Tankless Water Heater Replacement in Billings, MT
Upgrade your water heating setup with a high-efficiency tankless unit from DFV Plumbing in Billings, MT, for long-term comfort and lower bills.
- Same-Day Replacement Available
- Top Brands Available
- Fast Tankless Installation
- Manufacturer Warranty Registration
Need a New Tankless Water Heater in Billings, MT?
Our techs carry common tankless models and venting kits, so most swaps wrap up in a single visit.
Dependable Tankless Water Heater Replacement Services in Billings, MT
When it comes to tankless water heater replacement in Billings, MT, DFV Plumbing is the trusted choice. We understand the demands that homes in Montana place on water heaters, from mineral content to changing usage. We make sure your new tankless unit is properly sized and carefully installed for strong performance and longevity.
Our expertise includes:
- Condensing unit installs with PVC venting and condensate neutralizers
- Gas line sizing and upsizing for 199,000 BTU tankless units
- Safe gas and electric line connections for new units.

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

Customers
Why Choose DFV Plumbing for Tankless Water Heater Replacement in Billings, MT?
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 cutting out on high demand.
- Energy Savings, Tankless water heaters only heat water when you need it, which can noticeably reduce energy use compared to traditional tank models, a big plus for Montana utility bills.
- Clean Venting, We route venting to meet manufacturer clearances from windows, doors and rooflines.
- Increased Lifespan, Modern tankless water heaters often last much longer than conventional tank models, offering a better long-term investment.
Citywide Coverage
DFV Plumbing proudly serves every neighborhood and community within Billings for all your tankless water heater replacement needs. Whether you are downtown or in the surrounding suburbs, our team is ready to deliver fast and professional service.
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 Montana and local Billings plumbing and gas codes, so your system operates safely and efficiently.
Trusted Certified Billings Plumbing Services Professionals
At DFV Plumbing, we take pride in providing certified plumbing services throughout Billings, MT. 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 CertificationEfficient Tankless Water Heater Replacement Services in Billings, MT
Tankless vs. Tank Water Heater Conversion in Billings, MT
Considering converting from a traditional tank water heater to a tankless system in your Billings, MT 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.

Tank to Tankless Conversions in Billings, MT
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 usually 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. Plan for a conversion to take a full day.
Condensing Tankless Replacement in Billings
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 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. Rapid temperature swings, including sudden warm winds in winter, can stress pipes and fittings that go from frozen to thawed quickly. 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 it.
Emergency Tankless Water Heater Replacement in Billings
A sudden tankless water heater failure can leave your Billings home without hot water, which is a major inconvenience. DFV Plumbing offers emergency tankless water heater replacement to restore your hot water fast. We prioritize 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.
Gas Tankless Water Heater Replacement in Billings
Many homes in Billings rely on natural gas for water heating, and gas tankless units are a very efficient option. Our gas tankless water heater replacement service includes careful 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 Montana and local codes, preventing potential hazards and maximizing efficiency.
Like-for-Like Tankless Swaps in Billings
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 seized. Most like-for-like swaps are finished in four to six hours.
Emergency Tankless Replacement in Billings, MT
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 (406) 512-8883 any time your tankless quits.

Rinnai Tankless Water Heater Replacement in Billings
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, DFV Plumbing provides expert Rinnai tankless water heater replacement in Billings. We make sure your new Rinnai unit is installed correctly, maximizing its efficiency and lifespan. Our technicians are familiar with the installation requirements and venting options for Rinnai models, so the upgrade goes smoothly.
Tankless Water Heater Replacement Near Me in Billings, MT
When your tankless unit needs replacing, you want a reliable local company. We aim to be the go-to choice for tankless water heater replacement near me in Billings, offering reliable solutions and upfront pricing to our neighbors throughout the community.
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.
DFV Plumbing at a Glance
- Licensed and insured plumbers serving Billings, MT
- 24/7 emergency service with same-day scheduling
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 917+ Montana customers
Billings Map
Billings Information
- Population
- 120,864
- Area codes
- 406/599/307
- Service area
- Billings and communities within 40 miles
- Nearby
- Lockwood, Laurel, Livingston, Lewistown
Replacing your tankless water heater in Billings, MT is a sound investment, especially with seasonal temperature swings and the need for efficient hot water in modern homes.
Expert Services
Trust our professionals for reliable DFV Plumbing solutions in Billings, MT.
Our Specialized Plumbing Services in Billings, MT
At DFV Plumbing, we provide a complete range of plumbing services across Billings, MT. 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 Billings, MT
We make sure every step, from first consultation to final installation, is handled with professionalism and care.
Request a Quote
Call (406) 512-8883 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 Billings
The cost for tankless water heater replacement in Billings, MT 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 always provide a detailed quote upfront after assessing your needs.
Yes, in most areas of Billings and Montana, a permit is required for tankless water heater replacement, especially if it involves gas line changes or major electrical work. Our team at DFV Plumbing will handle all required permitting so your installation is fully compliant with local building codes and safety regulations.
A direct swap usually takes four to six hours. A tank to tankless conversion with new gas and venting usually takes a full day.
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.
We install Navien, Rinnai, Noritz, Takagi and Rheem tankless heaters. Each has strengths, and we recommend based on your flow needs, venting options and budget.
Common signs that your tankless water heater needs replacement include frequent error codes, inconsistent water temperature, reduced hot water flow or a complete lack of hot water. If your unit is over 15 to 20 years old and repairs are becoming common and costly, replacement is often the more economical choice.
Yes. Softened or scale-treated water sharply 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 usually come with a manufacturer's warranty, which usually covers the heat exchanger for 10 to 15 years and parts for 3 to 5 years. DFV Plumbing also provides a labor warranty on our installation work for your peace of mind. We will go over warranty details for your chosen unit during your consultation.
What People Are Saying About Our Plumbing Experts?

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













