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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 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 Oak Plumbing Inc
Oak Plumbing Inc
4.6(
105
)
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

"Oak called 2nd but came next day/ UN-prepared to do either repair or water test (requested on phone) or even replace with ready new ADA toilet that the lying receptionist booker said they have “some in stock and if not he will show a catalog of choices”. Guy came punctually with Nzo tools or appliances Or knowledge of what I asked for as an “URGENT repair/replace”. See ABC review same call. Not quite as bad as them doing same since we also still have broken HVAC too, both said they would fix ( I bought gasket already, they could have put in) or replace if they brought new toilet. Problem is not in water pipes except they need testing for lead - both said they would do this too - when I asked oak re taking a sample, how long sitting in pipes? He wiped off his soda water bottle and asked “which pipes?” !!"
Response time2 days
4 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Hill's General Plumbing Services
Hill's General Plumbing Services
4.8(
21
)
Tankless Water Heater - InstallTankless Water Heater - RepairWater Heater - Install or Replace+4 more

Serving Hercules, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"This company replace my water heater, I am very satisfied with my overall experience with this company, before I agree to do the job with them staff was very friendly, professional and happy to answer all my questions, price was very fair and budget friendly, job was do very fast, very professional and clean , I recommend their services to everyone, you will not get disappointed."
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services

+5

Response time4 hrs
Response rate85%
4 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

Often, the first issue you might encounter is a lack or loss of power—this could be caused by a tripped switch or a failed heating element. If your hot water is not producing enough power and its size is not the issue, you might need to replace one of its heating elements. A leaking water heater could be caused by tank erosion.

A water heater is one of the heaviest hitters in your home, and it needs as much power as possible to help it run efficiently and effectively.

Your water heater should be on its own dedicated circuit breaker, with no other power sources running to it. This is required to meet the National Electric Code–and to ensure it runs as efficiently as possible.

Most standard residential water heaters, which are typically around 40 gallons and use 240 volts and between 3,500 and 5,500 watts, require a 30-amp, two-pole circuit breaker. For smaller, point-of-use water heaters using 120 volts and between 1,500 and 3,000 watts, a 30-amp breaker is also often adequate. However, some models may have different needs; units that use more watts than average may require a 40-amp breaker, while smaller units might only need a 20-amp breaker. Newer, tankless, or more energy-efficient models can also require a higher amperage. Having the correct breaker size is crucial for safe and efficient operation, so it's best to consult a licensed electrician to determine the specific needs of your water heater.

Any item that can hold on to moisture and encourage mold growth should be discarded and replaced following water damage. Upholstered items, such as armchairs and couches, and soft items, such as mattresses, usually must be thrown away once they've taken on a lot of water. Soft furniture is difficult to dry out, creating an inviting environment for mold.

You may also need to replace hardwood furniture following water damage if you're unable to fully dry it out. If you have appliances and electronics that have been fully submerged in water, particularly sewage, you'll need to replace those, too.

While a water heater explosion is rare, it is a serious danger. Be aware of these critical warning signs:

  • Sulfur or Rotten Egg Smell: This is a major red flag, especially for gas water heaters. It can indicate a gas leak, which could ignite and cause an explosion.

  • Leaking Pressure Valve: If the temperature and pressure (T&P) relief valve is leaking, it may not be able to properly regulate internal pressure, creating a risk of bursting.

  • Shaking or Rumbling: Loud rumbling or shaking from the tank can be a sign of extreme pressure buildup.

  • Excessive Heat: If the exterior of the water heater feels unusually hot to the touch, the unit may be overheating dangerously.

  • Rust-Colored Water: This can be a symptom of severe internal corrosion that compromises the tank's integrity.

If you notice any of these signs, especially a gas smell, you must act immediately. Shut off the gas supply to the water heater and call a professional plumber right away to prevent a potential disaster.

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.