water pressure with no other explanation
- Mold, mildew smell, or warped flooring near an exterior wall
Any one of these on its own can point to something else. Two or more together usually means it is time for a camera and pressure test, not more guessing.
How We Diagnose a Slab Leak
You call 214-918-6109
Describe what you are seeing: water bill, wet spot, sound, pressure.
We ask about the home
Age, subdivision if known, and whether this is a new-construction home or an older one near town.
A licensed plumber runs pressure and camera diagnostics on-site
To locate the leak before anyone talks about cutting concrete.
You get a written, flat-rate quote for the repair path
Once the leak location is confirmed. Spot repair, reroute, or full-line replacement, whichever the diagnostics actually support.
We complete the repair and pressure test again
To confirm it holds before we consider the job done.
We follow up within 24 hours
To confirm everything is still holding steady.
Meet James Armstrong
Meet the Master Plumber Serving Rowlett: James Armstrong
James Armstrong has been a Mesquite-resident Master Plumber since 1995. What began as helping neighbors fix leaky faucets turned into a career — and eventually a family business, built on one simple rule: treat people right, do the job with integrity, and always stand behind your work. Today, James and his crew serve Rowlett, Sachse, Garland, and the broader east DFW metro, with most calls dispatched and on-site within 25 minutes of the Mesquite headquarters at 844 Dalworth Dr.
“In thirty years working Rowlett, Garland, and the Lake Ray Hubbard side of the metro, the drain calls almost always come down to two things: tree roots in the older Rowlett neighborhoods near the lake, and grease and hair buildup in the newer developments off Liberty Grove and Schrade Road. We camera-inspect first, then choose hydro-jetting or snaking based on what we actually see — not on what gets you to the highest invoice.”
James Armstrong, Master Plumber • Texas License M-39428 • Founder, James Armstrong Plumbing
Every job comes with the Armstrong Clean Promise — we leave your home cleaner than we found it, guaranteed. No excuses, no mess, no shortcuts. It’s the kind of commitment that’s earned us thousands of repeat customers and a reputation across the DFW metroplex for honest, reliable work.
Emergency Calls Accepted After Hours & Weekends as well.
Our Process
What to Expect When You Call
Call or Book Online
Speak with a real person, not a call center. We schedule at your convenience.
Same-Day Inspection
A licensed plumber evaluates your issue on-site. No guesswork.
Upfront Quote
You approve the price before work begins. The number you see is final.
Clean, Expert Work
Armstrong Clean Promise — we leave your home better than we found it.
Follow-Up Guarantee
We check in within 24 hours and follow up to ensure everything holds.
Free estimate · No obligation · Real person answers
Service Areas
Serving Communities Across Dallas-Fort Worth
- Allen
- Anna
- Arlington
- Azle
- Balch Springs
- Bedford
- Benbrook
- Blue Mound
- Blue Ridge
- Burleson
- Celina
- Colleyville
- Combine
- Dallas
- Everman
- Fairview
- Farmersville
- Flower Mound
- Forest Hill
- Fort Worth
- Frisco
- Garland
- Grand Prairie
- Plano
- Richardson
- Rowlett
- Sunnyvale
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FAQ
Frequently Asked Questions
Have questions? We’ve got answers. Can’t find what you’re looking for? Give us a call anytime.
The most common signs are a water bill that jumps without a change in usage, a warm or damp spot on the floor, the sound of running water when everything is off, and unexplained low pressure. One sign alone could be something else. Two or more together are worth a diagnostic visit.
No. We locate the leak with camera inspection and pressure testing first. Cutting happens only after we know exactly where the problem is, not as a search method.
Forney grew fast, with most of its subdivisions built in the last two decades during a period of rapid, high-volume construction. Under-slab plumbing installed at that pace has a higher chance of a weak joint or install shortcut than plumbing put in more slowly. New construction is not automatically leak-proof.
A spot repair fixes the leak at its exact location under the slab. A reroute runs a new line above the slab or through an accessible path instead, avoiding the damaged section entirely. Which one makes sense depends on where the leak is and the condition of the rest of the line, and we recommend a path only after diagnostics confirm what is actually happening.
Our shop is in Mesquite, about 13 minutes from Forney. Same-day service is available for calls before noon on weekdays.
James Armstrong holds Texas Master Plumber License M-39428. James Armstrong Plumbing is BBB A+ accredited since 2018.