Tankless Water Heater Replacement in Olympia, WA
For reliable, endless hot water in your Olympia, WA home, a new tankless water heater is an excellent choice.
- Quick Tankless Installation
- Isolation Valves Installed Standard
- Licensed Gas Line Technicians
- Reliable Hot Water
Get Your New Tankless Water Heater Installed in Olympia, WA.
Our licensed plumbers are ready to install your new, efficient tankless water heater.
Your Go-To for Tankless Water Heater Replacement in Olympia, WA
FHN 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:
- Expert removal and disposal of old water heaters.
- Careful sizing and installation of new tankless units.
- Clean integration with existing plumbing and gas lines.

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

Customers
Why Choose FHN Plumbing for Tankless Water Heater Replacement in Olympia, WA?
We understand the plumbing challenges homes face in Washington and are equipped to handle any complexities involved in swapping your old tankless unit for a new, reliable one.
- Increased Lifespan, Modern tankless water heaters often last twice as long as conventional tank models, offering a better long-term investment.
- Endless Hot Water, Never run out of hot water, even during peak demand, a true luxury for busy Olympia households with multiple showers or large families.
- Scale Protection, Every install includes isolation valves so the heat exchanger can be descaled without cutting into the pipes.
Citywide Coverage
FHN Plumbing is proud to serve every neighborhood of Olympia, so no matter where you are, expert tankless water heater replacement is just a call away. We understand the different housing types across Olympia 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 understand which older units can be matched to existing venting and which need new runs.
Safety-First Approach
Safety and code compliance are paramount in every tankless water heater replacement we perform. Our installations follow all Washington and local Olympia plumbing and gas codes, so your system runs safely and efficiently.
Trusted Certified Olympia Plumbing Services Professionals
At FHN Plumbing, we take pride in providing licensed, certified plumbing services throughout Olympia, 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 Olympia, WA
Rinnai Tankless Water Heater Replacement in Olympia
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, FHN Plumbing provides expert Rinnai tankless water heater replacement in Olympia. We make sure your new Rinnai unit is installed correctly, extending its efficiency and lifespan. Our technicians are familiar with the installation requirements and venting options for Rinnai models, so the upgrade goes cleanly.

Exterior Mount Tankless Units in Olympia, WA
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 wear out plastic covers and wiring over time. Disconnecting hoses, insulating crawlspace pipes and protecting hose bibs before the first freeze prevents most winter damage. 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.
Emergency Tankless Replacement in Olympia, WA
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 on arrival. Call (425) 491-3131 anytime your tankless quits.
Like-for-Like Tankless Swaps in Olympia
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.
Condensing Tankless Replacement in Olympia
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 low-cost 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 Olympia 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.
Tankless vs. Tank Water Heater Conversion in Olympia, WA
Considering converting from a traditional tank water heater to a tankless system in your Olympia, WA 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 makes for a smooth transition, so you can enjoy the long-term benefits of a modern, efficient tankless system.
Commercial Tankless Water Heater Replacement in Olympia, WA
Businesses in Olympia, WA 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 experienced 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.

Navien Tankless Water Heater Replacement in Olympia, 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 Olympia, WA, you can count on FHN 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 Water Heater Replacement Near Me in Olympia, WA
Local service matters because tankless problems often show up during the busiest part of your day. Our techs are close by and can figure out 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 in Olympia, 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 are known for quick response times and reliable service for all tankless installations.
FHN Plumbing at a Glance
- Licensed and insured plumbers serving Olympia, WA
- Same-day appointments and 24/7 emergency response
- Clear written estimates, no hidden fees
- 4.9-star rated by 382+ Washington customers
Olympia Map
Olympia Information
- Population
- 55,733
- Area codes
- 360/564/253
- Service area
- Olympia and communities within 40 miles
- Nearby
- Lacey, Lakewood, Tacoma, South Hill
Soft water can be slightly corrosive to copper over time, which sometimes shows up as pinhole leaks in older supply lines. Scale builds inside tankless heat exchangers over time, so a properly sized replacement with flush valves helps protect homes in Olympia, WA from early failures.
Expert Services
Trust our professionals for reliable FHN Plumbing solutions in Olympia, WA.
Our Specialized Plumbing Services in Olympia, WA
At FHN Plumbing, we provide a complete range of plumbing services across Olympia, 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 Olympia, WA
Replacing a tankless heater takes planning around gas, venting and water. Here is how we keep it simple.
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 detailed, 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 Olympia
The cost of tankless water heater replacement in Olympia, WA usually ranges from $3,000 to $6,000, depending on the unit's capacity, brand, complexity of installation, such as converting from a tank model, and any needed electrical or gas line upgrades. This price usually includes the unit itself and labor. We provide a detailed, upfront quote after a thorough assessment of your home.
Well-maintained tankless units can last 15 to 20 years. In hard water areas without regular descaling, heat exchangers can fail much sooner. Annual flushing makes the biggest difference.
Yes, you can certainly replace a traditional tank water heater with a tankless unit. This is a common upgrade for homeowners looking for better energy efficiency and endless hot water. However, it often requires changes to gas lines, venting and possibly electrical wiring, making professional installation important for safety and performance.
Yes, tankless water heaters are usually 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, especially in homes with varying hot water usage.
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.
Yes, in most areas of Olympia and Washington, a permit is required for tankless water heater replacement, especially if it involves gas line changes or major electrical work. Our team at FHN Plumbing will handle all necessary permitting so your installation is fully compliant with local building codes and safety regulations.
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 additional plumbing, gas or electrical changes required for proper installation and venting.
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 order and install other brands based on your preference or home requirements.
What People Are Saying About Our Plumbing Experts?

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 · Lakewood, WA
Patricia H.
We had a slab leak that two other companies could not find. FHN Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · South Hill, 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 · Lacey, WA
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 · Olympia, 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 · Olympia, 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 · Lacey, WA













