Tankless Water Heater Replacement in Columbus, MS
Worn-out tankless unit throwing error codes? We replace tankless water heaters across Columbus, MS with right-sized, scale-protected units that provide steady hot water.
- Same-Day Replacement Available
- Code Compliant
- Transparent Pricing
- Licensed Gas Line Technicians
Need a New Tankless Water Heater in Columbus, MS?
Our certified plumbers are ready to install your new, efficient tankless water heater.
Tankless Water Heater Replacement in Columbus, MS Built for Hard Water
DFM Plumbing replaces failing tankless water heaters with condensing and non-condensing units sized to your home's real flow demand. We check gas supply, venting clearances and water hardness before recommending a model. That way the new heater is not starved for fuel or clogged by scale.
Our expertise includes:
- Proper venting and condensate drainage system setup.
- Gas line sizing and upsizing for 199,000 BTU tankless units
- Correct sizing and model selection for your home.

Additional Plumbing Replacement Services in Columbus, MS
When repairs are no longer enough, our replacement services in Columbus, MS deliver modern, efficient equipment installed right.

Customers
Why Choose DFM Plumbing for Tankless Water Heater Replacement in Columbus, MS?
Iron can leave rusty stains on fixtures and laundry, and sulfur odors often trace back to the water heater anode or the well itself. Hard water is tough on tankless heat exchangers, and many early failures trace back to scale and skipped flushing. We size, install and set up each replacement so it stands up to your local water supply.
- Endless Hot Water, Never run out of hot water, even during peak demand, a true luxury for busy Columbus households with multiple showers or large families.
- Space Saving, Their compact design lets tankless units fit in smaller spaces, freeing up useful room in your utility closet or garage.
- Longer Lifespan, Tankless water heaters usually 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 Columbus with the same scheduling and pricing. Most replacements are booked within a day or two.
Experienced Team
When you choose DFM Plumbing, you get a team that knows the ins and outs of every major tankless brand. You can count on a precise and reliable installation for your home's requirements.
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 properly but also meets the highest safety standards.
Trusted Certified Columbus Plumbing Services Professionals
At DFM Plumbing, we take pride in providing certified plumbing services throughout Columbus, MS. 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 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 Columbus, MS
Rinnai Tankless Water Heater Replacement in Columbus
Rinnai is a leading brand in the tankless water heater market, known for its quality and innovation. If your Rinnai unit is aging or malfunctioning, DFM Plumbing provides expert Rinnai tankless water heater replacement in Columbus. We make sure your new Rinnai unit is installed correctly, maximizing its efficiency and lifespan. Our technicians know the installation requirements and venting options for Rinnai models, so the upgrade goes cleanly.

Recirculation Tankless Upgrades in Columbus, MS
If you are tired of running the tap while you wait for hot water, a tankless with a built-in recirculation pump can bring heat to the fixture in seconds. Navien A series and Rinnai units with internal pumps can use a dedicated return line or a crossover valve under the farthest sink. We program schedules so the pump runs only during your morning and evening peaks. That keeps gas use in check while saving thousands of gallons of wasted water a year. This upgrade is a favorite in long single-story ranch homes.
Exterior Mount Tankless Units in Columbus, MS
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. Freezing weather is infrequent in Mississippi, but a hard freeze every few winters can catch homes that were never built for it. 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 shield the water and gas lines. Exterior models are often the simplest swap when the gas line is already sized correctly.
Tankless vs. Tank Water Heater Conversion in Columbus, MS
Considering converting from a traditional tank water heater to a tankless system in your Columbus, MS home? This is a common and beneficial upgrade, but it requires specialized expertise. We handle the entire conversion, which can involve rerouting gas lines, upgrading electrical service, modifying water lines and installing new venting. Our team ensures a smooth transition, so you can enjoy the long-term benefits of a modern, efficient tankless system.
Emergency Tankless Replacement in Columbus, MS
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 often 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 (601) 265-9260 anytime your tankless quits.
Commercial Tankless Water Heater Replacement in Columbus, MS
Businesses in Columbus, MS often require robust hot water solutions, and tankless systems can provide the efficiency and capacity needed. We specialize in replacing commercial tankless units for restaurants, offices and other facilities with minimal disruption to your operations. Our plumbers are skilled with high-capacity models and complex plumbing layouts. We deliver a steady hot water supply that meets your business's demands and health code requirements.
Like-for-Like Tankless Swaps in Columbus
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 quickest 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 done in four to six hours.

Gas Tankless Water Heater Replacement in Columbus
Many homes in Columbus 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 Mississippi and local codes, preventing potential hazards and maximizing efficiency.
Tankless Water Heater Replacement Near Me in Columbus, MS
If you are searching for tankless water heater replacement near me, you want a local plumber who understands Mississippi water and gas codes. DFM Plumbing serves Columbus with trucks stocked for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
Local service matters because tankless problems often show up during the busiest part of your day. Our techs are close by and can diagnose whether a repair or replacement makes more sense. We back every replacement with clear labor coverage and register your manufacturer warranty for you.
DFM Plumbing at a Glance
- Fully licensed plumbing team covering Columbus, MS
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.8-star rated by 503+ Mississippi customers
Columbus Map
Columbus Information
- Population
- 23,035
- Area codes
- Local
- Service area
- Columbus and communities within 40 miles
- Nearby
- Starkville, Tupelo, Meridian, Oxford
Replacing an old tankless water heater in Columbus, MS is essential for a reliable hot water supply, especially with changing seasonal demands and mineral content that can affect unit efficiency and lifespan.
Expert Services
Trust our professionals for reliable DFM Plumbing solutions in Columbus, MS.
Our Specialized Plumbing Services in Columbus, MS
At DFM Plumbing, we provide a complete range of plumbing services across Columbus, MS. 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 Columbus, MS
Our tankless water heater replacement process is designed to be simple and stress-free for homeowners in Columbus, MS.
Request a Quote
Contact DFM Plumbing today at (601) 265-9260 to schedule an on-site evaluation for your tankless water heater replacement. Our team will discuss your hot water needs and provide a detailed, 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 carefully remove your old unit and install the new tankless water heater. We make sure all gas, water and vent connections meet Mississippi code requirements for safety and performance.
Frequently Asked Questions About Tankless Water Heater Replacement in Columbus
A like-for-like gas tankless replacement usually 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 we start any work.
We install Navien, Rinnai, Noritz, Takagi and Rheem tankless heaters. Each has its own strengths, and we recommend based on your flow needs, venting options and budget.
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 serious gas leaks, carbon monoxide poisoning, water damage or electrical hazards. It is best to hire a licensed and experienced plumber like DFM Plumbing.
A standard tankless water heater replacement, if you are upgrading from an existing tankless unit, typically 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 extra plumbing, gas or electrical changes required for proper installation and venting.
Repeated 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 typically the better value.
Yes, in most areas of Columbus and Mississippi, a permit is required for tankless water heater replacement, especially if it involves gas line changes or major electrical work. Our team at DFM Plumbing will handle all required permitting so your installation is fully compliant with local building codes and safety regulations.
DFM 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.
Most jurisdictions in Mississippi 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?

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 · Columbus, MS
Patricia H.
We had a slab leak that two other companies could not find. DFM Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Tupelo, MS
James P.
Our commercial plumbing system had a leak under the sink, and DFM Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Tupelo, MS
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 · Meridian, MS
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 · Meridian, MS
Mark T.
When our office needed drain cleaning, DFM Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Tupelo, MS













