Old Unit Removal
We shut off the gas and water, drain the old heater with a drain pump, disconnect the flexible connectors, and haul the unit away. You do not have to move a 150-pound tank or figure out disposal.
Same-day tankless swaps, code-correct work, hot water back fast
Tankless Water Heater Replacement in Carrollton
When your tankless unit quits mid-shower, you need Tankless Water Heater Replacement in Carrollton that happens today, not next week. We install Rinnai, Navien, Rheem and A. O. Smith units across Carroll County, handle the gas and venting, and haul the old heater away. Most swaps are done in three to five hours. Call (943) 469-0029 and we will tell you straight what your replacement needs.
Careful work. Honest options.
About this service
Tankless Water Heater Replacement in Carrollton: What It Involves
Tankless Water Heater Replacement in Carrollton is the removal of a failed or aging tankless unit and the installation of a new one on the same gas, water, and venting connections. We isolate the gas line, drain the unit, cut out the old mounting bracket, and check the venting against NFPA 54 before the new heater goes up. Copper pipe or PEX tubing gets reworked as needed, and we pressure-test every joint before we leave.
Carrollton homes take a beating from hard water and cold snaps. Sediment buildup and scale choke the heat exchanger, and a hard freeze can crack a condensate line overnight. If you are searching for tankless water heater replacement near me because your unit is throwing error codes or giving lukewarm water, we stock the common Rinnai and Navien models so most jobs finish the same day. We also handle emergency tankless water heater replacement Carrollton calls after hours.
- ✓ Endless Hot Water Again
- ✓ Lower Gas Bills
- ✓ No More Leaks or Rust
- ✓ Code-Correct Venting
What's included
What Our Tankless Replacement Includes
Every replacement we do in Carrollton includes the parts and labor to get a new unit running and code-compliant. We list what is covered so you know what you are paying for. If your job needs something beyond this, we tell you before we start, not after.
New Unit Installation
We mount the new tankless heater, connect the gas flex connector, and tie in the water lines with copper pipe or PEX tubing. New brass fittings, Teflon tape, and dielectric unions go on every connection.
Venting and Code Check
We verify vent material, clearances, and termination against NFPA 54 and Uniform Plumbing Code. If the old venting is wrong, we correct it. The T&P valve gets tested and the discharge line is checked.
Gas and Water Testing
We pressure-test every water joint and leak-test the gas connection with a multimeter and soap solution. The burner fires and we watch the outlet temperature climb to 120 degrees before we sign off.
Permit and Disposal
We pull the Carroll County permit and schedule the inspection. The old unit goes on our truck and gets recycled. You get the manufacturer warranty registration and our number for follow-up.
How it works
Our Tankless Replacement Process
We ask for the model, the error code if you have one, and whether you smell gas. That tells us what to load on the truck. If it is a gas leak or a no-hot-water call, we treat it as priority and get a tech moving toward your Carrollton address within the hour.
The tech checks inlet and outlet temperatures with a multimeter, inspects the T&P valve, and looks for scale in the heat exchanger. You get a straight answer: repair or replace. Most units past 10 years old are not worth a $600 repair when a new one is a few hundred more.
We shut off the gas and water, drain the old unit with a water heater drain pump, and disconnect the flexible connectors. The old heater goes on the truck for disposal. We clean the wall, check the vent for corrosion, and confirm the new unit will sit level and clear the code-required 12 inches of space.
The new unit goes up on the bracket. We solder or press the copper pipe, install new brass fittings and Teflon tape on every thread, and reconnect the gas flex connector. Then we purge the line, fire the burner, and watch the temperature climb to 120 degrees before we call it done.
We show you the isolation valves, the filter screen you should rinse twice a year, and the error-code chart inside the panel. You get the manufacturer warranty paperwork and our number. If anything looks off in the first 30 days, we come back at no charge.
STEP 01Phone Triage
We ask for the model, the error code if you have one, and whether you smell gas. That tells us what to load on the truck. If it is a gas leak or a no-hot-water call, we treat it as priority and get a tech moving toward your Carrollton address within the hour.
Tools & methods
Tools and Methods We Use
Pipe wrench and tube cutter
Used to break down old fittings and cut copper pipe cleanly so the new connections seat without burrs or leaks.
Soldering torch and flaring tool
For sweating copper joints and forming flare fittings on gas and water lines. We pressure-test every joint after.
Water heater drain pump
Empties the old tank or tankless unit fast so we are not waiting on gravity and you are not mopping up water.
Multimeter and T&P valve tester
Checks voltage at the heating element, verifies thermostat readings, and confirms the T&P valve opens at the right pressure.
Leak detector and soap solution
Every gas connection gets tested after the flex connector goes on. We do not leave until the joint holds with no bubbles.
Real results
Before and after.
Tankless Water Heater Replacement
Failed Navien Swapped Same Day
A Navien NPE-240A in a Downtown Carrollton home was throwing an E003 error and giving lukewarm water. The heat exchanger was scaled and the inlet filter was clogged. The homeowner had been dealing with it for three weeks.
After: We installed a new Navien unit on the same venting, replaced the inlet filter, and flushed the line. Outlet temperature held at 120 degrees. The job took four hours, and the homeowner had hot water by mid-afternoon.
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Tankless Water Heater Replacement
Tank to Tankless Conversion in Castle Hills
A family of five in Castle Hills had a 50-gallon tank that ran out of hot water every morning. The tank was 11 years old, the gas line was undersized for tankless, and the venting was not set up for a condensing unit.
After: We upsized the gas line, ran new PVC venting, and installed a Rinnai condensing unit rated at 0.95 UEF. The install took seven hours. The family now runs two showers and the dishwasher at once with no temperature drop.
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Tankless Water Heater Replacement
Emergency Freeze Repair on Belt Line
A January freeze cracked the condensate line on a rental unit near Belt Line. The heater shut down overnight, and the tenant woke up to cold water. The landlord called us at 7 a.m.
After: We replaced the cracked condensate line, insulated the new run, and tested the unit. Hot water was back by 10 a.m. We also added freeze protection to the exterior drain so the same failure does not repeat next winter.
Book this service → Problems we solve
Tankless Problems We Fix in Carrollton
Tankless units fail in predictable ways, and Carrollton water makes some of them worse. Here are the calls we get most and what we do about them.
Ask a pro →No hot water or lukewarm showers
We diagnose the cause with a multimeter, check the inlet filter and heat exchanger for scale, and tell you whether a repair or replacement makes sense. If the exchanger is scaled or cracked, we replace the unit and flush the new one before we leave.
Rusty water or a leaking tank
We shut off the water, confirm the tank is compromised, and replace the unit. If the leak is at a fitting or the T&P valve, we may be able to repair it. We tell you straight which one it is.
Popping noises and sediment buildup
We pull the unit, inspect the exchanger, and replace it if the scale is too far gone. On a newer unit, a flush may buy you time. Either way, we install a filter screen and show you how to rinse it twice a year.
Gas smell or pilot outage
We treat gas calls as priority. The tech checks the gas flex connector and all joints with a leak detector, confirms the supply is sized right, and replaces the unit if the control board or gas valve has failed.
Transparent pricing
Tankless Replacement Pricing in Carrollton
$1,800 - $3,500 installed, depending on unit, venting, and gas line work
Typical 2026 pricing for Tankless Water Heater Replacement in Carrollton runs $1,800 to $3,500 installed. The low end covers a like-for-like swap of an indoor 199,000 BTU unit with existing venting and gas capacity. The high end covers condensing models, new PVC venting, gas line upsizing, or an outdoor install. We quote the full number before we start, including the permit and disposal. If the job needs more than expected, we stop and show you before we do the work.
A new tankless unit lasts 10 to 15 years and cuts water-heating gas use 15 to 25 percent. Spread over that lifespan, the install cost is a fraction of what you pay for the convenience and the lower monthly bills.
•affects cost
A standard indoor Rinnai or Navien runs less than a high-capacity condensing unit. Larger homes with more fixtures need a bigger unit, which adds cost but also adds capacity.
Get a quote ↗•affects cost
If the existing venting works with the new unit, you save money. Condensing units need PVC venting, and if it has to be run new, that adds labor and materials.
Get a quote ↗•affects cost
Tankless units draw more gas than tanks. If your existing line is undersized, we upsize it to meet NFPA 54. That is often the single biggest variable in the quote.
Get a quote ↗•affects cost
Switching from a tank to tankless means new venting, gas work, and often a new location. A like-for-like tankless swap is faster and cheaper.
Get a quote ↗ Proof you can check
Licensed, Insured, and Reviewed
- Georgia Plumbing License · Georgia State Construction Industry Licensing Board
- Rheem Manufacturer Certification · Rheem
- A. O. Smith Manufacturer Certification · A. O. Smith
- Navien Manufacturer Certification · Navien
- OSHA Safety Compliance · Occupational Safety and Health Administration
Customer reviews
What Carrollton Customers Say
★★★★★
“Our Navien quit on a Friday night with a house full of guests. Called Saturday morning and they had a new unit on the wall by 2 p.m. The tech showed me the scale in the old heat exchanger and explained why it failed. Price was what they quoted on the phone. Hot water never skipped a beat after that.”
MT
Marcus T.Homeowner, Downtown Carrollton
✓ Verified“
★★★★★
“I manage three rentals near Belt Line and one of the tankless units died mid-lease. They handled the permit, installed a new Rinnai, and sent me the warranty paperwork the same day. Tenant had hot water by evening. I have used them twice since for other properties.”
AR
Angela R.Landlord, Belt Line
✓ Verified★★★★★
“We had rusty water and popping noises for weeks. Turned out the anode rod was gone and the tank was shot. They replaced it with a tankless unit and reworked the gas line, which was undersized. Took most of a day but the inspection passed first try. Gas bill dropped about $18 a month.”
DK
Dale K.Homeowner, Castle Hills
✓ VerifiedMost replacements run $1,800 to $3,500 installed, depending on unit size, venting, and whether we need to rework gas or water lines. A straightforward swap of a 199,000 BTU indoor unit with existing venting lands near the lower end. Outdoor units and condensing models with PVC venting cost more. We give you the full number before we start.
We do. Carrollton Water Heater Replacement Pros installs Rinnai, Navien, Rheem, A. O. Smith, Bradford White, Bosch, and Stiebel Eltron units across Carroll County. Our techs are state-licensed and factory-certified. Call (943) 469-0029 and we will confirm we cover your ZIP, whether that is 30117, 30116, or 30118.
A standard replacement takes three to five hours. That includes removal, disposal, new fittings, gas reconnect, and testing. If we are converting from a tank to tankless, plan on six to eight hours because the gas line often needs upsizing and new venting has to be run. We tell you the window when we book the job.
Yes, if your unit is 10 years or older or you are facing a $600-plus repair. A new condensing unit runs at 0.95 UEF, which cuts water-heating gas use 15 to 25 percent. Add the 10- to 15-year lifespan and the endless hot water, and the math works. We will tell you honestly if a repair makes more sense.
Ready when you are
Need Tankless Water Heater Replacement in Carrollton Today?
We answer the phone 24/7, stock the common Rinnai and Navien units, and give you the price before we start. Licensed, insured, and code-correct on every Carroll County job. Call (943) 469-0029 and we will get your hot water back.
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Request an appointment
Call for Water Heater Help
Reach us at (943) 469-0029 any time, day or night. We answer live, ask a few questions about your tank, and get a plumber headed your way. Regular appointments run Monday through Friday, and emergency calls are covered 24/7 across Carrollton and Carroll County.
Call anytime(943) 469-0029Email the officeinfo@waterheaterreplacementcarrolltonga.xyz
Office hoursOpen 24 hours · 7 days a week