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Get matched with top water heater pros in Cos Cob, CT

There are 18 highly-rated local water heater pros.

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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon39
    Verified water heater services reviews

Find Water heater pros in Cos Cob

Avatar for Roto-Rooter Plumbing & Water Cleanup

Roto-Rooter Plumbing & Water Cleanup

4.14(
171
)
Approved Pro

Roto-Rooter Plumbing & Water Cleanup

4.14(
171
)
Approved Pro
Customers say: Quick response
280 local quotes requested
90 years of experience

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025


Avatar for Sila Heating, Cooling and Plumbing

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro
Customers say: Super punctual
374 local quotes requested
36 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

Susan S on March 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

Susan S on March 2025


Astacio Plumbing & Heating

4.26(
34
)
Approved Pro

Astacio Plumbing & Heating

4.26(
34
)
Approved Pro
Customers say: Super punctual
249 local quotes requested
21 years of experience

What sets Astacio Plumbing and Heating apart from the rest of the field is the use of cutting edge technology to increase reliability, save you time and money, and improve safety on the job. Rich stays up-to-date on all the latest developments in plumbing and heating technology to determine how best to serve his customers. His trucks all carry the tools to get the job done on time and on budget, with as little disruption as possible. Astacio Plumbing and Heating has also spent years developing strong relationships with the best companies in the plumbing and heating business so that they can provide great service to you, quick delivery of replacement parts, and reasonable prices on excellent products. See website for additional service area. Additional email - [email protected].

"Dreadful experience. We had been customers of Astacio since 2015 when they installed our first tankless boiler which failed completely after 7 years and needed to be replaced in late 2022. ($10,000+) Their second one just stopped working; a dodgy board? The part is under warranty but they want almost $1,000 to replace it in the boiler; probably less than 2 hours work. I thought they used to be a good local business with ties to the community but be careful; their tankless boilers are unreliable and they'll try to rip you off when your heat goes out in the winter. So much for standing by their work. I'll never use them again."

CATHAL C on December 2024

What sets Astacio Plumbing and Heating apart from the rest of the field is the use of cutting edge technology to increase reliability, save you time and money, and improve safety on the job. Rich stays up-to-date on all the latest developments in plumbing and heating technology to determine how best to serve his customers. His trucks all carry the tools to get the job done on time and on budget, with as little disruption as possible. Astacio Plumbing and Heating has also spent years developing strong relationships with the best companies in the plumbing and heating business so that they can provide great service to you, quick delivery of replacement parts, and reasonable prices on excellent products. See website for additional service area. Additional email - [email protected].

"Dreadful experience. We had been customers of Astacio since 2015 when they installed our first tankless boiler which failed completely after 7 years and needed to be replaced in late 2022. ($10,000+) Their second one just stopped working; a dodgy board? The part is under warranty but they want almost $1,000 to replace it in the boiler; probably less than 2 hours work. I thought they used to be a good local business with ties to the community but be careful; their tankless boilers are unreliable and they'll try to rip you off when your heat goes out in the winter. So much for standing by their work. I'll never use them again."

CATHAL C on December 2024


Fine Construction Services

5.00(
7
)
Approved Pro

Fine Construction Services

5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
27 local quotes requested

Finding the right NYC residential renovation contractor can be a difficult and stressful undertaking. We at Fine Construction simplify the process of renovation, clarifying condominium and cooperative requirements, obtaining city permits as needed, and ensuring the construction is carried out in a clean and environmentally friendly manner. We work with top subcontractors and designers to coordinate all phases of the construction process—ensuring your vision becomes reality. Visit us at www.finecs.nyc to view more of what we can do to make your dreams a reality.

"I highly recommend Fine Construction Services. Ciaran and his team are detail oriented and a pleasure to work with. I look forward to working together again!"

Jonathan P on February 2021

Finding the right NYC residential renovation contractor can be a difficult and stressful undertaking. We at Fine Construction simplify the process of renovation, clarifying condominium and cooperative requirements, obtaining city permits as needed, and ensuring the construction is carried out in a clean and environmentally friendly manner. We work with top subcontractors and designers to coordinate all phases of the construction process—ensuring your vision becomes reality. Visit us at www.finecs.nyc to view more of what we can do to make your dreams a reality.

"I highly recommend Fine Construction Services. Ciaran and his team are detail oriented and a pleasure to work with. I look forward to working together again!"

Jonathan P on February 2021


Avatar for HD Renovations

HD Renovations

4.93(
94
)
Approved Pro

HD Renovations

4.93(
94
)
Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
493 local quotes requested

With my years of experience we have mastered in becoming a pro in all interior renovations and specialized in door and frame installation for interior and exterior doors. Kitchen Installation with best outcome results and detailing and bathroom remodeling. Fully licensed and insured!!!

"Dom and his crew were very professional and pleasant to deal with. Strong communication, swift responses throughout, stayed on track with deadlines, and very reliable. The work came out beautifully. I would 100% recommend and hire again for future work."

Matthew R on April 2025

With my years of experience we have mastered in becoming a pro in all interior renovations and specialized in door and frame installation for interior and exterior doors. Kitchen Installation with best outcome results and detailing and bathroom remodeling. Fully licensed and insured!!!

"Dom and his crew were very professional and pleasant to deal with. Strong communication, swift responses throughout, stayed on track with deadlines, and very reliable. The work came out beautifully. I would 100% recommend and hire again for future work."

Matthew R on April 2025


Unique plumbing LLC

5.00(
3
)
Approved Pro

Unique plumbing LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Very professional and detailed. Affordable and kind as well. Would highly recommend for the future."

Albert Z on November 2024

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Very professional and detailed. Affordable and kind as well. Would highly recommend for the future."

Albert Z on November 2024


Avatar for BHI Builder & Home Improvement LLC

BHI Builder & Home Improvement LLC

5.00(
1
)
Approved Pro

BHI Builder & Home Improvement LLC

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

Builder Home Improvement LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. 20 years of accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"They were great, quick and creative."

Gustavo X on July 2022

Builder Home Improvement LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. 20 years of accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"They were great, quick and creative."

Gustavo X on July 2022


Avatar for Sam's Rooter Service LLC

Sam's Rooter Service LLC

4.63(
12
)
Approved Pro

Sam's Rooter Service LLC

4.63(
12
)
Approved Pro
Customers say: Quick response
56 years of experience
Free onsite estimate

We pride our company on Reliability, Great Communication, Integrity, and Quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business!Test

"Did a good job , very professional"

Michael P on April 2025

We pride our company on Reliability, Great Communication, Integrity, and Quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business!Test

"Did a good job , very professional"

Michael P on April 2025


"Cayden was very professional and polite. This visit was for yearly Maintence of my sump pump. "

Bernadette H on October 2025

Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.

"Cayden was very professional and polite. This visit was for yearly Maintence of my sump pump. "

Bernadette H on October 2025


Avatar for Five Star Bath Solutions of Connecticut

Five Star Bath Solutions of Connecticut

5.00(
5
)
Approved Pro

Five Star Bath Solutions of Connecticut

5.00(
5
)
Approved Pro
104 local quotes requested
1 years of experience

Five Star Bath Solutions of is the top-of-the-line bathroom remodeling company. We've earned this title by using advanced technology, custom products, and attention to customer service. Using innovative software, Five Star Bath Solutions professionals will deliver a detailed estimate for your bathroom renovation project at an affordable price. We believe in setting standards for how projects are estimated, installed, and completed and passing that value on to you.

Five Star Bath Solutions of is the top-of-the-line bathroom remodeling company. We've earned this title by using advanced technology, custom products, and attention to customer service. Using innovative software, Five Star Bath Solutions professionals will deliver a detailed estimate for your bathroom renovation project at an affordable price. We believe in setting standards for how projects are estimated, installed, and completed and passing that value on to you.

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Water Heaters questions, answered by experts

If your gas water heater is over 20 years old, it should be replaced. Gas water heaters can last up to 12 years and while they can exceed this expectancy if well-maintained, a heater that's 20 years old would require replacement. The heater is unlikely to run as efficiently as a new model and could be more expensive to do so.

Yes, a water heater can be replaced in a day and can take between two and three hours to install from start to finish. Even if you encounter extra tasks that need to be completed, the job can still be completed in one day.

Heat pump water heaters, also known as hybrid water heaters, are the most efficient types of water heaters—both in terms of carbon emission and energy efficiency. This type of water heater utilizes as little as half of the energy of a traditional water heater while releasing no direct emissions. Tankless water heaters are also extremely efficient, although slightly less so than hybrid heaters.

While many older homes don’t need hot water heater expansion tanks, they’re necessary in most newer homes and are required by building codes. These tanks are required by code in areas where there are backflow preventers or pressure regulators on the incoming water pipe between the public water pipes and the water heater. However, tankless water heaters don’t require expansion tanks.

When wondering what size of breaker for a water heater is appropriate, the majority of hot water heaters need a 30-amp, two-pole breaker. Most residential water heaters use 240 volts and between 3,500 and 5,500 watts. If your appliance matches these measurements, a 30-amp breaker is likely perfect. Owners of point-of-use water heaters using 120 volts and between 1,500 and 3,000 watts often find that a 30-amp breaker is adequate. Water heaters that use more watts than average may need a 40-amp breaker. Smaller units that use fewer watts could potentially use a 20-amp breaker.

The Cos Cob, CT homeowners’ guide to water heater services

From average costs to expert advice, get all the answers you need to get your job done.