Tankless Water Heater Replacement in Horn Lake, MS
From aging Rinnai and Takagi units to tank-to-tankless swaps, we handle tankless water heater replacement in Horn Lake, MS with clean installs and clear pricing.
- Code Compliant
- Isolation Valves Installed on Every Job
- Top Brands Available
- Quick Tankless Installation
Expert Tankless Water Heater Replacement in Horn Lake, MS.
Our techs carry common tankless models and venting kits, so most swaps wrap up in a single visit.
Your Go-To for Tankless Water Heater Replacement in Horn Lake, MS
DFM Plumbing specializes in professional tankless water heater replacement for homes across Horn Lake, MS. We know that upgrading to a tankless system is a real investment. Our goal is to provide a seamless installation that gets the most from your energy efficiency and hot water supply.
Our expertise includes:
- Safe gas and electric line connections for new units.
- Careful sizing and installation of new tankless units.
- Clean integration with existing plumbing and gas lines.

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

Customers
Why Choose DFM Plumbing for Tankless Water Heater Replacement in Horn Lake, MS?
A tankless heater is only as good as its gas supply and venting. We measure both before we quote, so your new unit fires at full output instead of shutting down on high demand.
- Space Saving, Their compact design lets tankless units fit in smaller spaces, freeing up valuable room in your utility closet or garage.
- Right-Sized Units, We calculate gallons per minute and temperature rise for your fixtures instead of guessing from square footage.
- Scale Protection, Every install includes isolation valves so the heat exchanger can be descaled without cutting into the pipes.
Citywide Coverage
DFM Plumbing is proud to serve every neighborhood of Horn Lake, so no matter where you are, expert tankless water heater replacement is just a call away. We understand the different housing types across Horn Lake and tailor our service to each home's needs.
Experienced Team
Our team installs tankless heaters regularly and trains on manufacturer-specific setup, including recirculation programming and altitude settings. That experience shortens install time and cuts down on callbacks.
Safety-First Approach
Safety and code compliance are paramount in every tankless water heater replacement we perform. Our installations follow all Mississippi and local Horn Lake plumbing and gas codes, so your system operates safely and efficiently.
Trusted Certified Horn Lake Plumbing Services Professionals
At DFM Plumbing, we take pride in providing licensed, certified plumbing services throughout Horn Lake, MS. 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 CertificationDependable Tankless Water Heater Replacement Services in Horn Lake, MS
Electric Tankless Water Heater Replacement in Horn Lake, MS
For properties without natural gas access or those looking for an all-electric solution, electric tankless water heaters are a practical choice. DFM Plumbing offers electric tankless water heater replacement services in Horn Lake, MS. This often involves close assessment of your home's electrical panel capacity, as these units require substantial 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 Horn Lake
Many homes in Horn Lake 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 Mississippi and local codes, heading off potential hazards and maximizing efficiency.
Tank to Tankless Conversions in Horn Lake, MS
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. Plan for a conversion to take a full day.
Commercial Tankless Replacement in Horn Lake
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.
Condensing Tankless Replacement in Horn Lake
Condensing tankless units like the Navien NPE series or Rinnai Sensei reach efficiencies above 90 percent by capturing heat from exhaust gases. They vent through inexpensive 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. Constant moisture speeds up corrosion on metal pipes and fittings and encourages mold around slow leaks. 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.
Residential Tankless Water Heater Replacement in Horn Lake
For homeowners in Horn Lake, upgrading to a tankless water heater offers real benefits like endless hot water and reduced energy use. We assess your household's hot water demand to recommend the ideal sized unit, so you get optimal performance. Our team handles everything from safely disconnecting your old unit to installing the new tankless system. That includes any needed gas and water line adjustments and venting changes to meet current codes.
Tankless vs. Tank Water Heater Conversion in Horn Lake, MS
Considering converting from a traditional tank water heater to a tankless system in your Horn Lake, MS home? This is a common and worthwhile 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 makes for a smooth transition, so you can enjoy the long-term benefits of a modern, efficient tankless system.

Exterior Mount Tankless Units in Horn Lake, 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. Wrapping exposed lines and letting faucets drip on the coldest nights prevent most of the damage a sudden freeze can cause. 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 easiest swap when the gas line is already sized correctly.
Tankless Water Heater Replacement Near Me in Horn Lake, MS
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 solid labor coverage and register your manufacturer warranty for you.
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 Horn Lake with trucks loaded for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
DFM Plumbing at a Glance
- Licensed and insured plumbers serving Horn Lake, MS
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.8-star rated by 503+ Mississippi customers
Horn Lake Map
Horn Lake Information
- Population
- 26,468
- Area codes
- Local
- Service area
- Horn Lake and communities within 40 miles
- Nearby
- Southaven, Olive Branch, Oxford, Tupelo
Replacing an old tankless water heater in Horn Lake, MS is essential for a reliable hot water supply, especially with shifting seasonal demands and mineral content that can cut into unit efficiency and lifespan.
Expert Services
Trust our professionals for reliable DFM Plumbing solutions in Horn Lake, MS.
Our Specialized Plumbing Services in Horn Lake, MS
At DFM Plumbing, we provide a complete range of plumbing services across Horn Lake, 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 Horn Lake, MS
We make sure every step, from first consultation to final installation, is handled with professionalism and attention to detail.
Request a Quote
Call (601) 265-9260 with your current model number and a photo of the install. We give you a rough 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 Horn Lake
The cost for tankless water heater replacement in Horn Lake, MS usually ranges from $3,000 to $6,000, depending on the unit's brand, capacity, fuel type (gas or electric) and any needed changes to gas lines, electrical or venting. This estimate includes both the new unit and professional installation. We will provide a detailed quote upfront after assessing your needs.
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.
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 typically the better value.
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.
Tankless water heater replacement is a complex job that involves gas lines, electrical wiring, water connections and venting. It is highly recommended to hire a licensed professional like DFM Plumbing due to the safety risks and potential for improper installation, which can lead to leaks, gas hazards or inefficient operation. Professionals also protect code compliance and warranty validity.
To prepare for tankless water heater replacement, make sure the area around your existing unit is clear and accessible for our plumbers. If possible, clear a path to the installation site and keep pets or children away from the work area. We will handle draining the old unit and all other technical preparations.
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.
DIY tankless water heater replacement is usually 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 DFM Plumbing.
What People Are Saying About Our Plumbing Experts?

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 · Horn Lake, 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 · Olive Branch, 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 · Greenville, MS
Emily R.
I called DFM 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 · Tupelo, 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 · Greenville, MS
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 · Southaven, MS













