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Best water heater pros near Johnston, SC

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

Avatar for Powell Plumbing, LLC
Powell Plumbing, LLC
5.0(
7
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Johnston, SC and surrounding areas

In business since 2023

Credit card accepted

I can cover all your plumbing needs from small repairs to large repairs, whatever you need, including drain cleaning. I pride myself on the quality work I provide, while delivering great customer service. Call -or- click to schedule an estimate today!

Response time2 days
Response rate100%
Recommended by85%of homeowners
Avatar for Mathis Plumbing & Heating Co Inc
Mathis Plumbing & Heating Co Inc
5.0(
2
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+1 more

Serving Johnston, SC and surrounding areas

In business since 1952

Emergency services offered

Credit card accepted

Mathis Plumbing & Heating Company, Inc., is the only Plumbing Company to be awarded the SBA Family-Owned Business of the Year by South Carolina as well as the entire 8-State Southeast Region. The Mathis Family has been proudly serving Upstate SC with indoor comfort needs of friends and neighbors like you since 1952. Our many services include plumbing, drain cleaning, pipe lining, barrier pipe coating, heating, air conditioning, indoor air quality, and more. You can feel assured you will not only get timely and guaranteed quality work, but receive that extra attention as Mathis understands their family's name and reputation rides on every job they do.

Shower Valve Repair
Completed Moen Shower Valve Repair
Response time10 mins
Response rate100%
Avatar for SOUTHERN PLUMBING AND ELECTRICAL COMPANY, INC.
SOUTHERN PLUMBING AND ELECTRICAL COMPANY, INC.
4.1(
28
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Repair+3 more

Serving Johnston, SC and surrounding areas

In business since 1987

Emergency services offered

Small jobs welcome

At Southern Plumbing & Electrical we believe in providing the highest quality services in the Aiken-Augusta areas, completed by experienced, friendly technicians. With almost four decades of service, you can trust the reputation and experience of Southern Plumbing & Electrical, Inc.

Recommended by64%of homeowners
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 Johnston, SC 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
Mr. Fix Everything Pro Services
5.0(
2
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Johnston, SC and surrounding areas

In business since 2019

Free estimates

Credit card accepted

Mr. Fix Everything Pro Services in Columbia, SC. Your one-stop solution for toilet, fan, faucet, garbage disposal, handyman, and plumbing needs.\n\nWe serve in Columbia, SC, Forest Acres SC; Seven Oaks SC; Dentsville SC; Cayce SC; Irmo Town SC; and the surrounding areas.\n\nPlumber, Plumbing Contractor, Plumbing Expert, Residential Plumbing Services, General Plumbing And Heating\nProfessional Plumbing Company, Affordable Plumbing Company, Reliable Plumbing Company, Basic Plumbing Company, Complete Plumbing Company\n\nFor more information visit our website: https://mrfixeverythingpro.com/

Electrical Project
Electrical Project
Electrical Project
Plumbing Project
Electrical Project

+2

Recommended by100%of homeowners
Brian's Installations LLC
3.5(
38
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Johnston, SC and surrounding areas

In business since 2000

Free estimates

Brian's Installations is an experienced general contractor you can trust. We have built a solid reputation in the community for our outstanding attention to detail and superior customer service. Additional E-mail - [email protected]

Recommended by95%of homeowners
Premier Well Services and Repair
4.3(
4
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Johnston, SC and surrounding areas

In business since 2000

Free estimates

Emergency services offered

Full service handyman - I can handle any kind of job around your house! Experienced in plumbing, well service an repairs .electrical, paint, drywall, TV mounting, Furniture assembly & more - call today for a free estimate!

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

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.

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.

Most standard residential water heaters, which are typically around 40 gallons and use 240 volts and between 3,500 and 5,500 watts, require a 30-amp, two-pole circuit breaker. For smaller, point-of-use water heaters using 120 volts and between 1,500 and 3,000 watts, a 30-amp breaker is also often adequate. However, some models may have different needs; units that use more watts than average may require a 40-amp breaker, while smaller units might only need a 20-amp breaker. Newer, tankless, or more energy-efficient models can also require a higher amperage. Having the correct breaker size is crucial for safe and efficient operation, so it's best to consult a licensed electrician to determine the specific needs of your water heater.

No. Expansion tanks must be installed on the supply side (where heated water flows out) of the boiler. There’s also a list of other requirements for most boilers, including being above the pressure relief valves, being on the inner side of any circulator, and more. Your installation manual should have more information on expansion tank installation requirements and what sort of tank the system is made for.

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.

The Johnston, SC homeowners’ guide to water heater services

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