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

Thomas E Clark is Your #1 Provider for Plumbing, HVAC Heating & Air Conditioning Repair & Service, Drain Cleaning & Water Heaters in Rockville, MD 20847, 20848, 20849, 20850, 20851, 20852, 20853, 20854, 20855, 20857, 20859.

Welcome to Thomas E. Clark. Established in 1891.
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.

  • Plumbing Repairs and Service
  • Gas Heating Installation, Repairs, Replacements, and Service
  • Cooling/Air Conditioning System Installation, Repairs, Replacements and Service
  • Drain Cleaning and Rooter Services
  • Well Pump and Tank Repairs and Replacements
  • Electric Hot Water Heater Repairs, Replacements & Installations
  • Gas Hot Water Heater Repairs, Replacements & Installations

Call us today at (301) 608-0550 to schedule an appointment.


Thomas E Clark HVAC Cooling System Installation, Air Conditioning Maintenance, and AC Repair for Rockville, MD 20847, 20848, 20849, 20850, 20851, 20852, 20853, 20854, 20855, 20857, 20859.

  • American Standard Heating & AC*
  • Design and install a new air conditioning system
  • Duct Design
  • Ductless Mini-Split
  • Energy Star High Efficiency AC Systems.
  • High Velocity AC Systems, like SpacePak or Unico, are for homes without existing ductwork.
  • Maintenance Plans
  • Manual J Load Calculations
  • Programmable Thermostats
  • AC Service includes all types and brands of AC systems.
  • UV Lights (Ultra-Violet) keep your evaporator coil clean while cleaning the air that passes across it.

Call us today at (301) 608-0550 to schedule an appointment.

* American Standard Air Conditioning is only sold by qualified dealers; if Customer Care dealers get poor reports from the consumers they can no longer sell there products. We require our technicians to complete many hours of continuing education in order to keep up with the industry ac repair standards and changes.

See more information for air conditioning services here.

Thomas E Clark HVAC Heating Repair, Maintenance, Service, and Replacements for Rockville, MD 20847, 20848, 20849, 20850, 20851, 20852, 20853, 20854, 20855, 20857, 20859.

  • Accu-Clean Air
  • American Standard Heating * Customer Care Dealer.
  • Boiler Repair/Replacement
  • Carbon Monoxide
  • Combustion Analysis
  • Design and install a new heatingsystem.
  • Duct Design.
  • Gas Furnaces
  • Heat Pumps
  • High Efficiency Gas Boilers and Furnaces
  • Humidifiers We install all brands of humidifiers though we prefer Aprilaire Humidifiers.
  • Maintenance Plans
  • Oil to Gas Conversion
  • Programmable Thermostats
  • Radiant In floor heating
  • Heating Services include all types and brands of heating systems.
  • Emergency Service 24-7

Call us today at (301) 608-0550 to schedule an appointment.

* American Standard Heating is only sold by qualified dealers; if Customer Care dealers get poor reports from the consumers they can no longer sell there products. We require our technicians to complete many hours of continuing education in order to keep up with the industry standards and changes.

See more information for heating services here.

Thomas E Clark Plumbing Installations, Repairs, and Replacements for Rockville, MD 20847, 20848, 20849, 20850, 20851, 20852, 20853, 20854, 20855, 20857, 20859.

  • Backflow Preventor
  • Gas Grill Hook Ups
  • Drains
  • Garbage disposals & Instant Hot
  • Gas lines repaired and installed
  • Gas Logs
  • Hot Water Instantly
  • Main water service pipe replaced
  • Remodels
  • Repairs
  • Sewer lines repaired and replaced
  • Tankless Water Heaters
  • Water Heaters
  • Emergency Service 24-7

Call us today at (301) 608-0550 to schedule an appointment.

Whole house plumbing inspection by a Master Plumber:
Do things always seem to break at the worst possible time? Why not have your plumbing system checked annually by a master plumber and try to keep these surprises to a minimum. You know that one of our biggest costs is getting the plumber and the truck to your home. It's cheaper for us and for you if we can schedule the time so we don't have to send our plumbers all over town "putting out fires" You receive our special "Add on plumbing rates" for any work that is preformed by a plumber with this plumbing inspection.

See more information for plumbing services here.