Electric Tankless Water Heater Installation in St. Louis, MO
Upgrade to endless hot water with an electric tankless water heater installation in St. Louis, MO. Our experienced plumbers ensure a seamless setup for your home.
- Skilled, Certified Plumbers
- Upfront Pricing
- Energy Efficient
- Panel Capacity Review Included
Your Go-To for Electric Tankless Water Heaters in St. Louis, MO.
Contact FGV Plumbing now to schedule your electric tankless water heater installation and enjoy endless hot water.
Reliable Electric Tankless Water Heater Installation for St. Louis, MO Homeowners
FGV Plumbing reviews your electrical panel, flow needs and incoming water temperature before recommending a unit. We coordinate with licensed electricians when added circuits or panel upgrades are needed.
Our expertise includes:
- Ensuring all local plumbing and electrical codes are met.
- Whole-home electric tankless units from Stiebel Eltron and Rheem
- Code Compliant Venting (if applicable)

Additional Plumbing Installation Services in St. Louis, MO
We install water heaters, pumps, lines, and fixtures across St. Louis, MO with precision workmanship that meets every local code.

Customers
Why Choose FGV Plumbing for Electric Tankless Water Heater Installation in St. Louis, MO?
Water heaters face heavy demand in winter, when incoming water is cold and households use more hot water. We match the unit to your home and incoming water temperature so you get steady hot water without surprises.
- Space Saving, These compact units mount on a wall, freeing up useful floor space in your garage or utility closet.
- Energy Savings, Heat water only when you need it, cutting down on wasted energy and utility bills.
- Space Savings, Wall-mounted units free up garage and closet space.
Citywide Coverage
FGV Plumbing proudly serves every neighborhood and community within St. Louis for electric tankless water heater installations. Whether you're in the heart of downtown or the surrounding suburbs, our licensed plumbers are ready to bring efficient hot water solutions to your doorstep.
Experienced Team
Our team works with Stiebel Eltron, Rheem, EcoSmart and Bosch electric tankless models. They know each brand's installation and wiring requirements.
Safety-First Approach
We install pressure relief where required and follow local plumbing code. Every installation is tested for proper temperature and flow before we head out.
Trusted Certified St. Louis Plumbing Services Professionals
At FGV Plumbing, we take pride in providing licensed, certified plumbing services throughout St. Louis, MO. 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 CertificationAdvanced Electric Tankless Water Heater Installation Services in St. Louis, MO
Converting from Tank to Electric Tankless in St. Louis, MO
Switching from a tank water heater to electric tankless can free up space and reduce standby energy loss. We remove the old tank and install the new wall-mounted unit. Water lines are rerouted and new isolation valves are installed. We also confirm electrical capacity and coordinate new circuits. The result is a cleaner, more compact setup.

Electric Tankless for Guest Suites and Additions in St. Louis, MO
Guest houses, guest suites and home additions often sit far from the main water heater. Running long hot water lines wastes water and energy. An electric tankless unit installed near the fixtures provides quick hot water. We size the unit for the space and its fixtures. This is an efficient solution for detached living spaces.
Rheem Electric Tankless Water Heater Installation in St. Louis
Rheem is a trusted name in water heating, offering a range of high-performance electric tankless models. FGV Plumbing is experienced with installing various Rheem units, known for their durability and efficiency. We ensure your Rheem unit is perfectly sized and correctly wired to provide optimal hot water delivery. Our team handles everything from securing the unit to the wall to making sure all electrical and water lines are properly connected and leak-free.
Residential Electric Tankless Heater Installation in St. Louis
For homeowners in St. Louis, we provide tailored electric tankless water heater installation services. We assess your household's hot water demand, existing electrical capacity and main water line size to recommend the perfect unit. Our team handles everything from permit acquisition to final testing, ensuring a hassle-free upgrade to endless hot water. Water heaters face heavy demand in winter, when incoming water is cold and families use more hot water.
Electrical Panel Review and Upgrades in St. Louis
Electric tankless water heaters can require a large amount of amperage depending on size. We review your panel capacity before installation. If your panel cannot support the unit, we coordinate with a licensed electrician for an upgrade. Proper wiring prevents tripped breakers and overheating. Planning ahead avoids costly surprises.
Upgrading from Tank to Tankless Electric in St. Louis
Many St. Louis homeowners are making the switch from traditional tank-style water heaters to electric tankless models. This upgrade often involves modifications to your electrical panel to handle the higher amperage draw of tankless units, as well as rerouting water lines. Our experts manage these complexities, making for a smooth transition and getting the most from the benefits of your new system.
Electric Tankless Water Heater Sizing and Selection in St. Louis
Choosing the right electric tankless water heater size is essential for performance. In St. Louis, factors like groundwater temperature and your household's simultaneous hot water usage determine the ideal GPM (gallons per minute) output required. FGV Plumbing provides expert consultation to help you select a unit that closely matches your demand, preventing cold showers and supporting efficiency. We consider your home's plumbing layout and electrical panel capacity to recommend the best model.

Electric Tankless Replacement and Upgrades in St. Louis
Older electric tankless units may struggle to keep up or show frequent error codes. We replace aging units with newer, more efficient models. Upgrades may include higher kilowatt ratings or better flow control. We check wiring and plumbing connections during replacement. A new unit can restore reliable performance.
Electric Tankless Water Heater Installation Near Me in St. Louis, MO
When you search for electric tankless water heater installation near me, our local team is ready to help. We evaluate your home and recommend the right size unit. Installations are scheduled quickly.
If you're searching for 'electric tankless water heater installation near me' in St. Louis, MO, look no further than FGV Plumbing. Our local plumbers are familiar with the area's water conditions and building standards, ensuring a custom and effective installation. We're committed to providing prompt and reliable service to our community.
FGV Plumbing at a Glance
- Licensed and insured plumbers serving St. Louis, MO
- Same-day appointments and 24/7 emergency response
- Clear written estimates, no hidden fees
- 4.9-star rated by 307+ Missouri customers
St. Louis Map
St. Louis Information
- Population
- 281,754
- Area codes
- Local
- Service area
- St. Louis and communities within 40 miles
- Nearby
- University City, Florissant, Oakville, Ballwin
Incoming water temperature and water hardness in St. Louis, MO both affect how electric tankless heaters perform, so correct sizing and installation make a real difference.
Expert Services
Trust our professionals for reliable FGV Plumbing solutions in St. Louis, MO.
Our Specialized Plumbing Services in St. Louis, MO
At FGV Plumbing, we provide a complete range of plumbing services across St. Louis, MO. 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 Electric Tankless Water Heater Installation Process Works in St. Louis, MO
We ensure a smooth and professional installation of your new electric tankless water heater from start to finish.
Request a Quote
Contact us at (816) 330-2338 to schedule a consultation. We'll discuss your hot water needs and assess your home's electrical and plumbing systems.
Site Assessment
Our plumber will visit your St. Louis home to confirm electrical capacity, water pressure and choose the best location for your new unit. We'll recommend the right electric tankless model for your household.
Professional Installation
We handle the entire installation, including any needed electrical upgrades, plumbing connections and testing. Our team makes sure your new unit is working properly and adheres to all local codes.
Frequently Asked Questions About Electric Tankless Water Heater Installation in St. Louis
The cost for electric tankless water heater installation in St. Louis, MO usually ranges from $2,500 to $6,000. This includes the unit itself, labor and any necessary electrical upgrades, which are often a significant part of the cost for electric models. Complex installations or higher-capacity units can be at the higher end of this range.
Fluctuating water temperature, error codes and reduced flow are common signs. Hard water scale is a frequent cause.
Installing an electric tankless water heater is a demanding job involving high-voltage electricity and plumbing, making it unsuitable for DIY. Incorrect installation can lead to electrical hazards, water damage and voided warranties. It's always best to hire a licensed and experienced plumber like FGV Plumbing for safe and proper installation.
FGV Plumbing installs a variety of reputable electric tankless water heater brands, including Rheem, Ecosmart, Stiebel Eltron, Bosch and Noritz. We can help you choose the best brand and model that fits your budget and hot water demands, providing a quality and efficient solution for your home.
In most areas, permits are typically required for electric tankless water heater installation, especially due to the electrical work involved. Missouri does not have a single statewide plumbing code for homes, so cities and counties adopt and enforce their own. FGV Plumbing handles all necessary permit applications in St. Louis and makes sure the installation passes all required inspections.
Most electric tankless installations require plumbing and electrical permits. We handle permits and coordinate inspections.
FGV Plumbing stands behind our work with a comprehensive labor warranty on all electric tankless water heater installations. Additionally, the units themselves come with manufacturer warranties, typically ranging from 5 to 10 years on the heat exchanger. We'll provide full details for your particular unit.
We install Stiebel Eltron, Rheem, EcoSmart and Bosch. We recommend models based on flow needs and electrical capacity.
What People Are Saying About Our Plumbing Experts?

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













