When your Rinnai quits, you want hot water back fast. We handle Rinnai Water Heater Replacement in Carrollton for tankless units that flash error codes, leak at the manifold, or simply age out past 15 years. Our techs carry Rinnai-specific parts, flush the lines, and pressure-test every connection before we leave. If you need Rinnai water heater installation in Carrollton, Georgia, we can usually be on-site within hours, not days.
Rinnai Water Heater Replacement in Carrollton is the removal of a failed or failing tankless unit and the installation of a new Rinnai condensing or non-condensing heater on the same gas and water lines. We shut off gas at the valve, drain the unit through a water heater drain pump, cut out the old isolation valves with a tube cutter, and inspect the venting for corrosion. Then we set the new heater, rebuild the connections with copper pipe or PEX tubing and brass fittings, and purge air from the line before firing it up.
Most Carrollton homes running a Rinnai are doing so because the original builder installed one for endless hot water. When that unit fails, you get cold showers, error code 11 or 12 on the display, and sometimes a puddle under the manifold. If you are searching for Rinnai water heater replacement near me, we cover every ZIP in Carroll County, from 30117 to 30116. We also handle the cost to replace Rinnai water heater in Carrollton GA questions upfront, so you know the number before we start.
Every Rinnai replacement we do in Carrollton comes with the same core scope. You get the unit, the labor, the code check, and the cleanup. Anything beyond that, like new gas line runs or a relocation, we quote separately before we start.
We supply the new Rinnai tankless heater, isolation valves, dielectric unions, and a fresh gas flex connector. We size the unit to your household, not to whatever is on sale. You get the model number and specs before we install.
We drain and disconnect the old unit, haul it off your property, and dispose of it properly. No dump fees, no old tank sitting in your garage. Most removals take under an hour.
We inspect the existing venting for corrosion and clearance issues. If it fails NFPA 54 or Uniform Plumbing Code, we replace it. You get a safe, code-compliant exhaust path before we fire the unit.
We test gas pressure at the inlet, purge the line, and leak-test every connection with soap solution. If the pressure is off, we adjust the regulator. No gas smell, no guesswork.
We register your Rinnai manufacturer warranty on the spot and hand you the paperwork. Our workmanship warranty covers the install for 2 years. If anything goes wrong, you call us directly.
We show you the thermostat, the error code panel, and the annual flush schedule. You get a written maintenance checklist. Most walkthroughs take 10 to 15 minutes and answer every question you have.
We ask for the error code, the unit model, and how old it is. Most Rinnai failures show code 11, 12, or 16, which tells us whether it is a board, a fan motor, or a heat exchanger. That five-minute call saves you a diagnostic fee and tells us which parts to load.
A licensed tech arrives within your window, usually 2 to 4 hours. We test gas pressure with a multimeter and manometer, check the venting, and confirm the water lines are not corroded. You get a written price before we touch a wrench.
We isolate the gas, drain the old unit, and disconnect the water lines. The old Rinnai comes off the wall and goes into our truck for proper disposal. Most removals take 45 to 60 minutes, and we protect your floor with drop cloths the whole time.
We hang the new Rinnai, rebuild the connections with copper pipe or PEX, install fresh dielectric unions and an expansion tank if needed, and seal the venting to code. This stage runs 2 to 3 hours for a standard indoor swap.
We purge the gas line, fire the unit, and run hot water at every fixture for 10 minutes. You get a walkthrough of the thermostat, the error code panel, and the maintenance schedule. Final step: we register your Rinnai warranty on the spot.
We ask for the error code, the unit model, and how old it is. Most Rinnai failures show code 11, 12, or 16, which tells us whether it is a board, a fan motor, or a heat exchanger. That five-minute call saves you a diagnostic fee and tells us which parts to load.
Used to cut out old copper pipe and sweat new connections cleanly. A clean cut prevents leaks at the fitting and keeps the install code-compliant.
Used to flare copper and brass fittings for gas and water connections. A proper flare seats without tape or dope and holds pressure for the life of the unit.
Used to drain the old Rinnai quickly and flush the new unit during descaling. It moves 10 to 15 gallons per minute, which cuts removal time in half.
The multimeter checks voltage at the board and the flow sensor. The T&P valve tester confirms the relief valve opens at the correct pressure, usually 150 PSI.
The pipe wrench handles the gas and water connections. Dielectric unions prevent galvanic corrosion where copper meets the unit's steel ports.
The expansion tank absorbs thermal expansion and protects the system. Flexible connectors let us set the unit without stressing the hard piping.
A homeowner near Downtown Carrollton had a 16-year-old Rinnai throwing code 12 and leaking at the manifold. The unit had never been descaled, and the heat exchanger was cracked. They had been without reliable hot water for four days.
After: We removed the old unit, flushed the lines, and installed a new 9.5 GPM Rinnai condensing heater. The job took 5 hours. Hot water was back the same evening, and the new unit runs at 0.95 UEF instead of the old 0.62.
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A family of five in Castle Hills could not run two showers at once without losing temperature. Their Rinnai was rated at 6.5 GPM, which was undersized for the household. The gas line was also too small for a larger unit.
After: We upgraded the gas line to three-quarter inch and installed a 9.8 GPM Rinnai condensing unit. The install took 7 hours including the gas work. The family now runs two showers and the dishwasher simultaneously with no temperature drop.
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A landlord in Hebron got a Sunday call that a tenant had no hot water. The Rinnai had a failed PC board and a corroded heat exchanger. The unit was 14 years old and past economic repair.
After: We dispatched on the emergency line and had a replacement Rinnai installed by 9 p.m. The tenant had hot water that night. We documented the install with photos and sent warranty paperwork to the landlord by Monday morning.
Book this service →Rinnai tankless units fail in predictable ways. Knowing the symptom tells us whether you need a repair or a full replacement. Here are the four calls we get most often in Carrollton.
Ask a pro →We diagnose the ignition sequence on-site, test the gas pressure, and check the igniter and flame rod. If the heat exchanger is scaled or cracked, we replace the unit. Most code 11 and 12 calls are resolved the same day.
We shut off the water, pull the unit, and inspect the manifold and isolation valves. If the leak is at a fitting, we rebuild it with new brass fittings and Teflon tape. If the manifold itself is cracked, we replace the heater.
We flush the unit with a water heater drain pump and descaling solution, then inspect the heat exchanger. If the corrosion is advanced, we replace the Rinnai. We also install a sediment filter on the cold inlet to prevent repeat buildup.
We test the power, the gas supply, and the flow sensor. If the unit is repairable, we fix it. If not, we carry replacement Rinnai units on the truck and can install the same day. You get a written price before we start.
$1,800 - $3,400 installed
Typical 2026 pricing for a Rinnai replacement in Carrollton runs $1,800 to $3,400 installed. That range covers the unit, labor, removal, disposal, and warranty registration. A standard indoor swap with existing venting sits near the low end. Costs rise if you need new gas line, new venting, a relocation, or a larger unit. We quote the exact price before we start, and we do not charge a trip fee for the estimate. If you are comparing Rinnai water heater replacement and installation Carrollton GA quotes, ask whether the price includes disposal and warranty registration. Ours does.
A new Rinnai lasts 15 to 20 years and cuts water heating costs by 30 to 40 percent compared to an old tankless unit. Spread over its life, the replacement pays for itself in lower gas bills and fewer emergency calls.
A 7.5 GPM Rinnai costs less than a 11 GPM condensing unit. The right size depends on your fixture count and household size. We size it correctly so you do not pay for capacity you will never use.
Get a quote ↗If your existing gas line is half-inch and the new Rinnai needs three-quarter inch, we have to run new pipe. That adds $300 to $700 depending on the run length and whether we need a permit.
Get a quote ↗Reusing existing venting keeps costs down. If the vent is corroded, undersized, or too close to a window, we replace it. New venting runs $250 to $600 depending on the length and material.
Get a quote ↗Moving the Rinnai to a new wall means new gas, water, and venting lines. That is a bigger job and adds $500 to $1,200. We only recommend relocation when the current spot fails code.
Get a quote ↗“Our Rinnai started throwing code 12 and we had cold showers for two days. These guys came out the same afternoon, confirmed the heat exchanger was done, and had a new unit on the wall by 6 p.m. Price was exactly what they quoted on the phone. They even registered the warranty for us. Solid work.”
Marcus T.Homeowner, Downtown Carrollton
✓ Verified“I called three plumbers and only this one knew what a Rinnai manifold was without looking it up. They replaced our 14-year-old unit, ran new venting, and cleaned up everything. The tech walked me through the thermostat settings and the flush schedule. Hot water has been perfect since.”
Dana R.Homeowner, Castle Hills
✓ Verified“I manage four rentals in Carrollton and one of the Rinnai units died on a Sunday. They treated it as an emergency, got a tech out in under three hours, and had the tenant back in hot water that night. They sent photos and the warranty paperwork the next morning. That is how you keep tenants happy.”
Priya S.Landlord, Hebron
✓ VerifiedMost Rinnai replacements in Carrollton run $1,800 to $3,400 installed in 2026, including the unit, labor, and disposal. A standard indoor swap with existing venting sits near the low end. Costs rise if you need new venting, a larger unit, or a relocation. We give you the exact number before we start, and we do not charge a trip fee for the estimate.
We do. Our techs hold Georgia Plumbing License credentials and manufacturer certification on Rinnai tankless platforms. We cover all of Carroll County, including ZIP codes 30117, 30116, and 30118. If you want a licensed, insured installer who carries Rinnai parts on the truck, call (943) 469-0029 and we will get you on the schedule.
A standard Rinnai tankless swap takes 3 to 5 hours from arrival to hot water. That includes removal, new connections, venting check, and testing. If we need to run new gas line or relocate the unit, plan on a full day. We give you a time window when you book and call 30 minutes before we arrive.
Yes. We run 24/7 dispatch for no-hot-water calls across Carrollton and Carroll County. Most emergency calls get a tech on-site within 4 hours. If your Rinnai is leaking or throwing a gas code, shut off the gas valve and call us immediately. We prioritize leaks and gas issues over routine swaps.
No hot water is not something to sleep on. Call (943) 469-0029 and we will dispatch a licensed tech, usually within hours. We stock Rinnai units on the truck, quote the price upfront, and register your warranty before we leave. Same-day and 24/7 emergency service available across Carrollton and Carroll County.
Book My Replacement (943) 469-0029 →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.