Expert Plumber in Ellicott City and Clarksville, Maryland

Now Serving Howard & Montgomery Counties!

Complete Plumbing Services for Homes and Businesses

Plumbing Services in Ellicott City & Clarksville, MD

National Plumbing and Mechanical Services is proud to offer complete plumbing services in Maryland for homes and businesses. We are your go-to plumbing company for emergency plumbing, gas lines, residential upgrades, commercial maintenance, and more.

Emergency Plumbing

Leaks, clogs, and burst pipes don’t wait. Get emergency plumbing repairs from National Plumbing for water heater malfunctions, pipe leaks, sewer backups, faucet repairs, and much more. → Learn More

Leak Detection

Never again worry about your home water system, sudden leaks, keeping up with water filter maintenance, losing water to left-on taps, or experiencing unexpected frozen or burst water pipes. The DROP water system monitors your home’s water, water temperatures, water flow, and more so you can get live alerts on the status of your water anywhere, any time. → Learn More

Drain Cleaning

Professional drain cleaning is a fast, efficient way to stop wastewater from backing up in your pipes. Clogged drains can lead to leaks, water damage, and even mold growth out of sight. Get drain cleaning maintenance from our professionals. → Learn More

Faucet Installations

No more leaky faucets, endless drips, or out-of-style faucets. A new faucet installation from professional plumbers is a fast way to improve your aesthetics and function. → Learn More

Garbage Disposals

New garbage disposal replacements in Maryland can help with clogged drains, foul odors, and constant repairs. Get a powerful and reliable garbage disposal that works effortlessly, leaving your sink and pipes clear and odor-free. → Learn More

Gas Plumbing

Professional gas line installations professional plumbers ensure there are no leaks, you have regular pressure regulation, and secure valves for reliable shut-off when needed. Get gas plumbing for your barbecues, grills, fireplaces, and other appliances. → Learn More

Outdoor Kitchens

Maintain and upgrade your outdoor kitchen plumbing today. Get pipe fittings, propane and natural gas, outdoor sinks, outdoor drains, BBQ stations, and more. → Learn More

Sump Pumps

Don’t let your sump pump fall into damage or disrepair. A properly functioning sump pump stops flooding of your basement and low lying areas of your homes. → Learn More

Water Heaters

National Plumbing and Mechanical Services is proud to provide tankless water heater services for water heater installations, operating maintenance, and repairs. → Learn More

National Water Service

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Why Choose Us?

National Plumbing Works For You

National Plumbing and Mechanical Services was born out of National Water Services, a company that has been providing water services to Maryland for over 45 years. We have hundreds of 5-star reviews and decades of experience that we bring to every job and every customer.

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Accurate Plumbing Repairs At Fair Prices - Our Promise To You.

Emergency Services

Don't let leaks or clogs get the best of you -- call for emergency plumbing repairs 24/7

Satisfaction Guarantee

We take our customer service seriously -- we make sure you're happy with the job before we sign off

Competitive Pricing

All of our plumbing services are priced at affordable rates so you can get quality jobs on any budget

45 Years of Experience

We started off as National Water Service providing water treatment and have continued to expand to meet the needs of our clients

Our Reviews

Based on 371 reviews

    
 
 
        
   Shari Hammond 
 2024-09-23
 
 
  Thorough, polite and professional. I loved working with this company!

From 9/19/24 Unbelievable experience. We had 2 other plumbers come and claim to have fixed the problem. We got Dave’s name as a referral from Kendall’s Hardware. He’s a master plumber and he truly is. He did a thorough examination of the problem and came up with a plan. They followed through with that plan a week or so later (it was a two day) it was successful. The best part was how he listened to us and didn’t assume he already knew. He is a brilliant plumber and the company is wonderful to work with. Very professional. I’m very grateful. Thanks National Water!
  
 
       
   Dawn Richardson 
 2024-09-23
 
 
  I highly recommend National Water Service!   Our representative, Heather and our installer were awesome.  Heather explained the equipment I current had, any issues she identified and explain solutions and why she was suggesting them.  She was great. I had additional questions after she left, and she responded immediately.  Our installer was very though in explaining the installation, the maintenance that is needed and how everything worked. I really appreciated the time both of them spent with me and am glad I hire them.
  
 
       
   Rich Gibson 
 2024-09-23
 
 
  Technician was a knowledgeable professional.   Showed up exactly on time.   Explained things clearly and courteously.  Pricing was very reasonable.
  
 
       
   Charlotte Mullican 
 2024-09-20
 
 
  Great and fast service. Have used them for years and always had excellent results.
  
 
       
   EricNicole Eckenrode 
 2024-09-19
 
 
  Once again, National Water Services to the rescue! Quick service and great advice. Hot showers are back in style at our house! Yay!
  
 
       
   Courtney Moon 
 2024-09-18
 
 
  We are new to well water. The techs who came out to our home were super professional and communicative about what they were doing and why. They gave us a detailed overview of all the components of our home water system and educated us on how to best maintain our system between annual visits. Very satisfied with our experience!
  
 
       
   Helen W 
 2024-09-18
 
 
  I called on a Sunday afternoon after my well pump quit working. John answered the phone and someone was there within an hour. Daniel carefully assessed the situation and determined that my well pump was not functioning. He then went on to see if he would be able to make the repair. After determining what would need to be done is to replace the water pump, he let me know that he would have a crew at my house first thing in the morning. They notified me that they were on their way before 9am the next day and by 12:00pm my was water flowing. I’ve been a National Water Service costumer for 25 years and that will continue. They are timely, professional , and their employees are knowledgeable in service and repairs. If you’re on well water and want to improve the water quality and maintain your equipment call National Water Service.
  
 
       
   Chris Shim 
 2024-09-17
 
 
  National Water Service texted an estimated time of arrival. Dedicated workers explained the process, answered all questions, and completed all work in a timely manner.  They were very professional and put on boot covers to keep my floor clean as they entered the home!  Fantastic job by National Water Service to provide me with clean water.  I recommend them for all water treatment, well pump, and plumbing needs.
  
 
       
   Betty Steil 
 2024-09-16
 
 
  Punctual, courteous service.  As a Senior, I appreciated your patience explaining to my daughter and me the process and chemicals required for maintenance of our water treatment.  Currently, with additional family in the household, this will be necessary more frequently, so acquiring some to-it-yourself knowledge was appreciated.  The tech even explained the components in our local well-water and the impact on our tropical fish and graciously endured our recording the service visit for future reference.
  
 
       
   Katie Fallen 
 2024-09-16
 
 
  National Water always does a great job servicing our complicated well water system.  They are timely, efficient, knowledgeable, and kind.  I would recommend them to anyone for their water treatment needs.