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Water heater installers and replacers in Gilroy

Avatar for Chandler's Plumbing
Chandler's Plumbing
2230 Will Wool Dr
4.52(
612
)
Approved Pro
Chandler's Plumbing
2230 Will Wool Dr
4.52(
612
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
623 local quotes requested

We are the Home renovation of Santa Clara County offering free estimates, fair rates, and superior workmanship. Our team has been servicing the Bay Area for over 15 years. Our company is licensed, bonded, and insured. Our specialists are equipped, experienced, and provides a full range of services. We guarantee our work and can beat any quote by 10%. Give us a call today! Licensed - Bonded - Insured Family Owned Business

"Put in a beautiful faucet. Thank you!"

David O on May 2025

We are the Home renovation of Santa Clara County offering free estimates, fair rates, and superior workmanship. Our team has been servicing the Bay Area for over 15 years. Our company is licensed, bonded, and insured. Our specialists are equipped, experienced, and provides a full range of services. We guarantee our work and can beat any quote by 10%. Give us a call today! Licensed - Bonded - Insured Family Owned Business

"Put in a beautiful faucet. Thank you!"

David O on May 2025


Avatar for Better Water Heaters, Inc.
Better Water Heaters, Inc.
3010 Ridgegate Dr
4.59(
324
)
Approved Pro
Better Water Heaters, Inc.
3010 Ridgegate Dr
4.59(
324
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
24 local quotes requested

Better Water Heaters is an owner-operated company, and we have been in business serving our customer�s water heater needs since 2002. We are very familiar with all facets of hot water heaters, and we take a lot of pride in our work. Better Water Heaters is able to provide our customers with top-of-the-line service by using quality materials and implementing our high standards. We are looking forward to earning your business! Call owner Frans Cartwright today for all your water heater needs.

"Quick turnaround!"

Gary J on December 2024

Better Water Heaters is an owner-operated company, and we have been in business serving our customer�s water heater needs since 2002. We are very familiar with all facets of hot water heaters, and we take a lot of pride in our work. Better Water Heaters is able to provide our customers with top-of-the-line service by using quality materials and implementing our high standards. We are looking forward to earning your business! Call owner Frans Cartwright today for all your water heater needs.

"Quick turnaround!"

Gary J on December 2024


Avatar for The Tankless Guys Plumbing Corp.
The Tankless Guys Plumbing Corp.
903 Tamarack Ln Unit B
5.00(
12
)
Approved Pro
The Tankless Guys Plumbing Corp.
903 Tamarack Ln Unit B
5.00(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
63 local quotes requested

At THE TANKLESS GUYS PLUMBING CORP 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!

"They were prompt and fantastic"

Blaine O on January 2025

At THE TANKLESS GUYS PLUMBING CORP 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!

"They were prompt and fantastic"

Blaine O on January 2025


Avatar for Drain Doctor, Inc.
Drain Doctor, Inc.
1277 N. 15th Street
4.55(
11
)
Approved Pro
Drain Doctor, Inc.
1277 N. 15th Street
4.55(
11
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
33 years of experience

We are a locally owned and operated pumbing company based out of Santa Clara that values honesty and integrity and treats your home as if it were our own. We have over a decade of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! Call us for 24 hour emergency service!

"I felt comfortable and at peace which is hard during stressful times"

Dinorah G on August 2023

We are a locally owned and operated pumbing company based out of Santa Clara that values honesty and integrity and treats your home as if it were our own. We have over a decade of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! Call us for 24 hour emergency service!

"I felt comfortable and at peace which is hard during stressful times"

Dinorah G on August 2023


Avatar for Escobar Custom Plumbing, Inc.
Escobar Custom Plumbing, Inc.
71 Railroad Ave
5.00(
7
)
Approved Pro
Escobar Custom Plumbing, Inc.
71 Railroad Ave
5.00(
7
)
Approved Pro
21 local quotes requested
1 years of experience

Escobar Custom Plumbing Corp 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.

"Fast (even offered to come on the weekend), friendly, competent and resolved the issue. Highly recommend!"

Markus M on June 2025

Escobar Custom Plumbing Corp 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.

"Fast (even offered to come on the weekend), friendly, competent and resolved the issue. Highly recommend!"

Markus M on June 2025


Avatar for DAE Plumbing, Inc.
DAE Plumbing, Inc.
880 El Toro Drive
5.00(
7
)
Approved Pro
DAE Plumbing, Inc.
880 El Toro Drive
5.00(
7
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

With over 15 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We handle everything from drain clogs to Solar Water Heating Systems. We will treat your home as we would treat our own. Give DAE Plumbing, Inc., a call today, we look forward to working with you!

"Daniel was very prompt, courteous, knowledgeable, and accomodating to me. Fast work too. I will definitely use him again and would definitely recommend him!"

Christy S on August 2019

With over 15 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We handle everything from drain clogs to Solar Water Heating Systems. We will treat your home as we would treat our own. Give DAE Plumbing, Inc., a call today, we look forward to working with you!

"Daniel was very prompt, courteous, knowledgeable, and accomodating to me. Fast work too. I will definitely use him again and would definitely recommend him!"

Christy S on August 2019


Avatar for RYL Plumbing Corp
RYL Plumbing Corp
441 HILLSDALE DR
5.00(
6
)
Approved Pro
RYL Plumbing Corp
441 HILLSDALE DR
5.00(
6
)
Approved Pro
Customers say: Quick response
Free onsite estimate

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

"Had to have assistance with a job, and they were able to come the same day, which was so helpful to us. Do not hesitate book them now."

Gina B on June 2025

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

"Had to have assistance with a job, and they were able to come the same day, which was so helpful to us. Do not hesitate book them now."

Gina B on June 2025


Avatar for Avila Plumbing And Heating Services
Avila Plumbing And Heating Services
651 MONTE CARLO DR
4.96(
26
)
Approved Pro
Avila Plumbing And Heating Services
651 MONTE CARLO DR
4.96(
26
)
Approved Pro
Customers say: Quality work
19 local quotes requested
7 years of experience

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

"Fasr and very professional."

TAMMY V on March 2025

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

"Fasr and very professional."

TAMMY V on March 2025


Avatar for AAA Mike Counsil Plumbing and Rooter
AAA Mike Counsil Plumbing and Rooter
1915 O Toole Way
4.05(
309
)
Approved Pro
AAA Mike Counsil Plumbing and Rooter
1915 O Toole Way
4.05(
309
)
Approved Pro
Customers say: Quality work
1212 local quotes requested
31 years of experience

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025


Avatar for RO Appliance Repair Co
RO Appliance Repair Co
1177 Branham Ln
4.70(
128
)
Approved Pro
RO Appliance Repair Co
1177 Branham Ln
4.70(
128
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
266 local quotes requested

Epa and NASTeC Certified, Service Specialist. RO Appliance is owned and operated with the upmost respect and professionalism, by certified, knowledgeable and honest technicians, covering south of the Bay Area.

"We had to get our Cooking range hood serviced that had just stopped working. NEXT HVAC promptly scheduled John T to come the same day. We were also updated about the schedule and ETA proactively. John was on time, kind and very knowledgeable. He diagnosed and fixed the problem in about 30-45 minutes. Great professional service!"

Brian T on August 2024

Epa and NASTeC Certified, Service Specialist. RO Appliance is owned and operated with the upmost respect and professionalism, by certified, knowledgeable and honest technicians, covering south of the Bay Area.

"We had to get our Cooking range hood serviced that had just stopped working. NEXT HVAC promptly scheduled John T to come the same day. We were also updated about the schedule and ETA proactively. John was on time, kind and very knowledgeable. He diagnosed and fixed the problem in about 30-45 minutes. Great professional service!"

Brian T on August 2024

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FAQs for water heater installation and replacement projects in Gilroy, 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 Gilroy, CA homeowners’ guide to water heater installations and replacements
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