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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon58
    Verified water heater services reviews

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

Avatar for Water Heaters Masters
Water Heaters Masters
4.9(
110
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Gilroy, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Water Heater Masters were top-notch! I called on a Saturday afternoon - they were available 9am Sunday morning to come and inspect and quote. They only had one guy working that day, but scheduled me for Monday morning between 8 and 9. At 8:15am I got a call with an ETA of 8:45, which was a really nice touch! Despite telling me it would take an entire day to install, they were done by 1pm. They also found some creative ways to do the install to avoid drilling through my stucco (for the exhaust vent and for the condensate run-off). Very professional and clean-looking install. These guys may not always be the cheapest around, and they recommended a top-of-the-line heater (which is what I really wanted anyway), but I'd much rather pay a little extra for that level of service and support. Thank you!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time9 hrs
Recommended by95%of homeowners
Avatar for DAE Plumbing, Inc.
DAE Plumbing, Inc.
5.0(
7
)
Water Heater - Install or ReplaceWater Heater - Install or Replace - For Business

Serving Gilroy, CA and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Dan arrived when he said he would installed my water heater as agreed and hauled off the old one. He was pleasant and thorough. I will be calling him again soon as I have another challenge that I believe he will be able to help me with. Thanks Dan"
3" Gas Line to Apartment Complex
Solar Water Heating System
Solar Water Heating System
New 4" Sewer Main connection
Side by Side Lav Sink

+9

Response time3 hrs
Response rate91%
Recommended by100%of homeowners
Avatar for Fantastic Rooter, Inc.
Fantastic Rooter, Inc.
4.5(
174
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Gilroy, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"We hired Fantastic Rooter to re-pipe my mother-in-law's house. They did a fantastic job - even the city inspector was praising Gerardo and his crew for their work. She also needed a new water heater and sink, and those were reasonable priced. The guy that replaced the sheetrock did a great job. You can't even tell the walls were ever cut into, he made them so smooth again. And they cleaned up well, too. I highly recommend them!"
Outdoor Tankless w H
Before a Tankless install
After a Tankless install
Indoor Tankless & Repipe
Indoor Tankless W H

+1

Response time2 days
Recommended by96%of homeowners
Avatar for Chandler's Plumbing
Chandler's Plumbing
4.3(
746
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+5 more

Serving Gilroy, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Emergency services offered

"We had a water heater break down during the holiday break. Chandler and his crew were able to respond and replace the water heater asap. Chandler explained that we had a large capacity water heater - 75 gallons and it would be more expensive, but we found their quote was very reasonable. They came and replaced the water heater and were very professional. I would highly recommend them and would gladly use them again. Thank you Chandler for such prompt service and great work!"
Sewer Line Camera Inspection
Shut-Off Valve Repair
Main Water Line Replacment
Water Heater Installation
Tankless Water Heater Installation

+310

Response time4 hrs
279 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Jess Plumbing
Jess Plumbing
4.9(
50
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Gilroy, CA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"As a property manager I have doubt was many plumbing companies and I can say I can count on Jess plumbing. He is efficient, reliable and always has fair prices. You can count on him not to overprice because he's honest and knows what he's doing."
Plumbing Project
Plumbing Project
Plumbing Project /water main
Old gate valve/ doesn’t shut off water
Installed new Zoeller sewer tank lid

+178

Response time1 day
Response rate100%
Recommended by93%of homeowners
Avatar for Mike Counsil Plumbing and Rooter
Mike Counsil Plumbing and Rooter
4.0(
331
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Gilroy, CA and surrounding areas

Approved (Corporate)

In business since 1994

Emergency services offered

Warranties offered

"Let me start off by saying I will definitely call Mike Counsil Plumbing and Rooter for my future plumbing needs!! I woke up to water in my bedroom closet from a leak coming from my water heater. I called Mike Counsil Plumbing and Rooter, I spoke with Deanna in the office and she was so patient and knowledgeable. She was able to get me an appointment same day. Their technician Abel came out and was able to advise me of what needed to be done. Lets say I have a new water heater and i'm very pleased. Very Grateful, Debra Torres-Sanchez"
Preparing a safe environment for working on a sewer line replacement.
Water heater installation with expansion tank
Additional Photos
Additional Photos
Additional Photos

+28

Response time8 hrs
Response rate100%
Recommended by81%of homeowners
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Water Heaters FAQs, answered by experts

The size needed for your expansion tank is determined by the size of your home's water heater. Expansion tanks are available in 2-gallon and 4.5-gallon sizes. A 2-gallon tank will be appropriate for water heaters up to 50 gallons. An adequately sized tank should have a volume that equals 2% to 5% of the water volume within the system. A plumber can evaluate your home's water pressure, water heater size, and other factors to provide suggestions for picking out the best expansion tank.

Yes, you can convert a gas water heater to an electric one, but it is a complex process. You will need to ensure there is adequate power for the new electric unit, as they require more power than gas models. The project also involves safely closing off the gas lines and ventilation, and some cities may require a permit for the conversion. The cost can range from $1,500 to $4,100, depending on the installation scope, plumbing and electrical work, and the water heater model. For an accurate quote, it's best to contact a local professional. Also, be aware that your monthly utility bills may increase after the conversion, as natural gas is typically cheaper than electricity.

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.

Flushing biannually, checking the anode rod, and temperature settings maximize equipment lifespan while reducing surprise costs.

The good news is that most home warranty plans cover hot water heaters, regardless of whether you have a tank or a tankless model. Your hot water heater should be covered by your home warranty because it's considered an essential home appliance.

The Gilroy, CA homeowners’ guide to water heater services

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