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TRUSTED BY HERCULES, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon67
    Verified water heater services reviews

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

Avatar for Water Heaters Masters
Water Heaters Masters
4.9(
112
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Hercules, 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
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+20

Response time9 hrs
Recommended by94%of homeowners
Avatar for Cali Water Heater & HVAC
Cali Water Heater & HVAC
4.8(
32
)
Water Heater - Install or ReplaceTankless Water Heater - InstallWater Heater - Repair or Service - For Business+2 more

Serving Hercules, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Small jobs welcome

"I got home from work and discovered that my water heater had a major leak that required shutting off the water to the house. Carl at Cali Water Heater responded immediately and less than 24 hours later I had a new water heater installed, water restored, and all at a fair price. Highly recommend!"
Response time6 hrs
Response rate94%
53 neighbors recently requested a quote
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
722
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Hercules, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"The cost to replace three natural gas wall heater was slightly less than Gree mini-splits heater cooler. The installers were courteous and professional. Delayed several days as the equipment haven’t arrived yet. Job cost as agreed, but took half day longer due to the complexity of installation. Results are excellent. The mini-split units works as specified. Will use Albert Nahman heating plumbing again in the future."
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate100%
44 neighbors recently requested a quote
Avatar for H K & S Plumbing Co.
H K & S Plumbing Co.
4.3(
96
)
Water Heater - Install or ReplaceTankless Water Heater - InstallWater Heater - Repair or Service+5 more

Serving Hercules, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"I highly recommend this company!!! He responded within minutes of my searching for a plumber. He came the next day and installed a new tankless water heater. He also found a faulty electrical outlet and repaired it as well. Quality workmanship. I will keep his number. His name was Harry."
H K & S Plumbing Co.
Response time11 hrs
27 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for Oak Plumbing Inc
Oak Plumbing Inc
4.6(
101
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Hercules, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"Jared showed up and wasted no time in doing two things at once (draining the hot water heater and repairing a small fireplace gas leak). He educated me a little on what he was doing which is always helpful. He was also careful to keep his booties on, so as not to ruin the shiny wood floors. Highly recommend based on this experience."
Response time2 days
5 neighbors recently requested a quote
Recommended by85%of homeowners
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Water Heaters FAQs, answered by experts

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

Excessive pressure (above 80 psi) puts too much stress on plumbing pipes, joints, and fixtures. This can lead to leaks and burst pipes. Plus, it shortens the lifespan of appliances, can waste water, and can raise your utility bills. High water pressure might feel like a gift, but it’s actually a silent threat to plumbing.

Price variations arise from size, type (tankless or tank), efficiency grades, and installation complexity, including labor and materials.

On average, a tankless water heater should last between 10 and 15 years. Its lifespan will be affected by how much it's used, the effect of weather where your home is on the unit—colder is harsher and will shorten lifespan—and if the heater is maintained appropriately and regularly. There are many signs your water heater needs to be replaced, so pay attention to anything that changes with your heater or hot water.

Your water heater's age can affect your homeowners' insurance policy. Many policies will ask how old the heater is when you first apply for a policy—and they may make you replace a model that's over 10 years old. 

Even if your policy permits you to have an older heater, it may significantly reduce the amount of protection available. If an older water heater suddenly leaks and causes damage to parts of your home, your policy may not cover it.

The Hercules, CA homeowners’ guide to water heater services

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