Tankless Water Heater Replacement in Costa Mesa, CA
Get endless hot water back in your Costa Mesa, CA home with a tankless water heater replacement done right, from gas line sizing to venting and descaling valves.
- Isolation Valves Installed on Every Job
- Code Compliant
- Top Brands Available
- Prompt Tankless Replacement
Stop Waiting on Lukewarm Showers. Upgrade Your Tankless in Costa Mesa, CA.
Our licensed plumbers are ready to install your new, efficient tankless water heater.
Professional Tankless Water Heater Replacement in Costa Mesa, CA
FKM 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:
- Scale prevention with isolation valves and inline filtration options
- Gas line sizing and upsizing for 199,000 BTU tankless units
- Careful sizing and installation of new tankless units.
Additional Plumbing Replacement Services in Costa Mesa, CA
When repairs are no longer enough, our replacement services in Costa Mesa, CA deliver modern, efficient equipment installed right.
Customers
Why Choose FKM Plumbing for Tankless Water Heater Replacement in Costa Mesa, CA?
Our expertise means your new tankless unit is installed correctly the first time, avoiding common issues that come from improper sizing or connection.
- Space Saving, Their compact design lets tankless units fit in smaller spaces, freeing up useful room in your utility closet or garage.
- Clean Venting, We route venting to meet manufacturer clearances from windows, doors and roof edges.
- 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 Southern California utility bills.
Citywide Coverage
We replace tankless water heaters in every neighborhood of Costa Mesa, from newer builds with garage-mounted units to older homes converting from a tank. Our trucks carry venting kits and gas fittings for both interior and exterior installs.
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 perform careful safety checks after every tankless water heater replacement, including leak detection for gas lines and proper ventilation. You can rest assured your new system is safe and in line with Southern California regulations.
Trusted Certified Costa Mesa Plumbing Services Professionals
At FKM Plumbing, we take pride in providing licensed, certified plumbing services throughout Costa Mesa, CA. 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 CertificationReliable Tankless Water Heater Replacement Services in Costa Mesa, CA
Tank to Tankless Conversions in Costa Mesa, CA
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 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. Expect a conversion to take a full day.
Like-for-Like Tankless Swaps in Costa Mesa
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 stuck. Most like-for-like swaps are finished in four to six hours.
Commercial Tankless Replacement in Costa Mesa
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 easy to work around, so we can work after hours and keep your business open. We also set up a descaling schedule suited to your water usage.
Rinnai Tankless Water Heater Replacement in Costa Mesa
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, FKM Plumbing provides expert Rinnai tankless water heater replacement in Costa Mesa. 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 smoothly.
Exterior Mount Tankless Units in Costa Mesa, CA
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. On an occasional cold night, covering backflow preventers and outdoor valves is usually all it takes to avoid a break. 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 shield the water and gas lines. Exterior models are often the simplest swap when the gas line is already sized correctly.
Tankless vs. Tank Water Heater Replacement Cost in Costa Mesa, CA
When considering tankless water heater replacement in Costa Mesa, CA, 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 economical choice. We provide clear, upfront pricing for both options. That helps you make an informed decision based on your budget and hot water needs, with no surprises.
Emergency Tankless Replacement in Costa Mesa, CA
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 as soon as we arrive. Call (213) 871-0701 any time your tankless quits.
Emergency Tankless Water Heater Replacement in Costa Mesa
A sudden tankless water heater failure can leave your Costa Mesa home without hot water, which is a serious inconvenience. FKM 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.
Tankless Water Heater Replacement Near Me in Costa Mesa, CA
If you are searching for tankless water heater replacement near me in Costa Mesa, CA, FKM Plumbing is your local expert. Our service area covers the whole 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.
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 Costa Mesa, offering reliable solutions and upfront pricing to our neighbors throughout the community.
FKM Plumbing at a Glance
- Fully licensed plumbing team covering Costa Mesa, CA
- Same-day appointments and 24/7 emergency response
- Upfront, flat-rate pricing before work begins
- 4.8-star rated by 754+ Southern California customers
Costa Mesa Map
Costa Mesa Information
- Population
- 108,354
- Area codes
- 949/714/562
- Service area
- Costa Mesa and communities within 40 miles
- Nearby
- Newport Beach, Santa Ana, Huntington Beach, Tustin
Municipal water across much of Southern California is hard, leaving chalky scale on faucets, showerheads, and inside water heater tanks. Scale builds inside tankless heat exchangers over time, so a properly sized replacement with flush valves helps protect homes in Costa Mesa, CA from early failures.
Expert Services
Trust our professionals for reliable FKM Plumbing solutions in Costa Mesa, CA.
Our Specialized Plumbing Services in Costa Mesa, CA
At FKM Plumbing, we provide a complete range of plumbing services across Costa Mesa, CA. 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 Costa Mesa, CA
Our tankless water heater replacement process is designed to be straightforward and stress-free for homeowners in Costa Mesa, CA.
Request a Quote
Call FKM Plumbing today at (213) 871-0701 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 ideal 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 Southern California code requirements for safety and performance.
Frequently Asked Questions About Tankless Water Heater Replacement in Costa Mesa
A like-for-like gas tankless replacement usually 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 FKM Plumbing.
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 FKM 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.
Yes, in most areas of Costa Mesa and Southern California, a permit is required for tankless water heater replacement, especially if it involves gas line changes or major electrical work. Our team at FKM Plumbing will handle all required permitting so your installation is fully compliant with local building codes and safety regulations.
New tankless water heaters typically come with a manufacturer's warranty, which usually covers the heat exchanger for 10 to 15 years and parts for 3 to 5 years. FKM 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.
We do not recommend it. Gas line sizing, venting clearances and combustion testing call for training, and improper installs can void the warranty or create carbon monoxide hazards.
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.
New tankless water heaters usually come with a manufacturer's warranty on the heat exchanger, usually 10 to 15 years, and on parts, usually 3 to 5 years. FKM Plumbing also provides a warranty on our installation workmanship. We will go over all warranty details with you before your replacement so you understand your coverage.
What People Are Saying About Our Plumbing Experts?
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 · Santa Ana, CA
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 · Tustin, CA
Emily R.
I called FKM 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 · Costa Mesa, CA
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 · Tustin, CA
Patricia H.
We had a slab leak that two other companies could not find. FKM Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Westminster, CA
Mark T.
When our office needed drain cleaning, FKM Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Huntington Beach, CA