Tankless Water Heater Replacement in Roswell, GA
For efficient tankless water heater replacement in Roswell, GA, trust HGR Plumbing. We ensure your home has consistent hot water.
- Licensed Gas Line Technicians
- Quick Tankless Installation
- Expert Plumbers
- Isolation Valves Installed Standard
Need a Tankless Water Heater Replacement in Roswell, GA?
Tell us your current unit model and we will quote a matching replacement over the phone.
Reliable Tankless Water Heater Replacement for Roswell, GA Homes
HGR Plumbing specializes in professional tankless water heater replacement across Roswell, GA. If your current tankless unit is past its prime, frequently breaking down, or simply not meeting your hot water demands, it may be time for an upgrade. We handle all aspects of removing your old unit and installing a brand new, energy-efficient model.
Our expertise includes:
- Safe gas and electric line connections for new units.
- Correct sizing and model selection for your home.
- Careful removal and disposal of old water heaters.

Additional Plumbing Replacement Services in Roswell, GA
When repairs are no longer enough, our replacement services in Roswell, GA deliver durable upgrades that restore full performance.

Customers
Why Choose HGR Plumbing for Tankless Water Heater Replacement in Roswell, GA?
We understand the plumbing challenges homes face in Georgia and are equipped to handle any complexities involved in swapping your old tankless unit for a new, reliable one.
- Endless Hot Water, Stop running out of hot water, even during peak demand, a true luxury for busy Roswell households with multiple showers or large families.
- Energy Savings, Tankless water heaters only heat water when you need it, which can significantly reduce energy use compared to traditional tank models, a big plus for Georgia utility bills.
- Increased Lifespan, Modern tankless water heaters often last twice as long as conventional tank models, offering a better long-term investment.
Citywide Coverage
We replace tankless water heaters in every neighborhood of Roswell, from newer builds with garage-mounted units to older homes converting from a tank. Our trucks carry venting kits and gas fittings for both indoor and outdoor installs.
Experienced Team
Our team of licensed plumbers has extensive experience with all major tankless water heater brands and models. They complete ongoing training to stay current on installation techniques and safety protocols for this specialized equipment.
Safety-First Approach
We take extra care with gas and water line connections, ventilation and pressure relief systems. You get a replacement that not only works perfectly but also meets the highest safety standards.
Trusted Certified Roswell Plumbing Services Professionals
At HGR Plumbing, we take pride in providing certified plumbing services throughout Roswell, GA. Backed by leading industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver lasting results you can trust.
Call Us Now
PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationExpert Tankless Water Heater Replacement Services in Roswell, GA
Emergency Tankless Water Heater Replacement in Roswell
A sudden tankless water heater failure can leave your Roswell home without hot water, which is a major inconvenience. HGR Plumbing offers emergency tankless water heater replacement to restore your hot water fast. We put a priority on urgent situations, working to diagnose the issue and, if replacement is necessary, get a new unit installed as soon as possible. Our goal is to minimize your downtime and get your home back to normal with reliable hot water.

Like-for-Like Tankless Swaps in Roswell
When your existing tankless has a cracked heat exchanger or a failed control board that is not worth repairing, a direct replacement is often the fastest fix. We match the new unit to your current gas line, venting type and mounting location whenever possible. Many Rinnai and Navien models share similar footprints, which keeps wall patching to a minimum. We also replace the old service valves if they are corroded or stuck. Most like-for-like swaps are finished in four to six hours.
Electric Tankless Water Heater Replacement in Roswell, GA
For properties without natural gas access or those looking for an all-electric solution, electric tankless water heaters are a practical choice. HGR Plumbing offers electric tankless water heater replacement services in Roswell, GA. This often involves careful assessment of your home's electrical panel capacity, as these units require significant amperage. We make sure your new electric tankless unit is installed safely and correctly, providing on-demand hot water without the need for gas lines.
Gas Tankless Water Heater Replacement in Roswell
Many homes in Roswell rely on natural gas for water heating, and gas tankless units are a very efficient option. Our gas tankless water heater replacement service includes thorough inspection of your existing gas lines, proper sizing of new gas lines if needed, and secure venting to the outdoors. We put a priority on safety. All gas connections and combustion air requirements meet Georgia and local codes, heading off potential hazards and maximizing efficiency.
Navien Tankless Water Heater Replacement in Roswell, GA
Navien tankless water heaters are popular for their condensing technology, offering high efficiency and performance. When it is time for a Navien tankless water heater replacement in Roswell, GA, you can count on HGR Plumbing. We have broad experience with Navien's advanced systems, including their combination boiler and water heater units. Our installation process focuses on dialing in your new Navien's performance, so you benefit from its energy-saving features and reliable hot water output.
Condensing Tankless Replacement in Roswell
Condensing tankless units like the Navien NPE series or Rinnai Sensei reach efficiencies above 90 percent by recovering heat from exhaust gases. They vent through low-cost PVC and produce acidic condensate that must be neutralized and drained properly. We install a neutralizer cartridge and route the condensate line to an approved drain. Long, steamy summers and heavy humidity are the main stress on plumbing in Georgia, driving condensation, mold in crawlspaces, and hard-working water heaters. Condensing units still save gas because they work year-round on showers, laundry and dishes. We explain the cost difference so you can decide if the efficiency gain is worth the price.
Commercial Tankless Replacement in Roswell
Restaurants, salons and small offices often use multiple tankless units linked together on a rack system. When one or more units fail, we replace them and rebalance the cascade controls so they share the load. We check gas pressure under full demand, since commercial racks can draw more than 600,000 BTU combined. Scheduling is easy to work around, so we can work after hours and keep your business open. We also set up a descaling schedule suited to your water usage.

Tank to Tankless Conversions in Roswell, GA
Converting from a 40 or 50 gallon tank to tankless frees up floor space and ends standby heat loss in a garage or closet. The catch is that tankless units often need a larger gas line, often three quarter inch or bigger, plus new venting. We check your meter size and pipe run before quoting so there are no surprises mid-job. We also cap or reroute the old flue and seal the roof penetration if it is no longer used. Expect a conversion to take a full day.
Tankless Water Heater Replacement Near Me in Roswell, GA
If you are searching for tankless water heater replacement near me, you want a local plumber who understands Georgia water and gas codes. HGR Plumbing serves Roswell with trucks stocked for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
If you are searching for tankless water heater replacement near me in Roswell, GA, HGR Plumbing is your local expert. Our service area covers the whole region, so a professional plumber is always close by when you need a new, efficient hot water solution. We are known for quick response times and reliable service for all tankless installations.
HGR Plumbing at a Glance
- Licensed and insured plumbers serving Roswell, GA
- Same-day appointments and 24/7 emergency response
- Clear written estimates, no hidden fees
- 4.9-star rated by 357+ Georgia customers
Roswell Map
Roswell Information
- Population
- 91,706
- Area codes
- 770/470/678
- Service area
- Roswell and communities within 40 miles
- Nearby
- Alpharetta, Dunwoody, Sandy Springs, Johns Creek
Private wells still serve a sizable share of rural Georgia homes, and iron, sediment, and low pH can shorten the life of pumps, tanks, and copper lines. Scale builds inside tankless heat exchangers over time, so a properly sized replacement with flush valves protects homes in Roswell, GA from early failures.
Expert Services
Trust our professionals for reliable HGR Plumbing solutions in Roswell, GA.
Our Specialized Plumbing Services in Roswell, GA
At HGR Plumbing, we provide a complete range of plumbing services across Roswell, GA. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Tankless Water Heater Replacement Process Works in Roswell, GA
We make sure every step, from initial consultation to final installation, is handled with professionalism and care.
Request a Quote
Call (770) 470-3778 with your current model number and a photo of the install. We give you a ballpark price and schedule a visit.
Size and Inspect
Our tech measures gas line size, meter capacity, venting path and water hardness. We recommend a unit that matches your hot water demand.
Install and Test
We remove the old heater, install the new one with service valves and venting, then test gas pressure and combustion. You get a walkthrough on settings and annual flushing.
Frequently Asked Questions About Tankless Water Heater Replacement in Roswell
A like-for-like gas tankless replacement typically runs $2,800 to $4,500 installed, depending on the brand and venting. Converting from a tank to tankless often costs $4,000 to $6,500 because of gas line and venting upgrades. We give you a written quote before any work starts.
Frequent error codes, fluctuating temperature, water leaking from inside the cabinet and a unit older than 15 years are common signs. If the heat exchanger is leaking, replacement is usually the better value.
A standard tankless water heater replacement, if you are upgrading from an existing tankless unit, usually takes 4 to 8 hours. If you are converting from a traditional tank water heater, the process can take longer, possibly a full day, due to additional plumbing, gas or electrical changes required for proper installation and venting.
Yes. Softened or scale-treated water greatly reduces mineral buildup in the heat exchanger. We can install a scale-reduction filter if a full softener is not in your plans.
New tankless water heaters typically come with a manufacturer's warranty on the heat exchanger, usually 10 to 15 years, and on parts, usually 3 to 5 years. HGR Plumbing also provides a warranty on our installation workmanship. We will review all warranty details with you before your replacement so you understand your coverage.
DIY tankless water heater replacement is generally not recommended due to the complexity of gas lines, high-voltage electricity, water connections and venting requirements. Improper installation can lead to dangerous gas leaks, carbon monoxide poisoning, water damage or electrical hazards. It is best to hire a licensed and experienced plumber like HGR Plumbing.
A standard tankless water heater replacement typically takes between 4 and 8 hours. This timeframe can vary based on whether we are replacing an existing tankless unit with a similar model or upgrading from a traditional tank water heater. A tank conversion can call for more extensive changes to gas lines, electrical or venting.
Most manufacturers offer 10 to 15 years on the heat exchanger and about 5 years on parts for residential use. We add our own labor warranty and register the unit on your behalf.
What People Are Saying About Our Plumbing Experts?

Emily R.
I called HGR Plumbing for plumbing repair, and the technician was fast, polite, and thorough. They explained the problem clearly and fixed it the same day. I will definitely hire them again. Highly recommended!
Plumbing Repair · Dunwoody, GA
Daniel K.
A pipe burst at 11 pm and they actually answered. The plumber showed up within the hour, shut everything down, and had us back to normal the next morning. Could not ask for more.
Emergency Plumbing · Alpharetta, GA
Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Roswell, GA
James P.
Our commercial plumbing system had a leak under the sink, and HGR Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Alpharetta, GA
Sofia M.
Two new toilets installed in one visit, no mess left behind, and the tech even adjusted a faucet he noticed was dripping. Fair pricing and really friendly.
Toilet Installation · Brookhaven, GA
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · Johns Creek, GA













