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TRUSTED BY WASHINGTON, UT HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon24
    Verified water heater services reviews

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

Avatar for Marlin Plumbing Services
Marlin Plumbing Services
4.9(
128
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Install - For Business+1 more

Serving Washington, UT and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"After expert advice from Marlin Plumbing, we did not get a tankless water heater. Our failed water heater was still under warranty, and we took their recommendation to have a new one put in along with a larger water softener. We were very happy with their prompt, reliable service. This should prevent our hot water heater from rusting prematurely. Also learned how to clean out the aeration filter on faucets -- sediment collects there! Very informative and helpful."
Steve
Water Heater and Softener
Range Hood
3 Ton gas furnace
4 Ton gas furnace

+1

Response time6 hrs
Response rate97%
9 neighbors recently requested a quote
Avatar for Mr. Rooter Plumbing of St. George
Mr. Rooter Plumbing of St. George
4.5(
164
)
Tankless Water Heater - RepairWater Heater - Install or ReplaceTankless Water Heater - Install+5 more

Serving Washington, UT and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Water heater failed on a Sunday. Called Rooter just after lunch and they said they would be at my home by 4:30 to give me an estimate. Their technician got here at 4:00 and I had a new unit installed by 7:30 pm. Great work, great Technician!"
Thank You
Mr Rooter Plumbing
Our Angi Page
Camera Main line
Broken sewer line

+9

12 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Whipple Cooling, Heating, Plumbing & Electrical
Whipple Cooling, Heating, Plumbing & Electrical
3.9(
225
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+3 more

Serving Washington, UT and surrounding areas

Approved (Corporate)

In business since 1947

Free estimates

Emergency services offered

Since 1947, Whipple Service Champions have kept water moving the right direction in Southern Utah homes. Drain cleaning, leak detection, water heater repair and replacement, repiping, fixture installation, and water treatment across Washington County — where hard water is the rule, not the exception.\n\nEvery job is handled by licensed, insured Service Champions committed to 200 hours of annual training. We show up on time, explain what's wrong in plain language, and give you the price before the work starts — no surprises, no pressure. Because when it comes to your comfort, second place isn't an option.\n\nWhipple is on the way. Let's get your home to gold.\n\nWhipple also handles HVAC and electrical for St. George homeowners.

Our Work
Our Work
Our Work
Our Work
Our Team

+6

22 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Southern Utah HVAC & Plumbing Group LLC
Southern Utah HVAC & Plumbing Group LLC
5.0(
7
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+1 more

Serving Washington, UT and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Nolan is an Amazing dude! Always super helpful when I call and have questions. Very honest and professional, if you hire anyone else you are making a huge mistake. As a business owner myself it’s hard to find reliable and honest people these days, these guys won’t disappoint!!!!"
Checking Depth
Mini Ex Trenching
AC Condenser
Attic Furnace
Kitchen Sink Install

+6

6 neighbors recently requested a quote
Avatar for Walker Plumbing, Heating Air
Walker Plumbing, Heating Air
5.0(
5
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+1 more

Serving Washington, UT and surrounding areas

Approved (Corporate)

In business since 2002

Credit card accepted

Founded in 2002 by Master Plumber Brett Walker, Walker Plumbing, Heating & Air is a family-owned and operated company that has been proudly serving St. George and Southern Utah for over 20 years. Brett and his fully licensed team of master plumbers and HVAC technicians are dedicated to delivering top quality workmanship and a great customer experience, with a full fleet of trucks and technicians available 24/7 for any plumbing or indoor comfort issue. From the moment you call, you can expect clear communication, prompt arrival, fast turnarounds, and personalized solutions tailored to your needs and budget. Every technician is licensed, insured, and background checked, and our no-upselling policy means you'll always receive honest, transparent service without pressure. Walker Plumbing, Heating & Air is the go-to home services company for your friends and neighbors in Southern Utah, and we'd love to show you why. \n

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

A tankless water heater can last up to 20 years, which is nearly double the lifespan of a conventional tank heater. However, their longevity is highly dependent on several factors. With proper installation and regular maintenance, such as descaling to prevent mineral buildup from hard water, you can expect a lifespan of 15 to 20 years. Without proper care, a tankless unit may begin to fail in as little as 12 years. Other factors that affect its lifespan include household usage and the quality of the local water supply. While they have a higher upfront cost, their energy savings, smaller size, and longer life make them a worthwhile investment for many homeowners.

The time it takes to install or replace a water heater depends on the type of heater and the complexity of the job. A professional can typically replace a standard tank-style water heater in one to three hours. However, if the work area is tight, such as a small closet or crawl space, the job could take four to five hours. Replacing an existing tankless unit takes about two to three hours, while upgrading from a tank-style to a tankless water heater is more complex and can take four to six hours. The project will take longer if you are switching fuel sources, such as installing a gas heater which can add about an hour to the timeline, or if the unit needs to be relocated.

You can and should vent the gas from your hot water heater to the outside of your home. Traditionally, these gases were vented back to other gas appliances, like stoves or furnaces, but many jurisdictions have outlawed this practice due to the risks it provides. 

Most water heaters today use atmospheric venting that exhausts the gas out of the home through a pipe.

Electric water heaters typically last 10 to 20 years, though proper maintenance can extend their lifespan. If your unit is over a decade old and showing signs of inefficiency—such as higher energy bills, frequent repairs, or leaks—replacement is a smart investment. Tankless models last over 20 years, which can make them a longer-lasting alternative to traditional tank water heaters.

A leaking water heater could potentially last for a few weeks or months before you need to repair it. However, it's not advisable to wait too long. Once your water heater starts leaking, it's likely that the underlying cause of the leak is getting worse as time goes on. Without immediate repair, your water heater could fail. Instead of using a leaky water heater, you should turn it off and call a pro to fix it.

The Washington, UT homeowners’ guide to water heater services

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