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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

"The Water Heater company saved the day by promptly replacing the incredibly old water heater with new Tankless solution. Their team is very professional, and the pricing was extremely competitive. I would use them again for all my water heaters needs."
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

"Ok so this man Giovanni is a rare find. Read his reviews they are real reviews. I had a problem no hot water and we had a new tankless hot water heater put in 9 months ago. So did some research and as soon as I read Giovanniâ s reviews I stopped searching. The review of the son being concerned that Giovanni was going to take advantage of his older mother is the main review that sold me. So this is what happen, I called and spoke to Giovanni around noon. He was going to squeeze me in around 2:30. He had other appointments. So around 1:30 a friend can to my house and I told her about the hot water so she said let me see. She started going into settings and with a few clicks it started working. I then sent Giovanni a text telling him what took place. He called me I told him what my friend did and walked him through the steps. He said all was good except to take off always running and put on intelligent, which I did. So now the next day I get home from work turned on hot water and just warm after 5/6 minutes of running. So thinking there was still the problem I text Giovanni and ask if he could come and look at it either today or tomorrow told him about the warm water. He then text me back saying that the intelligent needs to relearn when we use water. He also told me to turn on hot water in few different places in the home. And yes he was right the water got hot very hot. It just needs to relearn when we use hot water. I have paid this man nothing, he talk me out of having him come to my house because he doesnâ t feel there is a need for him. He told me it could take a week to learn, and if I did have problems to call him back. WHAT A GREAT GUY. I kinda hope it does break just to meet this incredible man. THANK YOU GIOVANNI. Need to update this review because I did have him come to my house for a feew liitle things. He quoted my $1,595.00 for 3 didderent fixed. The reason why I am writing this is because after he started the work he realize that one of the issue I had didn't need as much work as he first thought. He removed $400.00 from my bill. He could have said nothing because the issue was in the craw space and I would have nevered known. That is a really great guy and an incredible plumber without a doubt. Would refer him to anyone and everyone!"
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
13 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for G M C Plumbing, Inc.
G M C Plumbing, Inc.
4.9(
86
)
Water Heater - Repair or ServiceTankless Water Heater - RepairWater Heater - Install or Replace+1 more

Serving Simi Valley, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Geremi and his team are excellent, very efficient and professional. They replaced my 75 Gal water heater, installed a pressure tank, and drain pan , a shut off valve and did water pressure adjustment and obtained a city permit. He provided itemized , reasonable task cost and explained well. I will definitely recommend him."
New Drainage
Old  shower Drainage
New kitchen faucet
New Drainage
New Drainage- SEWER LINE

+3

Response time5 hrs
Response rate97%
23 neighbors recently requested a quote
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
14 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

Professional installs conclude in mere hours, with complexity differences possibly prolonging efforts slightly. Site condition often dictates the exact duration.

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.

There are many issues that can cause cold showers, but the most likely is a problem with your water heater, especially if other fixtures also don’t get hot water. If it’s just your shower not getting hot water, you likely have a broken or damaged shower cartridge. You can replace this yourself or hire a plumber to do the work for you if you’re not comfortable working with plumbing.

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

The average water heater holds between 40 and 60 gallons, but the exact amount of water that comes out during draining will depend on your unit’s capacity. The amount of time it takes to drain a water heater averages from 10 to 30 minutes.

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.