Tankless Water Heater Replacement in Alpharetta, GA
Get endless hot water back in your Alpharetta, GA home with a tankless water heater replacement done the right way, from gas line sizing to venting and descaling valves.
- Same-Day Replacement Available
- Expert Plumbers
- Upfront Pricing
- Quick Tankless Installation
Endless Hot Water Starts With One Call in Alpharetta, GA.
Call HGR Plumbing today for a free estimate on your tankless water heater replacement.
Your Go-To for Tankless Water Heater Replacement in Alpharetta, GA
HGR Plumbing handles every part of a tankless swap, including removing the old unit, upgrading the gas line if needed, installing new concentric or PVC venting and adding service valves for annual flushing. You get a clean, code-compliant install and a walkthrough of how to keep the heat exchanger in good shape.
Our expertise includes:
- Scale prevention with isolation valves and inline filtration options
- Condensing unit installs with PVC venting and condensate neutralizers
- Precise sizing and installation of new tankless units.

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

Customers
Why Choose HGR Plumbing for Tankless Water Heater Replacement in Alpharetta, GA?
Our experience means your new tankless unit is installed correctly the first time, avoiding common issues that come from improper sizing or connection.
- Clean Venting, We route venting to meet manufacturer clearances from windows, doors and roof edges.
- Increased Lifespan, Modern tankless water heaters often last much longer than conventional tank models, offering a better long-term investment.
- Longer Lifespan, Tankless water heaters typically last longer than conventional tank units, often up to 20 years with proper maintenance, offering better long-term value.
Citywide Coverage
Whether your tankless sits on an exterior wall, in a garage or inside a utility closet, we cover all of Alpharetta with the same scheduling and pricing. Most replacements are booked within a day or two.
Experienced Team
Our team installs tankless heaters every week and trains on manufacturer-specific setup, including recirculation programming and altitude settings. That experience shortens install time and prevents callbacks.
Safety-First Approach
Tankless heaters burn a lot of gas at full fire, so we pressure test gas connections and verify meter capacity before lighting the unit. Venting is installed and sealed to keep carbon monoxide from entering living space.
Trusted Certified Alpharetta Plumbing Services Professionals
At HGR Plumbing, we take pride in providing certified plumbing services throughout Alpharetta, GA. Backed by recognized 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 long-lasting results you can trust.
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PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationProfessional Tankless Water Heater Replacement Services in Alpharetta, GA
Emergency Tankless Replacement in Alpharetta, GA
A tankless heater that leaks from the heat exchanger or refuses to ignite can leave you with no hot water at all. We offer same-day emergency replacement for common models and can usually get a unit installed the day you call. If your exact model is not in stock, we can sometimes do a temporary repair to restore hot water while the replacement ships. We shut off gas and water to stop any leak as soon as we arrive. Call (770) 470-3778 anytime your tankless quits.

Commercial Tankless Water Heater Replacement in Alpharetta, GA
Businesses in Alpharetta, GA often need robust hot water solutions, and tankless systems can provide the efficiency and capacity needed. We regularly replace commercial tankless units for restaurants, offices and other facilities with minimal disruption to your operations. Our plumbers are experienced with high-capacity models and complex plumbing layouts. We deliver a reliable hot water supply that meets your business's demands and health code requirements.
Commercial Tankless Replacement in Alpharetta
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 split the load. We check gas pressure under full demand, since commercial racks can draw more than 600,000 BTU combined. Scheduling is flexible, so we can work after hours and keep your business open. We also set up a descaling schedule matched to your water usage.
Navien Tankless Water Heater Replacement in Alpharetta, 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 Alpharetta, 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 optimizing your new Navien's performance, so you benefit from its energy-saving features and reliable hot water output.
Tankless vs. Tank Water Heater Replacement Cost in Alpharetta, GA
When considering tankless water heater replacement in Alpharetta, GA, it is natural to compare costs. While the initial installation of a tankless unit can be higher than a traditional tank, the long-term energy savings and longer lifespan often make it the more cost-effective choice. We provide honest, upfront pricing for both options. That helps you make an informed decision based on your budget and hot water needs, with no surprises.
Exterior Mount Tankless Units in Alpharetta, GA
Many homes have tankless heaters mounted on an exterior wall with no venting at all, since the unit exhausts directly outside. These units face sun, rain and temperature swings, which can break down plastic covers and wiring over time. Northern and higher-elevation areas see more frozen-pipe calls than the south, where a deep freeze may only come every few winters. When we replace them, we check the pipe cover, freeze protection settings and the electrical connection. We can add a protective pipe cover kit to guard the water and gas lines. Exterior models are often the simplest swap when the gas line is already sized correctly.
Gas Tankless Water Heater Replacement in Alpharetta
Many homes in Alpharetta rely on natural gas for water heating, and gas tankless units are a highly 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, preventing potential hazards and maximizing efficiency.

Tank to Tankless Conversions in Alpharetta, 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 evaluate 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 Alpharetta, GA
If you are searching for tankless water heater replacement near me in Alpharetta, 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 pride ourselves on quick response times and reliable service for all tankless installations.
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 Alpharetta with trucks loaded for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
HGR Plumbing at a Glance
- Fully licensed plumbing team covering Alpharetta, GA
- 24/7 emergency service with same-day scheduling
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 357+ Georgia customers
Alpharetta Map
Alpharetta Information
- Population
- 67,056
- Area codes
- 470/770/678
- Service area
- Alpharetta and communities within 40 miles
- Nearby
- Johns Creek, Roswell, Dunwoody, Sandy Springs
Private wells still serve a large 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 correctly sized replacement with flush valves helps protect homes in Alpharetta, GA from early failures.
Expert Services
Trust our professionals for reliable HGR Plumbing solutions in Alpharetta, GA.
Our Specialized Plumbing Services in Alpharetta, GA
At HGR Plumbing, we provide a complete range of plumbing services across Alpharetta, 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 Alpharetta, GA
We follow a proven method for every tankless water heater replacement in Alpharetta, from initial assessment to final testing, for a high-quality installation.
Request a Quote
Contact HGR Plumbing today at (770) 470-3778 to schedule an on-site evaluation for your tankless water heater replacement. Our team will discuss your hot water needs and provide a clear, transparent estimate.
Unit Selection
Based on your home's demands and existing setup, we will help you choose the ideal tankless water heater model. We consider factors like fuel type, flow rate and energy efficiency.
Expert Installation
Our licensed plumbers will expertly remove your old unit and install the new tankless water heater. We make sure all gas, water and vent connections meet Georgia code requirements for safety and performance.
Frequently Asked Questions About Tankless Water Heater Replacement in Alpharetta
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.
Yes, tankless water heaters are generally more energy-efficient than traditional tank models. They only heat water on demand, eliminating the standby heat loss that comes with keeping a large tank of water hot. This can lead to real savings on your utility bills over time, particularly in homes with varying hot water usage.
New tankless water heaters typically come with a manufacturer's warranty, which usually covers the heat exchanger for 10 to 15 years and parts for 3 to 5 years. HGR Plumbing also provides a labor warranty on our installation work for your peace of mind. We will discuss warranty details for your chosen unit during your consultation.
A standard tankless water heater replacement usually 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.
Well-maintained tankless units can last 15 to 20 years. In hard water areas without regular descaling, heat exchangers can fail far sooner. Annual flushing makes the largest difference.
HGR Plumbing installs and replaces all major reputable brands of tankless water heaters. Our preferred brands include Rinnai, Navien, Noritz and Rheem, as they are known for their reliability, energy efficiency and long-term performance. We can also order and install other brands based on your preference or home requirements.
A direct swap typically takes four to six hours. A tank to tankless conversion with new gas and venting typically takes a full day.
Most jurisdictions in Georgia require a permit for water heater replacement, especially when gas piping or venting changes. We handle permits where they are required.
What People Are Saying About Our Plumbing Experts?

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 · Johns Creek, GA
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 · Marietta, 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 · Sandy Springs, GA
Mark T.
When our office needed drain cleaning, HGR Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Dunwoody, GA
Patricia H.
We had a slab leak that two other companies could not find. HGR Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Roswell, 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 · Roswell, GA













