- BBB A+ Rated
- Mesquite Chamber of Commerce Member
- 30+ Years Experience
Tankless Water Heater Repair in Richardson
James Armstrong Plumbing services, repairs, and installs tankless water heaters in Richardson, TX. Master Plumber James Armstrong, Texas License M-39428 with a gas endorsement, personally oversees every job. Founded 1995. BBB A+ accredited since 2018 and a Mesquite Chamber of Commerce member.
Richardson homes are not all alike. CityLine condos have tight closets. Attic units in Canyon Creek face summer heat. Older homes near Prairie Creek Park may have long vent paths. We record pressures, delta-T, draft, and flow, show you photos of anything hidden, and walk you through options that fit your layout and budget.
Call James Armstrong Plumbing at 214-918-6109 for tankless water heater service in Richardson, TX.
Same-Day Service — Call Before Noon • Most calls are answered within 15 minutes
Licensed Master Plumber
License #M39428
The “Armstrong Clean Promise".
We leave your home cleaner than we found it, or we pay for the cleaning. 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
Proudly partnered with leading brands
Meet James Armstrong
Meet the Master Plumber Serving DFW: 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 Mesquite, 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.
Why Choose Us
Why Richardson 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.
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.
Start with layout and routine. We measure peak simultaneous flow, verify gas capacity at working pressure, and check vent path and termination, then match models that actually fit your home. You see the tradeoffs in plain language along with installation steps and timing before anything is ordered.
Yes, when it is sized and supplied correctly. We calculate simultaneous demand and account for winter inlet temperature, which is the number most sizing guides ignore. For long runs we design recirculation so delivery is not slow at the far fixture. We confirm capacity with you before ordering.
Diagnostics first. Gas pressure, temperature rise, error history, and combustion checks come before anything gets replaced. Then we clean or replace screens, sensors, or igniters and verify the result with live flow tests. You get photos, recorded settings, and a plan for the next interval.
Water hardness and usage set the schedule. Many homes do well on an annual descaling, and high-use or hard-water homes need it sooner. We set the interval from your actual readings rather than a generic calendar. After service, output holds steadier and nuisance codes drop off.
Calls received before noon Monday through Friday are typically scheduled the same day. After-hours, weekend, and holiday calls are accepted for a flat $199 dispatch fee. Our trucks carry common parts, so many failures are resolved on the first visit. If you smell gas, leave the house, call 911, then call Atmos Energy at 866-322-8667 before calling us.