Top-rated water heater installers and replacers.

Get matched with top water heater installers and replacers in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Water heater installers and replacers in Walnut Creek

Pedro Galvan Plumbing, Inc.
5405 Ace Ct
4.84(
16
)
Approved Pro
Pedro Galvan Plumbing, Inc.
5405 Ace Ct
4.84(
16
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

Pedro Galvan Ramirez Plumbing, Inc., is the premier plumbing contractor in the Richmond Area. We finish every job to the customer's standards. Call today for a free quote!

"Pedro is professional, patient and prompt. His skill level is top notch. I'd rehire him in a second."

Rolanda B on December 2018

Pedro Galvan Ramirez Plumbing, Inc., is the premier plumbing contractor in the Richmond Area. We finish every job to the customer's standards. Call today for a free quote!

"Pedro is professional, patient and prompt. His skill level is top notch. I'd rehire him in a second."

Rolanda B on December 2018


Avatar for Pinnacle Plumbing, Inc.
Pinnacle Plumbing, Inc.
5432 Gary Blvd, Unit 603
5.00(
10
)
Approved Pro
Pinnacle Plumbing, Inc.
5432 Gary Blvd, Unit 603
5.00(
10
)
Approved Pro
Free onsite estimate
Emergency services offered

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Camilo quickly responded to my request. He helped me with my rental property issues while I was out of the country. Very reliable, efficient and did not overcharge. Tenants were happy as well. I’ll use Pinnacle Plumbing again. Thanks again."

Alan H on June 2025

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Camilo quickly responded to my request. He helped me with my rental property issues while I was out of the country. Very reliable, efficient and did not overcharge. Tenants were happy as well. I’ll use Pinnacle Plumbing again. Thanks again."

Alan H on June 2025


Avatar for R Plumbing Companies, Inc.
R Plumbing Companies, Inc.
202 Kingswood Ave
5.00(
3
)
Approved Pro
R Plumbing Companies, Inc.
202 Kingswood Ave
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

We are 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. 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 baasis of our business

"Helped me right away. Did not have to wait all day."

Julie H on September 2023

We are 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. 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 baasis of our business

"Helped me right away. Did not have to wait all day."

Julie H on September 2023


Avatar for Prime Time Plumbing
Prime Time Plumbing
1804 Hoke Ct
5.00(
3
)
Approved Pro
Prime Time Plumbing
1804 Hoke Ct
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 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!

"I had a great experience with them. They did a tankless water heater for a fair price and helped install new water lines for my espresso machine in my cafe. Would recommend to anyone who needs the job done right!"

Alex H on October 2023

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!

"I had a great experience with them. They did a tankless water heater for a fair price and helped install new water lines for my espresso machine in my cafe. Would recommend to anyone who needs the job done right!"

Alex H on October 2023


Avatar for Oak Plumbing
Oak Plumbing
3852 Industrial Way
4.63(
467
)
Approved Pro
Oak Plumbing
3852 Industrial Way
4.63(
467
)
Approved Pro
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
31 local quotes requested

Oak Plumbing 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. 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. Our customer's safety is extremely important, which is why all of our technicians are fully trained, background checked, and drug tested.

"Malik was very punctual, polite and went into detail about the work, what it will require and estimate time on how long the job will take. I am happy with the work and for sure hired Oak Plumbing for any future work, highly recommended them."

Marco G on April 2025

Oak Plumbing 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. 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. Our customer's safety is extremely important, which is why all of our technicians are fully trained, background checked, and drug tested.

"Malik was very punctual, polite and went into detail about the work, what it will require and estimate time on how long the job will take. I am happy with the work and for sure hired Oak Plumbing for any future work, highly recommended them."

Marco G on April 2025


Avatar for Rockford Plumbing, LLC
Rockford Plumbing, LLC
3859 Rockford Dr
4.96(
12
)
Approved Pro
Rockford Plumbing, LLC
3859 Rockford Dr
4.96(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today! (510) 942-5242

"Awesome"

Julius D on May 2025

I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today! (510) 942-5242

"Awesome"

Julius D on May 2025


Avatar for Albert Nahman Plumbing, Heating and Cooling
Albert Nahman Plumbing, Heating and Cooling
3333 Martin Luther King Jr. Way
3.94(
62
)
Approved Pro
Albert Nahman Plumbing, Heating and Cooling
3333 Martin Luther King Jr. Way
3.94(
62
)
Approved Pro
Customers say: True professional
21 local quotes requested
44 years of experience

Albert Nahman Plumbing, Heating, and Cooling is a full service plumbing company dedicated to delivering exceptional service and warranties to the homeowner, apartment manager or building professional. We employ advanced diagnostic tools to solve your plumbing problems quickly and accurately. Our range of services include expert repairs to existing plumbing water, gas and sewage systems, copper piping, water main replacements, trenchless sewer replacements and tank or tankless water heater installations. We have been an early supporter of energy saving products such as tankless water heaters and are locally known as the tankless water heater specialist having installed and serviced all models of tankless water heaters for more than twenty years. We also have expertise in renovating existing kitchens, baths or laundries to help make your design dreams a reality or to simply upgrade your fixtures with high efficiency products.

"They came to fix a valve, busted a pipe and charged us $4500. We still don't have water 24 hours later and were just told they could fix the problem for an additional $16,000. These people are unscrupulous and do not care about the customer . We were told by another plumber that it would cost us $6000 to fix the issue. If you like to be overcharged and treated like shit, this is the company for you."

Rob C on May 2025

Albert Nahman Plumbing, Heating, and Cooling is a full service plumbing company dedicated to delivering exceptional service and warranties to the homeowner, apartment manager or building professional. We employ advanced diagnostic tools to solve your plumbing problems quickly and accurately. Our range of services include expert repairs to existing plumbing water, gas and sewage systems, copper piping, water main replacements, trenchless sewer replacements and tank or tankless water heater installations. We have been an early supporter of energy saving products such as tankless water heaters and are locally known as the tankless water heater specialist having installed and serviced all models of tankless water heaters for more than twenty years. We also have expertise in renovating existing kitchens, baths or laundries to help make your design dreams a reality or to simply upgrade your fixtures with high efficiency products.

"They came to fix a valve, busted a pipe and charged us $4500. We still don't have water 24 hours later and were just told they could fix the problem for an additional $16,000. These people are unscrupulous and do not care about the customer . We were told by another plumber that it would cost us $6000 to fix the issue. If you like to be overcharged and treated like shit, this is the company for you."

Rob C on May 2025


Avatar for Discover Plumbing and Rooter, Inc.
Discover Plumbing and Rooter, Inc.
1728 Ocean Avenue #245
4.94(
8
)
Approved Pro
Discover Plumbing and Rooter, Inc.
1728 Ocean Avenue #245
4.94(
8
)
Approved Pro
Customers say: Quick response
18 local quotes requested
8 years of experience

a

"The technique was very professional and courteous and knew what was the problem and solved it. We are very happy with the gentleman"

Mary M on May 2024

a

"The technique was very professional and courteous and knew what was the problem and solved it. We are very happy with the gentleman"

Mary M on May 2024


In Demand Plumbing
729 Fulton Shipyard Road Suite A1
4.94(
46
)
Approved Pro
In Demand Plumbing
729 Fulton Shipyard Road Suite A1
4.94(
46
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
23 local quotes requested

Highest rated plumber Antioch CA. We can help with your water heater installation or repairs. We offer quality work, in a very professional manner, at a fair price. We take pride in our work and strive for perfection. We work on faucets, toilets, shower valves, water leaks, gas leaks, clogged sewer lines drain repair. We service Antioch, Brentwood, Oakley, Pittsburg and surrounding areas. Give

"Experienced technicians who take pride in their work."

Rex D on May 2023

Highest rated plumber Antioch CA. We can help with your water heater installation or repairs. We offer quality work, in a very professional manner, at a fair price. We take pride in our work and strive for perfection. We work on faucets, toilets, shower valves, water leaks, gas leaks, clogged sewer lines drain repair. We service Antioch, Brentwood, Oakley, Pittsburg and surrounding areas. Give

"Experienced technicians who take pride in their work."

Rex D on May 2023


EMERGENCY ROOTER & PLUMBING
44279 Fremont Blvd Suite N
4.62(
13
)
Approved Pro
EMERGENCY ROOTER & PLUMBING
44279 Fremont Blvd Suite N
4.62(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
34 local quotes requested

EMERGENCY ROOTER & PLUMBING 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. 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.

"Good job done but prices were exorbitantly high"

Vinita K on October 2023

EMERGENCY ROOTER & PLUMBING 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. 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.

"Good job done but prices were exorbitantly high"

Vinita K on October 2023

...
Showing 1-10 of 974

FAQs for water heater installation and replacement projects in Walnut Creek, CA

You'll need an expansion tank if your home has a closed water system, which is standard in newer homes or those with backflow preventers or pressure regulators. Expanding hot water has nowhere to go in closed systems, creating potentially damaging pressure. The expansion tank provides space for this expanded water, protecting your plumbing system and water heater from premature failure. Many local building codes now require expansion tanks, and some water heater warranties may be voided without one.

For a standard 50-gallon water heater, a two-gallon expansion tank is sufficient. This sizing assumes normal household water pressure between 40 and 60 psi. If your home has higher water pressure (60 to 80 psi), consider upgrading to a slightly larger tank for added protection. The expansion tank's purpose is to accommodate the increased volume that occurs when cold water heats up, which is proportional to your water heater's capacity.

Watch for signs like dripping water around the tank, fluctuating water pressure throughout your home, or unusual noises in your plumbing system. A properly functioning expansion tank should feel light when tapped on the bottom—if it feels heavy or waterlogged, the internal bladder has likely failed. Other indicators include frequent triggering of your temperature and pressure relief valve, visible corrosion on the tank, or unexplained increases in your water bill, suggesting hidden leaks.

Most expansion tanks have a service life of five to 10 years, though some may last up to 12 years or more with proper maintenance. Factors affecting lifespan include water quality, system pressure, installation quality, and tank construction. Hard water areas often see shorter lifespans due to mineral buildup. Regular maintenance checks can help identify potential issues before complete failure. When your water heater is due for replacement, it's wise to replace the expansion tank simultaneously, even if it hasn't failed yet.

A 30-gallon water heater needs an expansion tank if your home has a closed plumbing system. The need for an expansion tank is determined by your plumbing system type rather than water heater size. Even smaller water heaters create thermal expansion when heating water. If your home has a backflow preventer, pressure regulator, or check valve on the main water line, you have a closed system that requires an expansion tank. Check your local plumbing codes, as many jurisdictions now mandate expansion tanks regardless of water heater size.

The Walnut Creek, CA homeowners’ guide to water heater installations and replacements
From average costs to expert advice, get all the answers you need to get your job done.
Ceramic sink and modern tap in stylish kitchen
Jul 9, 2025
Jul 9, 2025
Need to clean your drain? Here’s how much it costs, what factors affect cost, and what to expect.
Plumber repairing water heater in the bathroom
Jun 25, 2025
Jun 25, 2025
Budget for water heater flush costs based on factors such as water heater size and type, the plumber’s experience level, related services, and more.
trench being dug to repair sewer main in backyard
Jun 21, 2025
Jun 21, 2025
Use this guide to budget for sewer line replacement costs based on factors such as location, trenching, materials, repairs, landscaping, and more.
newly remodeled bathroom with new bath tub
Jun 21, 2025
Jun 21, 2025
Budget for bathtub replacement costs based on factors such as bathtub type, material, removal, hardware, labor, plumbing work, and more.
A man installs a new shower
Jun 15, 2025
Jun 15, 2025
Looking to remodel your shower? Here’s how much it costs, what factors affect cost, and what to expect.
plumber cleaning a home sewer line in yard
Jun 15, 2025
Jun 15, 2025
Budget for main sewer line clog repair costs based on factors such as cleaning method, sewer age, project complexity, permits, labor, and more.
Share project details to get started.