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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon91
    Verified water heater services reviews

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

Avatar for Water Heater Boys, LLC
Water Heater Boys, LLC
5.0(
21
)
Tankless Water Heater - InstallWater Heater - Install or Replace

Serving Atherton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Warranties offered

"My tankless water heater went out on a Friday night, and the Water Heater Boys were able to replace it on Saturday the next day! Excellent customer service and professionalism. Will definitely call if in this situation again, and will tell my friends!"
Tankless Install
75gal Bradford White
Response time2 hrs
Response rate100%
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 Atherton, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"The first visit lead to cleaning the area around the heater and burners and checking the thermocouple. Sadly that seemed to make it worse. Less than a week later No hot water for over 30 hours till the second technician replaced the thermocouple. All is perfect now. No charge for the second visit. The next step, if needed will be a tankless and their quote looks a bit steep. But I am really hoping I won’t need to go that far."
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 Durrani Plumbing
Durrani Plumbing
4.9(
15
)
Water Heater - Install or ReplaceWater Heater - Repair or Service

Serving Atherton, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Sarfraz was the first to respond to my request. He gave me a quote for what I was requesting, and we were able to schedule an appointment the following day. He was very friendly and also gave me helpful advice on maintaining my water heater, as well as which signs to look out for in the future, in order to prevent any problems or issues. I will definitely keep Durrani in my contacts for future business."
American Standard Faucet
Insinkerator Garbage Disposal
Bradford White Water Heater
Bradford White Water Heater
75 Gallon Water Heaters

+9

Response time3 hrs
Response rate96%
Recommended by100%of homeowners
Avatar for In & Out Plumbing & Construction Inc
In & Out Plumbing & Construction Inc
4.2(
79
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Atherton, CA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"In & Out is fast and professional.   They bid our job in the morning, and were back that afternoon with new toilet tank flushing devices and had all four of them installed in our bathroom the same day.   They took away the old parts and the boxes the new parts came in.   They are knowledgeable, punctual and tidy.   Should we have any plumbing problems, I would call them right away!"
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line

+27

Response time1 day
Response rate99%
11 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

Yes, a water heater can be replaced in a day and can take between two and three hours to install from start to finish. Even if you encounter extra tasks that need to be completed, the job can still be completed in one day.

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.

Water expands when heated and also when freezing. When water is heated, it expands by around 4%. For a full water heater, this is one of the main reasons malfunctions occur—the hot water has nowhere else to go but out. Due to the constant expansion and reduction in volume, it’s recommended (required in most places) that an expansion tank be installed.

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.

Electric water heaters do not need an attached vent, but the location of the water heater should allow for roughly 12 inches of clearance around it. This allows cool air to flow around the appliance and allows repair technicians to work on its components safely. The exact amount of clearance space required depends on your local building codes.

The Atherton, CA homeowners’ guide to water heater services

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