No Service Fee: Trip charge waived if and when a repair is made. Does not apply to Emergency Service.

Air Conditioning, Plumbing & Heating Services in Maryland, Virginia & DC.

Welcome to Thomas E. Clark.

Our promise to the plumbing, heating and air conditioning / ac customer...

We will send only courteous, professional technicians to your home for plumbing, heating and ac / air conditioning repairs. We will give you our professional opinion based on our plumbing, heating and air conditioning knowledge and expertise to provide you with the best possible repair options. We will quote the cost of any repairs for your approval prior to beginning any work. We will work diligently and efficiently with honesty and integrity to provide the most expedient resolution. We will value your time.

Why use Thomas E. Clark for your plumbing, heating and air conditioning needs?

  • Established in 1891. Do you ever wonder when companies present you with a guarantee whether or not they’ll be around to honor it? We’ve been family owned and operated for 122 years and counting.
  • Experience: Our Plumbers average over 20 years plumbing experience.
  • Quality: We use only the finest plumbing, heating and air conditioning parts and equipment. Our philosophy is that using inferior equipment and material cost us and our customer time and money.
  • Customer service and retention is how this business was built and how we have stayed in business for over 120 years.
  • Continuing education programs for all employees, these include weekly plumbing, heating and air conditioning training sessions to keep our staff educated on all the latest technology. (Our apprentices are required to attend school 2 evenings a week for 4 or more years.)
  • Association Membership: Member of the Washington Master Plumbers Association, ABC (Associated Builders and Contractors) , ACCA (Air Conditioning Contractors of America) and NCI (National Comfort Institute).
  • Warranty: 2 years on all new installations and 1 year on all repairs. (Unless otherwise noted in writing.)
  • Up Front Pricing: We present you with your plumbing, heating and/or air conditioning options
Google Map of washington dc

Serving the Maryland cities of

Adelphi, Annapolis, Arnold, Aspen Hill, Beltsville, Berwyn Heights, Bethesda, Bladensburg, Bowie, Brentwood, Cabin John, Calverton, Cheverly, Chevy Chase, Colesville, College Park, Cottage City, Crofton, Davidsonville, Edmonston, Gaithersburg, Garrett Park, Germantown, Glen Echo, Glenarden, Glenmont, Greenbelt, Hillandale, Hollywood, Hyattsville, Kensington, Landover, Lanham, Laurel, Montgomery Village, New Carrolton, Olney, Potomac, Riva, Riverdale, Rockville, Sandy Spring, Severna Park, Silver Spring, Somerset, Spencerville, Takoma Park, University Park, Wheaton, and White Oak

Serving the Washington D.C. cities of

Adams Morgan, Brookland, Cleveland Park, Columbia Heights, Dupont Circle, Foggy Bottom, Friendship Heights, Georgetown, Mt. Pleasant, Palisades, Tenleytown, Van Ness, and Woodley Park

Serving the Virginia cities of

Alexandria, Arlington, Cherrydale, Clarendon, Crystal City, Langley, McLean, Old Town, Pentagon City, Potomac Yard, Rosslyn, and Tysons Corner