Thomas E Clark

★★★☆☆ 3.4 / 5 (118)
Emergency Call


: Washington, DC, DC 20008
: (301) 703-9079
: http://www.thomaseclark.com/

Company Overview

Since 1891, our family has proudly operated this business. We provide plumbing, heating, and air conditioning solutions for both residential and light commercial needs. We offer both service and remodeling options. We work with gas and electric water heaters, hot water boilers, steam boilers, tankless units, gas furnaces, heat pumps, and filtration systems. We provide carbon monoxide testing, combustion analysis, air diagnostics, sump pump services, UV light installations, air cleaning, humidification, and water and sewer line replacements. We specialize in drain cleaning, sewer video inspections, duct cleaning, ductless mini-splits, and SpacePak high-velocity HVAC.

Since 1891, Thomas E. Clark has been the oldest plumbing, heating, and air conditioning contractor serving the Washington DC area. Now, six generations later, we remain a family-owned business. Our guiding principle has kept us among the top companies in the region for over 120 years. Our family has embraced the motto, “Treat the customer like a friend, and you gain a customer and a friend for life,” from day one. This philosophy remains at the heart of our operations. Reach out to us today and discover our commitment to service.

I, along with my nephew Michael Hartman, own Thos. E. Clark. I previously owned and operated Hartman Plumbing before assuming control of the company in 1991. Having over 40 years of experience in plumbing, I began as an apprentice and advanced through the ranks.

With more than 20 years in heating and air conditioning, Michael brings valuable expertise. After graduating from Salisbury University in 1990, he also started as an apprentice.

Both of us stay updated on the latest technologies while maintaining the core values that have made Thos. E. Clark a trusted name in the Washington DC area.

Business Services

  • Bathtub installation
  • Bathtub repair
  • Drain installation
  • Drain repair
  • Faucet installation
  • Faucet repair
  • Garbage disposal repair
  • Gas line installation
  • Gas line repair
  • Plumbing inspection
  • Plumbing installation or replacement
  • Plumbing repair
  • Sewer installation
  • Sewer repair
  • Shower installation
  • Shower repair
  • Sink installation
  • Sink repair
  • Toilet installation
  • Toilet repair
  • Water heater installation
  • Water heater repair
  • Water pipe installation
  • Water pipe repair

Business Location & Hours



Mon:7:30 AM - 10:00 PM
Tue:7:30 AM - 10:00 PM
Wed:7:30 AM - 10:00 PM
Thu:7:30 AM - 10:00 PM
Fri:7:30 AM - 10:00 PM
Sat:7:30 AM - 10:00 PM
Sun:7:30 AM - 10:00 PM

Recommended Customer Reviews

Callie O.
★☆☆☆☆

I've called this place 3 times this evening, spoken to a different phone operator each time who was not able to connect me to or ask questions to the original person I spoke to. So much for a small family business.

Originally it sounded like someone would definitely be able to come out tonight, the second time I called for an update (a few hours later, she said someone would be coming out. A few minutes later I got a call back and the operator told me the cost would be more since it is after hours, but they would still come out. She said she would call me back with an ETA.

The third time I called I spoke to a woman who could not confirm if anyone would actually be able to come tonight. I explained that I was waiting for a call back with an ETA, and she explained that they don't call back, and said there was no way anyone from there called me.

So obviously, I must be crazy.

Ed L.
★★★★★

used them for my air conditioner. Guy named Dan came out on Sunday service, knew what he was doing, and like other reviewers said, didn't skewer me on the pricing. Highly recommend.

Leigh Z.
★★★★★

Matt, one of Thomas E. Clark's employees, is great! He has been to our house on two separate service calls and has been beyond professional each time. He is knowledgeable and is willing to explain what he's doing and why. Overall, our experience with Thomas E. Clark has been very good and we will definitely use them again in the future, but I wanted to especially give kudos to Matt!

Ted V.
★☆☆☆☆

Technician came out on Saturday $104 ""trip charge"". Problem was bad thermocouple on boiler ($15 part). They wanted $275 to replace. It took about 5 mins. When I questioned they agreed to charge ""only"" $200 + $104 trip charge. Owner said this was due to the expertise and the skill to diagnose the problem. By my calculation this technician's company made about $3190/hour on this job. Not too shabby, but I'd go to jail if I tried to charge that much. Maybe Thomas E Clark should be jailed too?!

Courtney A.
★★★★★

I had Thomas E Clark out twice now and I've been thoroughly impressed both times by their professionalism, knowledge, and honesty.

The first time was for a humidifier. They gave me all my options and the prices and carefully outlined the pros and cons of each. They eventually steered me towards the cheapest option. (It works great and installation was very professional, clean...) while I had the rep here I asked about an unrelated issue--getting my house to heat and cool more evenly. He told me my options again and honestly told me the highest cost one was probably not what I really wanted because it was best suited for when you're going to be opening up all the walls anyway. The rep gave me a free, easy idea to try and it worked! Wow.

This most recent time I had the plumbing guys out to discuss a backwater valve. The rep told me the pros and cons of the valve itself and evaluated my house's suitability for it/need for it. He basically told me it isn't necessary for me and would cause a huge mess and high costs.

Yet again since I had him here I asked about an unrelated issue-sewer gases getting into our house. Others I've talked to told me I'd need to rip out the walls and ceiling in the bathroom to get at the venting--very expensive. Thomas E Clark's guy looked at my problem and came up with a cheaper, less invasive solution to try first.

Common sense, honest HVAC and plumbing? I think I'm in love.

Ken C.
★★★★★

On time. Prepared. Knowledgeable. Not the cheapest but totally reasonable. I'll use them again for sure.

Andreas B.
★☆☆☆☆

My credit card got charged more then double what I was quoted on the phone for their initial assessment of my HVAC system. There was a clear lack of communication from their service representative.

The repair itself was good, but probably significantly more expensive than other HVAC specialists in the area.

Amy P.
★★★★★

I found Thomas E Clark here on Yelp and have two totally different issues over the past month. They were quick to respond to my call and to schedule. Both the folks on the phone I dealt with re: scheduling and the in person technicians were great! I had a plumbing issues (had to replace a temp valve in my shower) and a broken heating trane heating/air system. The fees were reasonable and the service was great. I had two different guys and both were awesome. I highly recommend there services!!

Lawrence I.
★★☆☆☆

I'm afraid I was not impressed by this company and would not recommend them to others.

For starters, they are expensive. Back in August I asked them to inspect my heating and AC system. After completing the inspection and replacing several parts, i was stunned to receive a bill for $1158. They also recommended that I replace a furnace fan motor which would have cost an additional $800.

Last week, while replacing the furnace air filter, I noticed water accumulating under the unit. I thought that, after the August inspection, problems like this would not occur. As such, I called the company to see if they would send out a technician to diagnose the problem and not charge me for the follow-up visit. Ironically, the company representative placed me on hold and a recorded message said ""Thomas Clark guarantees its work."" When the rep got back on the line she said the leak was probably a result of the fan motor which I had not replaced.

I then arranged to have a technician from another company come out to fix the leak. He quickly identified the source of the leak which, as it turns out, had nothing to do with the fan motor. I believe the technician from Thomas Clark would have caught this problem if his initial inspection was more thorough.

In summary, I'd only deal with this firm if you have money to spare and take their customer assurance for ""quality service"" with a grain of salt.

Adriel H.
★☆☆☆☆

I've used Clark for plumbing for years and they always do a fine job but just had a horrible customer service experience and will be switching to a new service--given the competition in the DC area would much rather spend my money with a company that values me as a customer.

I had an appointment this morning and the plumber called my landlord instead of me (though I ensured they had the right numbers when I made the appointment) and said they were at my house and no one was home. This was not true as my nanny was sitting 10 feet from the front door waiting for them and no one came to the house, nor called my house. The plumber said that since no one was home he was going to a different job and would come back to my house (of course hours later).

When I called the company they said that he hadn't been to my house but that the plumber had called and no one answered and therefore went to a different job. I explained the call my landlord received and the customer service woman denied it happened. I told her I was disappointed in the service, especially that there was no apology for the fact that at minimum the stories didn't make sense and at the worse the plumber was outright lying. She refused to apologize, said that the company had done nothing wrong and that he had not come to my house and had not been able to reach anyone when calling.

disappointing all around.

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