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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

Gas water heaters last between eight and 12 years on average. You can help them reach their maximum lifespan with regular cleanings, maintenance, and professional checkups, though don’t hesitate to swing for a full replacement if the total cost of repairs is greater than that of purchasing and installing a new unit. 

On average, a tankless water heater should last between 10 and 15 years. Its lifespan will be affected by how much it's used, the effect of weather where your home is on the unit—colder is harsher and will shorten lifespan—and if the heater is maintained appropriately and regularly. There are many signs your water heater needs to be replaced, so pay attention to anything that changes with your heater or hot water.

If you're replacing a broken water heater, now is a great time to make sure you're selecting a unit that has the right capacity for your household. According to the U.S. Department of Energy, a small 50-gallon to 60-gallon tank is sufficient for households with one to three people. A medium-sized 80-gallon tank is considered ideal for three to four people. A larger tank may be needed if your household has four to six people.

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

You can use multiple tankless water heaters, but that doesn’t mean you should. Adding multiple tankless heaters adds considerable cost to your home in both parts and installation costs. Also, you’re adding many more points of failure in the system, making plumbing issues harder to diagnose. More heaters mean more maintenance, and insurers may want a word regarding the increased risk of water damage. A single, larger unit makes more sense in most situations.

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.