Water Heater Replacement & Installation Services


A reliable, functioning water heater in your home is more important than you may realize. Yes, we all enjoy a steaming bath or a hot shower in order to unwind from our day or start fresh in the morning, but that’s not all you should be thinking about. 

Have you considered all the other tasks and appliances that rely on your hot water heater in order to have a safe, clean home? Your dishwasher and washing machine both need a functioning water heater for ultimate cleanliness and sterilization. Washing your hands, cleaning the sink, and even your mop water needs to be hot in order to be both comfortable and provide top cleanliness.

The size and efficiency of your water heater is something you should consider for more than your daily showering. National Water Service is here to keep you up and running: safely, trusted, and ready for any weather that comes your way.

With two locations, one in Darnestown, MD and the other in Highland, MD, we are able to serve various Maryland and Virginia counties, like Loudoun County in VA, and Montgomery CountyHoward County, and Frederick County in Maryland, to name only a few of our service areas. We’re nearby, and we’re here for you.

Constant Water Pressure Control Box with Manifold and Hot Water Heater

Our Water Heater Installations in Maryland

water heater base

Whether you have an electric water heater, a gas water heater, or a hybrid water heater, our team of professionals knows how to service, repair, and install each variety for perfect home safety and comfort.

Even if you are handy around the house, we always recommend hiring a professional for such a large job as installing or repairing a water heater. Just like you hire us for your water treatments and water storage, treat your water heater services in Maryland the same way.

Improper gas line connections from a faulty install can lead to dangerous leakage of fumes, something you may be unable to detect right away, but our team has the equipment and knowledge to prevent right away. Even if you have an electric water heater, National Water Service has been completing water services for over 40 years, so we can be in and out with little inconvenience to you and your family.

We have a plumber on staff so every professional you need is part of our team, giving you peace of mind in our guaranteed services. No matter what is running in your home, contact us to discuss your options for the warmest water you can achieve.

Any make, model, and size, we’re here to give you the installation you deserve.

When Should You Replace Your Water Heater?

The average lifespan of a water heater ranges around a decade. For most people, this means they wait until their water heater has completely stopped working before they look into replacements.


While your water heater may seem to be running properly, its age can be showing in other ways you may not yet have noticed. Efficiency levels in appliances are advancing rapidly, which means even a well-working, aged water heater is still costing you in energy savings.


Waiting until your water heater has completely stopped working can mean you feel pressure to get a replacement in a rush. Reach out to National Water Service to discuss the age and operation of your water heater. 


Whether you’re shopping around or in need of a replacement now, we’re here to make sure your water heater investment is one you can rely on.

Whole House Water Treatment in Maryland

No Hassle Water Heater Repairs & Replacements 

Water heater repairs & replacements in Maryland

No matter what weather we are experiencing, do not let your water heater be a drain on you and your family. National Water Service has been around for numerous decades, and we’ve been listening to our clients to constantly provide the best service.

We added a dedicated plumber to our team, to ensure any water servicing upgrades you need can be done efficiently and with one, trusted company. We don’t just do water heaters, we manage well pumps, water storage solutions, and even sump pump services. That means we are your one-stop for all water solutions, no hassle, no multiple companies to manage, just great results.

With National Water Service aiding you, we provide the best tools, the highest knowledge, and a well rounded team. You don’t need to worry about what the future holds, because we’re here to double-check all installs and replacements, and service your water heaters to prevent them from failing — our clients trust us to come back again and again for any concerns they have about their water servicing equipment. 

Your house relies on your functioning water heater, so rely on us to keep you running. Reach out to us today, because trusted water isn’t something to delay about. 

We Have a Variety of Water Heaters for Sale

natural gas water heaters

Conventional Storage Tank Water Heater

propane water heaters

water heater services in MD

electric water heaters

Professional Water Heater Services MD

hybrid water heaters

Constant Water Pressure Control Box with Manifold and Hot Water Heater