Tankless Water Heater Replacement in Norwalk, CT
Switch to endless hot water with a new tankless water heater in Norwalk, CT. GLV Plumbing provides expert replacement services.
- Isolation Valves Installed Standard
- Quick Tankless Installation
- Code Compliant
- Manufacturer Warranty Registration
Professional Tankless Water Heater Replacement in Norwalk, CT.
Our team is ready to help you pick and install the best tankless unit for your home's needs.
Reliable Tankless Water Heater Replacement Services in Norwalk, CT
GLV 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 suggesting a model. That way the new heater is not starved for fuel or choked by scale.
Our expertise includes:
- Condensing unit installs with PVC venting and condensate neutralizers
- Safe gas and electric line connections for new units.
- Correct venting and condensate drainage system setup.

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

Customers
Why Choose GLV Plumbing for Tankless Water Heater Replacement in Norwalk, CT?
Choosing the right plumbing partner for your tankless water heater replacement is key for long-term performance and peace of mind. We bring years of experience specifically with these advanced systems.
- Space Saving, Their compact design lets tankless units fit in smaller spaces, freeing up useful room in your utility closet or garage.
- Increased Lifespan, Modern tankless water heaters often last twice as long as conventional tank models, offering a better long-term investment.
- Right-Sized Units, We calculate gallons per minute and temperature rise for your fixtures instead of estimating from square footage.
Citywide Coverage
We replace tankless water heaters in every neighborhood of Norwalk, 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
Each technician at GLV Plumbing knows tankless technology, so your replacement is done accurately and efficiently. We focus on details like proper gas line sizing, venting and electrical connections for top performance and safety.
Safety-First Approach
Safety is our top priority for every tankless water heater replacement. We adhere strictly to all local Connecticut plumbing and gas codes, so your new unit is installed securely and runs without risk.
Trusted Certified Norwalk Plumbing Services Professionals
At GLV Plumbing, we take pride in providing licensed, certified plumbing services throughout Norwalk, CT. 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 CertificationReliable Tankless Water Heater Replacement Services in Norwalk, CT
Exterior Mount Tankless Units in Norwalk, CT
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 break down plastic covers and wiring over time. Outdoor faucets should be shut off from inside and drained each fall, and frost-free hose bibs are a smart upgrade. 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.

Residential Tankless Water Heater Replacement in Norwalk
For homeowners in Norwalk, 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 strong 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.
Recirculation Tankless Upgrades in Norwalk, CT
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 popular in long single-story ranch homes.
Navien Tankless Water Heater Replacement in Norwalk, CT
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 Norwalk, CT, you can count on GLV Plumbing. We have broad experience with Navien's advanced systems, including their combination boiler and water heater units. Our installation process focuses on dialing in your new Navien's performance, so you benefit from its energy-saving features and reliable hot water output.
Tank to Tankless Conversions in Norwalk, CT
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.
Electric Tankless Water Heater Replacement in Norwalk, CT
For properties without natural gas access or those looking for an all-electric solution, electric tankless water heaters are a practical choice. GLV Plumbing offers electric tankless water heater replacement services in Norwalk, CT. This often involves close assessment of your home's electrical panel capacity, as these units require substantial amperage. We make sure your new electric tankless unit is installed safely and correctly, providing on-demand hot water without the need for gas lines.
Emergency Tankless Replacement in Norwalk, CT
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 usually 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 (860) 487-7330 anytime your tankless quits.

Emergency Tankless Water Heater Replacement in Norwalk
A sudden tankless water heater failure can leave your Norwalk home without hot water, which is a major inconvenience. GLV 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 minimize your downtime and get your home back to normal with reliable hot water.
Tankless Water Heater Replacement Near Me in Norwalk, CT
If you are searching for tankless water heater replacement near me, you want a local plumber who understands Connecticut water and gas codes. GLV Plumbing serves Norwalk with trucks stocked for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
Do not compromise on your home's hot water supply. For dependable tankless water heater replacement near me in Norwalk, choose GLV Plumbing. We provide upfront estimates, clear communication and expert workmanship, making your upgrade to endless hot water a simple and stress-free experience.
GLV Plumbing at a Glance
- Fully licensed plumbing team covering Norwalk, CT
- Same-day appointments and 24/7 emergency response
- Upfront, flat-rate pricing before work begins
- 4.8-star rated by 946+ Connecticut customers
Norwalk Map
Norwalk Information
- Population
- 92,458
- Area codes
- 203/475/914
- Service area
- Norwalk and communities within 40 miles
- Nearby
- Stamford, Bridgeport, Milford, Danbury
Replacing an old tankless water heater in Norwalk, CT is important for a reliable hot water supply, especially with shifting seasonal demands and mineral content that can affect unit efficiency and lifespan.
Expert Services
Trust our professionals for reliable GLV Plumbing solutions in Norwalk, CT.
Our Specialized Plumbing Services in Norwalk, CT
At GLV Plumbing, we provide a complete range of plumbing services across Norwalk, CT. 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 Norwalk, CT
Replacing a tankless heater takes planning around gas, venting and water. Here is how we keep it easy.
Request a Quote
Call GLV Plumbing today at (860) 487-7330 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 carefully remove your old unit and install the new tankless water heater. We make sure all gas, water and vent connections meet Connecticut code requirements for safety and performance.
Frequently Asked Questions About Tankless Water Heater Replacement in Norwalk
The cost for tankless water heater replacement in Norwalk, CT typically 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 always provide a detailed quote upfront after assessing your needs.
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 GLV Plumbing.
Frequent error codes, fluctuating temperature, water leaking from inside the cabinet and a unit older than 15 years are common signs. If the heat exchanger is leaking, replacement is usually the better value.
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.
Yes, in most areas of Norwalk and Connecticut, a permit is required for tankless water heater replacement, especially if it involves gas line changes or major electrical work. Our team at GLV Plumbing will handle all required permitting so your installation is fully compliant with local building codes and safety regulations.
With proper installation and regular maintenance, a new tankless water heater typically 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.
Most jurisdictions in Connecticut require a permit for water heater replacement, especially when gas piping or venting changes. We take care of permits where they are required.
Common signs that your tankless water heater needs replacement include repeated error codes, inconsistent water temperature, reduced hot water flow or a complete lack of hot water. If your unit is over 15 to 20 years old and repairs are becoming frequent and costly, replacement is often the more economical choice.
What People Are Saying About Our Plumbing Experts?

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













