Tankless Water Heater Replacement in Longview, WA
For reliable, endless hot water in your Longview, WA home, a new tankless water heater is an excellent choice.
- Same-Day Replacement Available
- Quick Tankless Installation
- Dependable Hot Water
- Manufacturer Warranty Registration
Need a Tankless Water Heater Replacement in Longview, WA?
Contact us today for a free estimate and see the benefits of on-demand hot water.
Your Go-To for Tankless Water Heater Replacement in Longview, WA
When your old tankless unit is failing or you are ready to switch from a traditional tank, FHN Plumbing offers reliable tankless water heater replacement. Our licensed plumbers make sure your new system is sized correctly and installed to meet local Longview, WA codes. That gives you on-demand hot water for years to come.
Our expertise includes:
- Proper venting and condensate drainage system setup.
- Precise sizing and installation of new tankless units.
- Gas line sizing and upsizing for 199,000 BTU tankless units

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

Customers
Why Choose FHN Plumbing for Tankless Water Heater Replacement in Longview, WA?
Municipal water west of the mountains in Washington is typically soft, while supplies on the drier east side tend to run harder. 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.
- Right-Sized Units, We calculate gallons per minute and temperature rise for your fixtures instead of guessing from square footage.
- Increased Lifespan, Modern tankless water heaters often last twice as long as conventional tank models, offering a better long-term investment.
- 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
FHN Plumbing is proud to serve every neighborhood of Longview, so no matter where you are, expert tankless water heater replacement is just a call away. We understand the diverse housing types across Longview and tailor our service to each home's needs.
Experienced Team
Our technicians have pulled and replaced tankless units from Rinnai, Navien, Noritz, Takagi and Rheem, so they know the quirks of each brand's error codes and mounting brackets. They also know which older units can be matched to existing venting and which need new runs.
Safety-First Approach
Safety is our top priority for every tankless water heater replacement. We adhere strictly to all local Washington plumbing and gas codes, so your new unit is installed securely and runs without risk.
Trusted Certified Longview Plumbing Services Professionals
At FHN Plumbing, we take pride in providing licensed, certified plumbing services throughout Longview, WA. 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.
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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 Longview, WA
Tankless vs. Tank Water Heater Replacement Cost in Longview, WA
When considering tankless water heater replacement in Longview, WA, it is natural to compare costs. While the upfront 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.

Tankless vs. Tank Water Heater Conversion in Longview, WA
Thinking about converting from a traditional tank water heater to a tankless system in your Longview, WA 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.
Electric Tankless Water Heater Replacement in Longview, WA
For properties without natural gas access or those looking for an all-electric solution, electric tankless water heaters are a practical choice. FHN Plumbing offers electric tankless water heater replacement services in Longview, WA. This often involves close 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 effectively, providing on-demand hot water without the need for gas lines.
Navien Tankless Water Heater Replacement in Longview, WA
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 Longview, WA, you can count on FHN Plumbing. We have extensive 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.
Like-for-Like Tankless Swaps in Longview
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 seized. Most like-for-like swaps are finished in four to six hours.
Recirculation Tankless Upgrades in Longview, WA
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.
Condensing Tankless Replacement in Longview
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. East side homes near Longview and beyond face bigger temperature swings, which put extra stress on pipes, fittings and outdoor plumbing. 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.

Rinnai Tankless Water Heater Replacement in Longview
Rinnai is a leading brand in the tankless water heater market, known for its quality and innovation. If your Rinnai unit is aging or acting up, FHN Plumbing provides expert Rinnai tankless water heater replacement in Longview. 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 cleanly.
Tankless Water Heater Replacement Near Me in Longview, WA
Do not compromise on your home's hot water supply. For dependable tankless water heater replacement near me in Longview, choose FHN Plumbing. We provide upfront estimates, transparent communication and expert workmanship, making your upgrade to endless hot water a simple and stress-free experience.
If you are searching for tankless water heater replacement near me in Longview, WA, FHN Plumbing is your local expert. Our service area covers the entire 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.
FHN Plumbing at a Glance
- Licensed and insured plumbers serving Longview, WA
- Same-day appointments and 24/7 emergency response
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 382+ Washington customers
Longview Map
Longview Information
- Population
- 37,925
- Area codes
- 360/564/503
- Service area
- Longview and communities within 40 miles
- Nearby
- Vancouver, Olympia, Lacey, Lakewood
Municipal water west of the mountains in Washington is typically soft, while supplies on the drier east side tend to run harder. Scale builds inside tankless heat exchangers over time, so a correctly sized replacement with flush valves helps protect homes in Longview, WA from early failures.
Expert Services
Trust our professionals for reliable FHN Plumbing solutions in Longview, WA.
Our Specialized Plumbing Services in Longview, WA
At FHN Plumbing, we provide a complete range of plumbing services across Longview, WA. 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 Longview, WA
We keep the process easy to follow from the first call to the final combustion test.
Request a Quote
Contact FHN Plumbing today at (425) 491-3131 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 right 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 Washington code requirements for safety and performance.
Frequently Asked Questions About Tankless Water Heater Replacement in Longview
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.
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 FHN 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.
To prepare for tankless water heater replacement, make sure the area around your existing unit is clear and easy to reach for our plumbers. If possible, clear a path to the installation site and keep pets or children safely out of the work area. We will handle draining the old unit and all other technical preparations.
With proper installation and regular maintenance, a new tankless water heater usually lasts 20 to 25 years. This is much longer than traditional tank water heaters, which usually last 10 to 15 years. Regular flushing and descaling can help extend the life of your tankless unit, especially in areas with hard water.
FHN Plumbing installs and replaces all major trusted 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 source and install other brands based on your preference or home requirements.
Most jurisdictions in Washington require a permit for water heater replacement, especially when gas piping or venting changes. We take care of permits where they are required.
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.
What People Are Saying About Our Plumbing Experts?

James P.
Our commercial plumbing system had a leak under the sink, and FHN Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Lakewood, WA
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 · Longview, WA
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 · Vancouver, WA
Mark T.
When our office needed drain cleaning, FHN Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Longview, WA
Emily R.
I called FHN 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 · Vancouver, WA
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 · South Hill, WA













