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TRUSTED BY SIMI VALLEY, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon104
    Verified water heater services reviews

Top-Rated Water heater pros in Simi Valley - Updated Nov 2026

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 Simi Valley, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Our sixteen year old water heater was leaking gas. My husband called The Water Heater Company who quoted for exactly what repairs were needed. The telephone representative who helped us requested photos of the water heater. He could tell what items were needed to bring the new water heater up to code. We were very pleased that Tony, the water heater installer, was scheduled to come the next day! Tony was punctual, thorough and answered all the questions I had. He explained everything that was done and made suggestions for other improvements we might want to have done. Everyone was very professional and very honest from beginning to end. They also use the very best water heaters with great warranties. Much higher quality than you can get at Home Depot or Lowes. We are very excited to recommend Tony and The Water Heater Company!"
Van (Side view)
TWHC Vans
TWHC Vans
TWHC Vans
TWHC Vans

+83

Response time7 hrs
Response rate92%
Recommended by84%of homeowners
Avatar for Chajon Plumbing
Chajon Plumbing
4.9(
52
)
Tankless Water Heater - RepairWater Heater - Repair or Service

Serving Simi Valley, CA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Giovanni was very professional, arrived on time, and kept in contact by phone and message about arrivals, needed equipment, and expected work. He was careful to explain what needed to be done and why and approached work with a positive attitude. The job involved replacing some valves on an exterior faucet set on copper pipes. Afterward, he noticed that the house water pressure was high and found that the regulator was not working so I had him replace that. Overall this was a very positive experience and I would say he is one of the good guys. Give him a call if you need some plumbing work done."
Before and after
Before and after
Before and after
You always have to Check for leaks
Start at the foundation to build up something

+17

Response time20 mins
Response rate95%
1 neighbors recently requested a quote
Avatar for Camarillo Rooter, LLC
Camarillo Rooter, LLC
5.0(
16
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+1 more

Serving Simi Valley, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Lonnie is an awesome plumber! When I first got my house he installed new water valves for my washer. Just recently he came to repair my water heater because it was leaking. He noticed I still had warranty on my water heater. Any other plumber probably would have charged me for a new one. I really appreciate his honesty. I would definitely recommend his services"
Recommended by78%of homeowners
Avatar for R R Electric Heating & Air
R R Electric Heating & Air
4.8(
17
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Repair+1 more

Serving Simi Valley, CA and surrounding areas

Approved

In business since 1994

Credit card accepted

Customers say: Quick response

"Hector was very knowledgeable and professional. They responded quickly to my request, gave me s bid on the spot and showed up on time when the waterheater installation began. I was pleased with the quality of the work. Highly recommended."
Response time2 hrs
12 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for 805 PLUMBING
805 PLUMBING
5.0(
23
)
Tankless Water Heater - InstallWater Heater - Install or ReplaceWater Heater - Repair or Service

Serving Simi Valley, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Alex with 805 Plumbing was quick to respond to our request for help with our septic system. He offered options for us to deal with the problem, and allowed me to watch as he diagnosed our situation with the use of a camera. I never felt pressure to take a path that would be more expensive, and every step of the way I was kept informed of what he had discovered. I am confident that our problems were efficiently taken care of, and although I would not wish septic problems on anyone I would recommend Alex and 805 Plumbing to anyone who is in need of plumbing services. Alex is a reliable, fairly priced, professional, and experienced plumber, and I will use him again in the future."
Kitchen line reroute
Kitchen reroute
Kitchen reroute
Kitchen re route
Kitchen reroute

+22

Response time4 hrs
4 neighbors recently requested a quote
Recommended by85%of homeowners
Jaxael S Rizo
5.0(
11
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+2 more

Serving Simi Valley, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"I would highly recommend this business for anyone that is looking for an honest person to fix your plumbing problems. Iâ  ve hired other plumbers in the past, and let me tell you, I have always been left disappointed. Mr. Rizo is very knowledgeable about what he does. I canâ  t thank him enough for taking care of my home!! Thank you!!"
Frizzlife Tankless Reverse Osmosis System
MOEN Flo Smart Water Monitor Automatic Shut Off
Frizzlife Tankless Reverse Osmosis System
Clients Old Shut Off Valve
Frizzlife Tankless Reverse Osmosis System

+16

Response time20 mins
Response rate100%
Recommended by90%of homeowners
Avatar for Stowell Plumbing LLC
Stowell Plumbing LLC
5.0(
11
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+1 more

Serving Simi Valley, CA and surrounding areas

Approved

In business since 2024

Emergency services offered

Credit card accepted

Stowell Plumbing is a family-owned, veteran operated plumbing company in Thousand Oaks, CA, serving Westlake Village, Simi Valley, and nearby areas. We help homeowners and small businesses with emergency plumbing, drain cleaning, hydro jetting, and main line clogs, plus water heater repair, installation and replacement, and everyday fixture repairs like toilets, faucets, showers, and garbage disposals. Whether you need urgent help or a planned upgrade, you’ll get clear communication, respectful service, and clean workmanship from licensed plumbers who do the job right

Gallery
Gallery
Gallery
13 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

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.

Every city and state will have its own set of installation codes and laws. Some won’t require you to obtain a permit before replacing your water heater, though we recommend you do, regardless of the local codes. On the other hand, some cities and states might require secondary permits for plumbing and electrical work related to the installation. Check with a local water heater installation company and local building codes to confirm which permits are required and what the specific laws are.

We recommend you turn off the unit, the power, and the water supply as soon as you notice a leak. Your water heater tank should have a dedicated shut-off valve located on the cold inlet pipes. If the valve is broken or inoperable, use the shut-off valve to your home's main water supply to stop the flow to the entire house.

Avoid touching valves or pipes directly without confirming if they are hot. Wear gloves and other safety gear to keep from coming into contact with hot levers or components when turning off your leaking water heater.

A thermocouple is a pretty simple device. It simply tells the control valve if heat is present. Most water heaters can use a universal thermocouple, provided it's the correct length. Getting one that's long enough for your appliance is crucial for success. However, some water heater models require model-specific thermocouples, which is why it's essential to take your existing one to the store to find the right match.

Heat pump water heaters, also known as hybrid water heaters, are the most efficient types of water heaters—both in terms of carbon emission and energy efficiency. This type of water heater utilizes as little as half of the energy of a traditional water heater while releasing no direct emissions. Tankless water heaters are also extremely efficient, although slightly less so than hybrid heaters.

The Simi Valley, CA homeowners’ guide to water heater services

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