Tankless Water Heater Replacement in Bothell, WA
Upgrade your water heating system with a high-efficiency tankless unit from FHN Plumbing in Bothell, WA, for long-term comfort and lower bills.
- Code Compliant
- Expert Plumbers
- Licensed Gas Line Technicians
- Manufacturer Warranty Registration
Get Your New Tankless Water Heater Installed in Bothell, WA.
Our certified plumbers are ready to install your new, efficient tankless water heater.
Your Go-To for Tankless Water Heater Replacement in Bothell, WA
FHN 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:
- Precise sizing and installation of new tankless units.
- Correct venting and condensate drainage system setup.
- Scale prevention with isolation valves and inline filtration options

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

Customers
Why Choose FHN Plumbing for Tankless Water Heater Replacement in Bothell, WA?
Many rural Washington homes rely on private wells, and some carry iron, manganese or other minerals that call for testing and treatment. Hard water is rough 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 holds up to your local water supply.
- Longer Lifespan, Tankless water heaters usually last longer than conventional tank units, often up to 20 years with proper maintenance, giving you better long-term value.
- Energy Savings, Tankless water heaters only heat water when you need it, which can significantly reduce energy use compared to traditional tank models, a big plus for Washington utility bills.
- Right-Sized Units, We calculate gallons per minute and temperature rise for your fixtures instead of estimating from square footage.
Citywide Coverage
Whether your tankless sits on an exterior wall, in a garage or inside a utility closet, we cover all of Bothell with the same scheduling and pricing. Most replacements are scheduled within a day or two.
Experienced Team
Our team of licensed plumbers has broad experience with all major tankless water heater brands and models. They undergo ongoing training to stay current on installation techniques and safety protocols for this specialized equipment.
Safety-First Approach
We follow local code and manufacturer instructions for gas piping, combustion air, condensate disposal and venting terminations. Permits are pulled where required, and we test combustion before we leave.
Trusted Certified Bothell Plumbing Services Professionals
At FHN Plumbing, we take pride in providing licensed, certified plumbing services throughout Bothell, WA. 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 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 Bothell, WA
Rinnai Tankless Water Heater Replacement in Bothell
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 Bothell. 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.

Residential Tankless Water Heater Replacement in Bothell
For homeowners in Bothell, 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 right 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 all necessary gas and water line adjustments and venting changes to meet current codes.
Navien Tankless Water Heater Replacement in Bothell, 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 Bothell, 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.
Commercial Tankless Replacement in Bothell
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 share the load. We check gas pressure under full demand, since commercial racks can draw more than 600,000 BTU combined. Scheduling is easy to work around, so we can work after hours and keep your business open. We also set up a descaling schedule matched to your water usage.
Emergency Tankless Water Heater Replacement in Bothell
A sudden tankless water heater failure can leave your Bothell home without hot water, which is a major inconvenience. FHN Plumbing offers emergency tankless water heater replacement to restore your hot water fast. We put a priority on 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 cut down your downtime and get your home back to normal with reliable hot water.
Like-for-Like Tankless Swaps in Bothell
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 done in four to six hours.
Commercial Tankless Water Heater Replacement in Bothell, WA
Businesses in Bothell, WA often need robust hot water solutions, and tankless systems can provide the efficiency and capacity needed. We regularly replace 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 reliable hot water supply that meets your business's demands and health code requirements.

Tank to Tankless Conversions in Bothell, WA
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 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.
Tankless Water Heater Replacement Near Me in Bothell, WA
Do not compromise on your home's hot water supply. For dependable tankless water heater replacement near me in Bothell, 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.
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 Bothell, offering reliable solutions and upfront pricing to our neighbors throughout the community.
FHN Plumbing at a Glance
- Fully licensed plumbing team covering Bothell, WA
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.9-star rated by 382+ Washington customers
Bothell Map
Bothell Information
- Population
- 50,213
- Area codes
- 425/206/360
- Service area
- Bothell and communities within 40 miles
- Nearby
- Kirkland, Shoreline, Redmond, Bellevue
Many rural Washington homes rely on private wells, and some carry iron, manganese or other minerals that call for testing and treatment. Scale builds inside tankless heat exchangers over time, so a properly sized replacement with flush valves protects homes in Bothell, WA from early failures.
Expert Services
Trust our professionals for reliable FHN Plumbing solutions in Bothell, WA.
Our Specialized Plumbing Services in Bothell, WA
At FHN Plumbing, we provide a complete range of plumbing services across Bothell, 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 Bothell, WA
Our tankless water heater replacement process in Bothell, WA is designed to be straightforward and efficient, so you get reliable hot water with minimal hassle.
Request a Quote
Call us at (425) 491-3131 or fill out our online form to schedule an initial consultation. We will discuss your hot water needs and current system issues, and provide a detailed, upfront estimate.
On-Site Assessment
Our licensed plumber will visit your Bothell home to assess your existing water heating system, plumbing, gas or electrical connections and venting. This helps us recommend the best tankless model and make sure it is properly sized for your household.
Expert Installation
Once you approve the quote, our team will proceed with the professional installation of your new tankless water heater. We carefully remove the old unit, make any needed plumbing or gas line changes, and make sure the new system is correctly vented and fully operational.
Frequently Asked Questions About Tankless Water Heater Replacement in Bothell
The cost for tankless water heater replacement in Bothell, WA 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.
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 for you.
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.
A direct swap usually takes four to six hours. A tank to tankless conversion with new gas and venting usually takes a full day.
Yes, you can absolutely 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.
To protect the life and efficiency of your new tankless water heater, regular maintenance is key, especially in areas with hard water. This typically involves annual flushing to remove mineral buildup, checking the air filter, and inspecting gas and water connections. FHN Plumbing offers maintenance plans to help keep your unit in top condition.
A standard tankless water heater replacement, if you are upgrading from an existing tankless unit, usually 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.
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. FHN Plumbing also provides a labor warranty on our installation work for your peace of mind. We will discuss 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. FHN Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Redmond, 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 · Bellevue, 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 · Shoreline, 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 · Bothell, 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 · Bellevue, 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 · Bothell, WA













