Tankless Water Heater Replacement in Manchester, NH
Upgrade your water heating system with a high-efficiency tankless unit from FVR Plumbing in Manchester, NH, for long-term comfort and lower bills.
- Same-Day Replacement Available
- Code Compliant
- Fast Tankless Replacement
- Top Brands Available
Need a New Tankless Water Heater in Manchester, NH?
Our techs carry common tankless models and venting kits, so most swaps finish in a single visit.
Your Go-To for Tankless Water Heater Replacement in Manchester, NH
FVR Plumbing specializes in professional tankless water heater replacement across Manchester, NH. If your current tankless unit is past its prime, frequently breaking down, or simply not meeting your hot water demands, it might be time for an upgrade. We handle every step of removing your old unit and installing a brand new, energy-efficient model.
Our expertise includes:
- Precise sizing and installation of new tankless units.
- Expert removal and disposal of old water heaters.
- Condensing unit installs with PVC venting and condensate neutralizers

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

Customers
Why Choose FVR Plumbing for Tankless Water Heater Replacement in Manchester, NH?
Choosing the right plumbing partner for your tankless water heater replacement is crucial for long-term performance and peace of mind. We bring years of experience directly with these advanced systems.
- Increased Lifespan, Modern tankless water heaters often last much longer than conventional tank models, offering a better long-term investment.
- 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 New Hampshire utility bills.
- Space Saving, Their compact design lets tankless units fit in smaller spaces, freeing up valuable room in your utility closet or garage.
Citywide Coverage
From downtown lofts to suburban homes, our technicians are familiar with the plumbing layouts found throughout Manchester. We make sure every installation meets local codes and your standards.
Experienced Team
Each technician at FVR 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 and code compliance come first in every tankless water heater replacement we perform. Our installations follow all New Hampshire and local Manchester plumbing and gas codes, so your system runs safely and efficiently.
Trusted Certified Manchester Plumbing Services Professionals
At FVR Plumbing, we take pride in providing certified plumbing services throughout Manchester, NH. 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 long-lasting results you can trust.
Call Us Now
PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationReliable Tankless Water Heater Replacement Services in Manchester, NH
Tank to Tankless Conversions in Manchester, NH
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 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.

Commercial Tankless Water Heater Replacement in Manchester, NH
Businesses in Manchester, NH 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 skilled 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.
Commercial Tankless Replacement in Manchester
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.
Navien Tankless Water Heater Replacement in Manchester, NH
Navien tankless water heaters are popular for their condensing technology, delivering high efficiency and performance. When it is time for a Navien tankless water heater replacement in Manchester, NH, you can count on FVR 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.
Emergency Tankless Replacement in Manchester, NH
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 (844) 442-1569 any time your tankless quits.
Electric Tankless Water Heater Replacement in Manchester, NH
For properties without natural gas access or those looking for an all-electric solution, electric tankless water heaters are a viable choice. FVR Plumbing offers electric tankless water heater replacement services in Manchester, NH. This often involves careful 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 effectively, providing on-demand hot water without the need for gas lines.
Tankless vs. Tank Water Heater Conversion in Manchester, NH
Thinking about converting from a traditional tank water heater to a tankless system in your Manchester, NH 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 ensures a smooth transition, so you can enjoy the long-term benefits of a modern, efficient tankless system.

Rinnai Tankless Water Heater Replacement in Manchester
Rinnai is a leading brand in the tankless water heater market, known for its quality and engineering. If your Rinnai unit is aging or malfunctioning, FVR Plumbing provides expert Rinnai tankless water heater replacement in Manchester. We make sure your new Rinnai unit is installed correctly, maximizing its efficiency and lifespan. Our technicians are familiar with the installation requirements and venting options for Rinnai models, so the upgrade goes cleanly.
Tankless Water Heater Replacement Near Me in Manchester, NH
Looking for tankless water heater replacement near me in Manchester, NH? FVR Plumbing is your local expert, providing fast and professional service across the whole area. Our team is positioned to respond quickly to your hot water needs, with efficient service right to your doorstep.
If you are searching for tankless water heater replacement near me, you want a local plumber who understands New Hampshire water and gas codes. FVR Plumbing serves Manchester with trucks stocked for tankless installs. We can often give you a firm quote after a short phone call and a few photos.
FVR Plumbing at a Glance
- Fully licensed plumbing team covering Manchester, NH
- Same-day appointments and 24/7 emergency response
- Clear written estimates, no hidden fees
- 4.9-star rated by 840+ New Hampshire customers
Manchester Map
Manchester Information
- Population
- 115,474
- Area codes
- 603/978/351
- Service area
- Manchester and communities within 40 miles
- Nearby
- Londonderry, Derry, Nashua, Concord
Replacing an old tankless water heater in Manchester, NH is important for a reliable hot water supply, especially with changing seasonal demands and mineral content that can affect unit efficiency and lifespan.
Expert Services
Trust our professionals for reliable FVR Plumbing solutions in Manchester, NH.
Our Specialized Plumbing Services in Manchester, NH
At FVR Plumbing, we provide a complete range of plumbing services across Manchester, NH. 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 Manchester, NH
Replacing a tankless heater takes planning around gas, venting and water. Here is how we keep it simple.
Request a Quote
Call (844) 442-1569 with your current model number and a photo of the install. We give you a ballpark price and schedule a visit.
Size and Inspect
Our tech measures gas line size, meter capacity, venting path and water hardness. We recommend a unit that fits your hot water demand.
Install and Test
We remove the old heater, install the new one with service valves and venting, then test gas pressure and combustion. You get a walkthrough on settings and flushing.
Frequently Asked Questions About Tankless Water Heater Replacement in Manchester
A like-for-like gas tankless replacement typically 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.
We do not recommend it. Gas line sizing, venting clearances and combustion testing require training, and improper installs can void the warranty or create carbon monoxide hazards.
A standard tankless water heater replacement usually takes between 4 and 8 hours. This timeframe can vary based on whether we are replacing an existing tankless unit with a similar model or upgrading from a traditional tank water heater. A tank conversion can call for more extensive changes to gas lines, electrical or venting.
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.
To extend the life and efficiency of your new tankless water heater, regular maintenance is crucial, 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. FVR Plumbing offers maintenance plans to help keep your unit in top condition.
DIY tankless water heater replacement is generally not recommended due to the complexity of gas lines, high-voltage electricity, water connections and venting requirements. Improper installation can lead to serious gas leaks, carbon monoxide poisoning, water damage or electrical hazards. It is best to hire a licensed and experienced plumber like FVR 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.
With proper installation and regular maintenance, a new tankless water heater usually 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.
What People Are Saying About Our Plumbing Experts?

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













