301-854-1333

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  • Home
  • Services

    • Commercial Water Treatment Services
    • Residential Water Treatment Services
    • Water Heaters
      • Water Heaters for Sale
    • Plumbing Services
    • Lifetime Warranty Well Pumps
    • Pressure Tanks
  • Contact Us
    • Our Locations

      • Darnestown MD
      • Highland MD
  • Blog
  • Gallery
  • Info
    • Manuals & Brochures
    • How To
    • About
    • Testimonials
    • Water News

Well Service & Repair, Pressure Tanks & More

What is your issue?

Need Commercial Services?

Constant Pressure

GRUNDFOS & SUB-DRIVE UTILITY

Conventional Pumps

Lifetime warranties & constant pressure

Lifetime Warranty Pumps

Never worry about a break!

Well Enclosures

Artificial Rock Enclosures

Emergency Service

Contact us for emergency service, 24/7

Custom Repairs

Jet Pump Conversions & Well Pit Repairs

Pressure Tanks

Steel and Composite

Low Yielding Wells

Wells and Irrigation Storage

Home Builders

Home Builders, Architects, and Remodeling Firms

For over 40 years, National Water Service has been a Leader throughout the Mid-Atlantic Region for all things Water Treatment, Water Testing, and Well Pump related.
Contact Us
Contact Information
7 Day a Week Emergency Service

Main Office

7249 Mink Hollow Road
Highland, MD 20777
(301) 854-1333
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Our Store

14111 Seneca Road
Darnestown, MD 20874
(410) 379-1993
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Call Us

Maryland: (301) 854-1333
Washington DC: (301) 854-1333
Baltimore: (410) 379-1993
Virginia: (540) 882-4006
Fax: (301) 854-1538
Email:  info@nationalwaterservice.com 
SOME OF OUR SERVICE AREAS

Featured Counties

- Frederick County, Maryland

- Howard County, Maryland

- Montgomery County, Maryland

- Loudoun County, Virginia

- Anne Arundel County, Maryland

- Baltimore County, Maryland

- Carroll County, Maryland

- Prince George's County, Maryland

- Fairfax County, Virginia

- Prince William County, Virginia

- Washington, D.C.


Featured Cities

- Clarksville, Maryland

- Gaithersburg, Maryland

- Germantown, Maryland

- Rockville, Maryland

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