Tankless Water Heaters · Clarksburg, MD

Tankless Water Heaters

Endless hot water.

A tankless water heater heats water the instant you need it, so you never run out and never pay to keep a tank hot all day. We install, repair, replace, and convert homes to tankless across Clarksburg, Germantown, Gaithersburg, and Montgomery County, sized and set up so it works the way it should from day one. Searching for tankless water heater installation near me? You found your local crew.

Endless Hot WaterLicensed & InsuredEnergy Efficient
Book OnlineCall Now
On demand
Hot water that never quits
The basics

How a tankless water heater works

Instead of storing and reheating a tank of water around the clock, a tankless unit heats water only when you open a hot tap. Water flows through a powerful gas burner or electric heat exchanger and comes out hot in seconds, for as long as you need it. When you turn the tap off, it stops. That is why tankless units use less energy, take up a fraction of the space, and can deliver hot water for as long as the shower runs. They also last far longer than a traditional tank, which is why so many Clarksburg and Montgomery County homeowners upgrade. Prefer a traditional tank? We do those too.

What we do

Tankless water heater services

Installation, conversions, repair, and the maintenance that keeps a tankless running for decades.

Tankless Installation

We size the unit to your home’s hot water demand and install it correctly, including gas, venting, and water connections.

Book it

Tank to Tankless Conversion

Switching from an old tank? We handle the full conversion, from removing the tank to upgrading the gas and venting it needs.

Book it

Tankless Repair

Error codes, no hot water, ignition or gas burner faults, and flow problems diagnosed and fixed by techs who know these units.

Book it

Descaling & Maintenance

Maryland hard water leaves scale inside the heat exchanger. Regular descaling keeps your unit efficient and protects the warranty.

Book it

Gas & Electric Tankless

We install and service both gas and electric tankless heaters, and help you choose the right fit for your home and budget.

Book it

Tankless Replacement

If your tankless is past its prime, we swap it for a new high efficiency unit with minimal disruption.

Book it
How it works

Hot water the moment you ask for it

No tank, no waiting, no standby loss. Here is what happens when you open the tap.

1

You open a hot tap

A shower, sink, or appliance calls for hot water anywhere in the home.

2

Flow sensor fires

The unit senses the water moving and instantly ignites the burner or elements.

3

Water heats on the move

Water races through the heat exchanger and comes out hot within seconds.

4

Endless, then off

It keeps heating as long as you need, then shuts down completely when you stop.

Why homeowners switch

The benefits of going tankless

It is one of the few upgrades that pays you back every month while making daily life easier.

Endless hot water

Long showers, back to back, plus laundry and dishes, without ever running cold.

Lower energy bills

No reheating a full tank all day means less wasted energy and real monthly savings.

Space saving

A unit the size of a small suitcase mounts on the wall and frees up your floor.

Lasts much longer

A well maintained tankless can run 20 years or more, roughly double a typical tank.

No tank to burst

With no stored tank of water sitting in your home, there is far less risk of a big leak.

Fresh, not stored

You get freshly heated water on demand rather than water that has sat in a tank.

Ready for endless hot water?

Know your options

Gas, electric, and the right size

The key to loving a tankless is sizing it to how much hot water your home uses at once. We get that part right.

Gas Tankless

The most common choice for whole home use. High output handles several fixtures at once, with proper venting that we install.

 
6088-Tankless Water Heater

Electric Tankless

Compact and simple with no venting, great for smaller homes, additions, or point of use spots like a single bathroom.

Sizing by Flow Rate

We calculate your peak demand in gallons per minute, counting the fixtures you run together, so it never falls behind.

Not sure tankless is right for you? We will compare it honestly against a traditional tank water heater for your home.

Built for Maryland homes

Hard water and your tankless

Tankless units are efficient, but Maryland hard water leaves scale on the heat exchanger that can choke performance and void a warranty if ignored. The fix is simple: descale on a schedule. Many manufacturers require it, and we make it easy with an annual visit.

  • Descale the heat exchanger about once a year
  • Clean the inlet filter so flow stays strong
  • Pair it with whole house filtration to slow scale
  • Keep the venting and gas connections checked and clear
Annual peace of mind

Add it to a membership

Our membership includes an annual tankless descaling and inspection, which keeps your unit efficient and your manufacturer warranty intact.

See Membership Plans
The people in your home

A crew you are glad to let in

Every technician is part of our own trained, background checked team, not a subcontractor. We size your system right, install it cleanly, and show you how to get the most out of it.

Clarksburg Plumbing Crew
From our neighbors

What your neighbors say

4.8
Based on 538 Reviews
google
Kevin
August 20, 2026

Knowledgeable technicians who explained everything in detail and did a great job installing my new water heater.

google
Lynn A.
August 18, 2026

We had our first experience with Clarksburg Plumbing & now we're sold! Charlie replaced our powder room toilet & did a great job. We moved to our house 3 years ago (& needed a new plumber) so we're happy to a great plumber now. Highly recommend!

google
Stephanie B.
August 13, 2026

Booked an apt with Clarksburg plumbing at 7am and by 9am they were at my house. Seth was a great tech that explained anything he was doing and answered my questions. would use Clarksburg plumbing again.

google
Susan F.
August 11, 2026

Highly recommend John Brown from Clarksburg Plumbing LLC! Yesterday John flushed and descaled our tankless water heater. We've gotten used to waiting and waiting for service people. That's not the case with John. He arrived pleasantly early for both the initial visit (for a no-cost estimate) and for the actual service call. He was personable, knowledgeable, and very patient with our many questions. He really helped us understand the ins and outs of this new-to-us technology of tankless water heaters. We're already recommending him to our neighbors!

google
Judith
August 10, 2026

John and Maddie were professional and customer focused. They completed several plumbing projects efficiently and verified my satisfaction with the work. John diagnosed a plumbing problem for future remediation. Great people and company.

google
Daniel J.
August 7, 2026

I had Clarksburg Plumbing come out for a minor home plumbing repair. Seth and Maddie were on time, friendly, and professional. They provided a free estimate, and I went ahead with the repair. The repairs took just under 2 hours and I was completely satisfied with the service. I will definitely use Clarksburg Plumbing again in the future. Thanks, Seth and Maddie!

google
Dennis D.
August 7, 2026

We had a very good experience with Clarksburg this year. A new fresh water pipe from the street and cleaning the waste pipe. From Brady in the office to John Brown and his team on site (Franklin and Chris) everything went smoothly, successfully, and on time. Would highly recomnend!

google
Ryan
August 7, 2026

Charlie S. was efficient and friendly. He also answered some of my plumbing questions which I greatly appreciate. I will be using Clarksburg Plumbing in the future.

google
Lisa W.
August 7, 2026

I recently used Clarksburg Plumbing for a condo repair of my main water turnoff valve and my outside hose bib. It required coordination with DC Water and the condo, and Clarksburg was extremely helpful, professional, and patient in the process. They came out a few times to evaluate and troubleshoot the issues, and then ultimately performed/made the repairs. Garrett and John Brown were the first to help, both very kind, knowledgable and highly skilled, and then Pablo (along with apprentice Tevon) made the final repairs. Not only did they do a great job, explaining everything to me in the process and checking after the water was restored to the condo, they also helped out one of the other owners that was having a sudden, luckily minor issue, as well. It’s a relief to know that I finally have a plumbing company that I can rely on for any future issues.

google
J C.
August 3, 2026

John Brown & Maddie did a great job with installing our new sump pump and battery backup--very informative, patient and thorough.

google
Daniel C.
August 3, 2026

Many thanks to John and Maddie for their excellent work and cheerful attitude.

google
Ev Z.
August 3, 2026

Pablo was responsive & efficient on a late Sunday evening. Thank you

google
Joye K.
July 31, 2026

We had a fire at our house 3-Jul-2025. Our contractor used Clarksburg Plumbing for all of our plumbing needs as we rebuilt our house. Pablo was with us from the beginning until all work on the house was completed a year later. Pablo was the lead plumber from Clarksburg Plumbing. He worked on the plumbing rough-in in December through February this past winter in bitter cold through the end of July 2026 when work was finally completed. Pablo quietly does his work. It’s clear that he is very skilled but he is not arrogant in any way. Rather, he is very engaging, takes suggestions under consideration and employs them as warranted, and is always kind even when I interrupt his work. Pablo represents Clarksburg Plumbing very well. It was my pleasure working with Pablo.

google
Prabhu P.
July 30, 2026

John & Maddie were great to get me scheduled for a potable water replacement

google
Erin M.
July 30, 2026

Properly identified the source of my leak after multiple other plumbers/companies couldn’t figure it out. Were thorough in explaining what they were doing, how they arrived to their determination, and gave advice on how to proceed with next steps that were outside their scope of operations. Thanks Pablo and Tevon

google
Jason R.
July 28, 2026

So grateful for you all, after 10 years and multiple plumbers your techs Garrett and Brady found the problem in 10 mins. Professional, friendly, knowledgeable, and we are more than satisfied with the work. Great company, great employees. We have a plumber now!

google
Ajay P.
July 23, 2026

We had a severe blockage in our kitchen sink drain, causing water to back up into both the sink and the dishwasher. Seth and Brady arrived on time, quickly identified the issue, and did an excellent job clearing the kitchen drain. They also fixed the dishwasher drain line, which is now working perfectly. They were professional, efficient, and courteous throughout the process. I highly recommend them to anyone needing plumbing services.

google
Abbie C.
July 22, 2026

Recently had an issue with my hot water heater in the restaurant I worked at. Clarksburg plumbing was quick and efficient and I was lucky enough to get John and Maddie as my techs! They were knowledgeable and helpful and fixed the issue in no time. I can’t recommend Clarksburg Plumbing enough and especially John and Maddie. They were honestly wonderful.

google
Anna F.
July 22, 2026

John and his assistant, Maddie, replaced an outside water valve and reviewed plumbing in a bathroom. They did excellent work, gave good advice and were friendly and nice. We were pleased with the work and will contact them at Clarksburg Plumbing for any plumbing needs in the future.

google
L C.
July 20, 2026

John was very knowledgable and provided all the details I needed to make my decision on what I wanted. Matty give me the exact estimates to consider. They were very curteous and professional. Thank you.

google
Chantell P.
July 20, 2026

John and Maddie arrived on time and were professional and kind! All issues were resolved without issue! Highly recommend!

google
David G.
July 19, 2026

Happy we called them. It is refreshing to deal with a company a company with great customer service and honest techs. Highly recommend you call them.

google
Christine K.
July 18, 2026

Seth was very professional, quick and efficient. Also kind and personable.

google
greg N.
July 16, 2026

Franklin, Chris and Colton, are hard working knowledgeable. They are polite and friendly. They ran into some issues replacing my out side water line. The problems were solved. They cleaned up all debris. I would request this crew if I ever have another plumbing issue. Thank you guys!

google
S D.
July 16, 2026

Highly recommend Clarksburg Plumbing! They accommodated my schedule right away. John and Maddie were amazing!! They took care of my pipe repair quickly and efficiently! 10/10 recommend!

Good questions

Tankless water heater FAQ

What homeowners ask us most about going tankless.

With regular descaling, a tankless unit commonly lasts 20 years or more, roughly double the life of a traditional tank. Skipping maintenance in hard water areas like ours is the fastest way to cut that short.

Yes, on energy. A tankless only heats water when you use it, so you are not paying to keep a tank hot 24 hours a day. The upfront cost is higher, but the monthly savings and longer lifespan make up for it over time.

Not if it is sized right. A tankless makes hot water continuously, so it will not empty like a tank. The key is matching the unit to your peak demand, the fixtures you run at the same time, which we calculate before we install.

For most homes that use a lot of hot water or want endless supply, yes. You gain space, lower bills, and a longer lifespan. For a small home with light use, a quality tank may make more sense, and we will tell you honestly which fits.

Gas units deliver higher flow and suit whole home use, but need proper venting and a gas line. Electric units are compact, simple, and great for smaller homes or single points of use. We help you choose based on your home and demand.

Yes. The most important task is descaling the heat exchanger about once a year, especially with Maryland hard water. It keeps the unit efficient and is often required to keep the manufacturer warranty valid. We include it in our membership.

Absolutely. We handle the full conversion, including removing the old tank and upgrading the gas, venting, and connections the tankless needs. We will assess your setup and give you a clear, upfront quote first.

Yes. We are fully licensed and insured, every technician is background checked, and we are available 24/7 for plumbing emergencies across Clarksburg, Gaithersburg, Germantown, and the surrounding Montgomery and Frederick County area. Call 301 972 2223 any time.

Ready for endless hot water

Go tankless with us.

Let's Flow.

Thinking about an upgrade, or need your tankless serviced? Book online or call and talk to a real neighbor. We are here 24/7 for emergencies.

Book online

Let's get started

(301) 972 2223

Available 24/7 for Clarksburg and beyond

Book a service