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    Average homeowner rating
  • Verified reviews icon107
    Verified water heater services reviews

Top-Rated Water heater pros in Fullerton - Updated Nov 2026

Avatar for USA Water Heaters - Installation & Repair
USA Water Heaters - Installation & Repair
4.9(
102
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"Dennis installed a new 75 gallon water heater and circulation pump in our home. His price was very competitive and lower than several other bids we got. He communicated with us well throughout the entire process. He worked around our schedule and the installation took only a couple of hours. The new water heater is working perfectly. I highly recommend Dennis and USA Water Heaters."
Navien Tankless Water Heater Installation in IrvIne, CA
Water heater installation and repair service in Mission Viejo, Ladera Ranch, Lake Forest, Las Flores, Rancho Santa Margarita, Trabuco Canyon, Coto De Caza, Foothill Ranch, Laguna Hills, Aliso Viejo, Laguna Niguel, Laguna Woods, Laguna Beach, Dana Point, San Juan Capistrano, San Clemente, Irvine, Tustin, Santa Ana, Orange, Villa Park, Anaheim, Anaheim Hills, Brea, Yorba Linda, Newport Coast, Newport Beach, Costa Mesa, Huntington Beach, Fountain Valley, Garden Grove, Westminister, Placentia, Full
AO Smith water heater installation Laguna Niguel, CA
Navien tankless water heater installation Irvine, CA
Same-day water heater installation and repair service in Orange County, CA

+32

Response time7 hrs
Response rate100%
Recommended by93%of homeowners
Avatar for THE Water Heater Company
THE Water Heater Company
4.9(
134
)
Tankless Water Heater - InstallTankless Water Heater - RepairWater Heater - Install or Replace+1 more

Serving Fullerton, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"We had our water heater replaced by The Water Heater Company and the service was excellent from start to finish. The technician, Mike P., was professional, on time, and extremely knowledgeable. He explained everything clearly, completed the installation efficiently, and made sure the area was clean before leaving. My new water heater is working great. We really appreciate the quality of work and the attention to detail. We highly recommend The Water Heater Company especially if you want a smooth, stress-free water heater replacement done right the first time."
Van (Side view)
TWHC Vans
TWHC Vans
TWHC Vans
TWHC Vans

+83

Response time7 hrs
Response rate92%
Recommended by84%of homeowners
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Fullerton, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"I returned home from a trip and found water all over my downstairs bathroom and adjoining shed. It was late afternoon and I called Western Rooter who agreed to come out first thing the next day, I had a pretty sleepless night. Rene showed up the next day and assessed the situation and started clean up. Tony soon joined him and the two worked all day until after dark and helped me with cleanup and putting things right. They explained to me what they were doing and why along the way. I felt they charged a fair price. I am so grateful for their service and highly recommend Western Rooter."
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Cal-Tech Plumbing & Drains, Inc.
Cal-Tech Plumbing & Drains, Inc.
4.9(
39
)
Water Heater - Repair or ServiceTankless Water Heater - InstallWater Heater - Install or Replace

Serving Fullerton, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"I called Ca-Tech on a Saturday morning to check my water heater, and I was impressed that they were able to come later that morning. Albert arrived when he said he would and was very personable and very professional. He gave me a quote for a repair and also to replace my water heater. I choose to replace the water heater. When Albert returned later that week, he came on time and was very professional with the way he did the work. I liked that he kept me informed. I will definitely call Cal-Tech Pluming again."
cast iron
cast iron
main drain
clean out
clean out repair

+8

Response time12 hrs
10 neighbors recently requested a quote
Recommended by100%of homeowners
Bruce's Plumbing Service
4.8(
49
)
Tankless Water Heater - InstallTankless Water Heater - RepairWater Heater - Install or Replace+1 more

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Credit card accepted

"Noticed our water heater leaking water on Friday and contacted professionals on Angi. Bruce responded and offered a very fair price quote and was able to replace the water heater Saturday before noon. Very excellent service and highly recommended for plumbing jobs."
Response time2 hrs
Response rate99%
Recommended by76%of homeowners
Avatar for J I G Plumbing
J I G Plumbing
4.9(
98
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+1 more

Serving Fullerton, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Had a old 30 year 75 gallon leaking hot water heater. JIG Owner came out to the and assessed the problem and offered a replacement unit or upgrade to a tankless! I selected the tankless. Excellent installation, and removal of the old unit. Crew showed up on time, very professional and made sure I understood the warranty terms and conditions along with the operation of the unit. The owner followed up with a followup inspection to ensure I was happy."
Completed Install
Preparing new install
Completed Install
Completed Install
Completed Install

+8

40 neighbors recently requested a quote
Recommended by98%of homeowners
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Water Heaters FAQs, answered by experts

The standard copper wire gauge to use with any 30-amp circuit is a 10-gauge wire. The National Electric Code specifies a 10-gauge wire with appliances like water heaters running on 30 amps. If you try to use a smaller gauge wire, such as a 12 gauge, with a 30-amp breaker, you run the risk of the wire overheating and melting or causing a fire. Because of the safety hazards, the gauge of the wire is not an area to try to cut costs when connecting a 30-amp breaker to a water heater.

Gas water heaters last between eight and 12 years on average. You can help them reach their maximum lifespan with regular cleanings, maintenance, and professional checkups, though don’t hesitate to swing for a full replacement if the total cost of repairs is greater than that of purchasing and installing a new unit. 

It is very difficult and dangerous to install your own water heater, so we strongly recommend against tackling this as a DIY project. Not only will you need to wire your water heater, but you’ll also need to connect plumbing to the intake and outlet. Sweating copper pipes and connecting wiring properly are skills most DIYers don’t have, and even if you do feel confident you can do it, working with water and electricity always leaves the potential for electrocution. Hiring a local water heater installer is well worth the investment.

The average lifespan of a water heater is eight to 12 years. If your water heater is approaching its first decade of life and is giving you problems, talk to a plumber about your replacement options.

Keep in mind that certain parts of a water heater, such as the anode rod, may need replacement long before the heater itself. An anode rod often has a lifespan of three to five years.

Yes, this would be an appropriate choice. In order to comply with the National Electric Code’s rules, you'll need to install a circuit breaker that's 125% larger than the intended load. In this case, you'll multiply 30 amps by 1.25 to find the necessary breaker size. Plugging that equation in for your 30-amp water heater will leave you with a 37.6-amp breaker. If your current water heater keeps tripping the breaker, it might be time to talk to a plumber or electrician about upgrading your water heater's setup.

The Fullerton, CA homeowners’ guide to water heater services

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