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

Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Plains, MT and surrounding areas

In business since 1971

Credit card accepted

"The yearly service works out to be $50 a month. We've had two water heaters replaced through them because of a fault in them. They're usually very responsive. I like that I can request the service online. The only thing is, I wish that there was a better avenue for emergency services. If something doesn't work right away usually it takes a couple of days to get someone out and sometimes you can't wait two days without water."
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+2

Recommended by65%of homeowners
Avatar for Planetary Systems, Inc.
Planetary Systems, Inc.
0.0(
3
)
Solar Water Heater System - Install

Serving Plains, MT and surrounding areas

In business since 1994

Free estimates

Credit card accepted

Planetary Systems has been designing and installing renewable energy systems since 1994, and has over 1600 operational systems from .5kw to 22kw, worldwide. We have always been and remain committed to tested and reliable, yet cutting edge technologies to advance local power generation capabilities. We firmly believe all electrical power should be locally generated and using as much energy as practically feasible from wind, solar, hydro-electric and other renewable sources. \n Planetary Systems offers our own battery technology, integrated power solutions, and the best available products available in the world marketplace. \n \nOur offerings are based on value-added products, not bargain basement prices, and include complete testing, design and integration of systems plus expert technical assistance.

 Grid-tie sell back power system
 Gird-tie sell-back power system
 Off-grid power system
 Grid-connected back power
 Pole mounted solar arrays

+7

Recommended by100%of homeowners
Avatar for RJ HVAC
RJ HVAC
New to Angi
Tankless Water Heater - RepairTankless Water Heater - Repair - For BusinessWater Heater - Repair or Service+1 more

Serving Plains, MT and surrounding areas

In business since 2025

Emergency services offered

Small jobs welcome

Hi my Name is Reeve. I provide honest and accurate prices for service and repairs of residential and commercial hvac systems. Everything from tune ups to full system replacements. I currently hold my EPA universal license and Montana state boilers license. I also have many certifications on different types of units and systems, with endless hours of factory training. I?ve worked in both the commercial and residential space over my 9 years of experience. I value myself on honest and up front diagnostics and repairs. Located in Kalispell but will service from Missoula to eureka.

Rtu replacement
Mini split maintenance
Avatar for TCH Builders & Remodeling
TCH Builders & Remodeling
4.0(
2
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Plains, MT and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

If you dream it, we can build it. What's the biggest difference between us and them? We build to last! We offer a full line of Green and Energy Star Certified products, backed by our labor and manufacturer's lifetime transferable warranties. Credit Cards Welcome Financing Available OAC.

Recommended by100%of homeowners
Water Heaters FAQs, answered by experts

The standard copper wire gauge to use with any 30-amp circuit is a 10-gauge wire. The National Electric Code specifies a 10-gauge wire with appliances like water heaters running on 30 amps. If you try to use a smaller gauge wire, such as a 12 gauge, with a 30-amp breaker, you run the risk of the wire overheating and melting or causing a fire. Because of the safety hazards, the gauge of the wire is not an area to try to cut costs when connecting a 30-amp breaker to a water heater.

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.

No, you’ll need to drain the tank before changing a water heater element, as the water heater element sticks through the side of the tank and uses a gasket to prevent water from pouring out. However, you don’t always need to drain it completely. If you’re only replacing the upper heating element, you can drain the tank until the water line is below the element. If you’re replacing the lower element, you’ll need to drain the whole thing.

Installing a water heater without a permit can result in high fines—as much as hundreds of dollars per day, in some areas. It can also void your homeowners' insurance and cause problems when selling your home because it violates local building codes and safety regulations.

The lifespan of a water heater depends on its type, usage, and maintenance schedule. Traditional tank-style water heaters typically last between 8 and 12 years, though the range can be as wide as 6 to 15 years. Within this category, gas models often last 8-12 years, while electric models may last 10-15 years. In contrast, tankless water heaters have a significantly longer lifespan, often lasting up to 20 years or more. Factors like heavy usage, hard water, and sediment buildup can shorten a unit's life. To extend its lifespan, it is crucial to perform regular maintenance, such as flushing the tank annually and scheduling professional inspections. If your unit is over a decade old and shows signs of rust, leaks, strange noises, or inconsistent heating, it is likely time for a replacement.

The Plains, MT homeowners’ guide to water heater services

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