S. L. Johnson Plumbing and Heating Inc. serves all of Montgomery County, MD.


We are available if you live in:

Bethesda - Chevy Chase - Damascus - Gaithersburg - Germantown - Kensington - Olney - Potomac - Rockville
Silver Spring - Somerset - Takoma Park - Washington DC Metro area

S.L. Johnson Inc. is committed to providing the highest level of workmanship, dependability and professionalism. We strive to maintain a long lasting happy relationship with all those we serve. Our dedication is to provide exceptional services to all of our customers. We maintain a fleet of fully equipped service vehicles to meet your Plumbing and Heating needs.

S.L. Johnson Plumbing and Heating is available for residential homes, rental properties, mobile homes, manufactured homes and recreational vehicles.
Our Commercial Services are available to small and large businesses, no matter what time of day or night.

We handle a variety of commercial projects in including boiler system installations, commercial HVAC service, handicapped bathroom installations. Our services range from routine drain clearing and snaking of clogged drains to emergency plumbing and maintenance. We also offer mechanical installations in new residential housing and housing rehabilitation projects. We are experts in commercial size well pump installations and fire hydrant installations.

Call us for our 24 Hour Emergency Service for your home and office.

S. L. Johnson Plumbing Service includes:

S. L. Johnson Heating and Air Conditioning Services include Sales, Repairs, Maintenance, and Installation of New Equipment:

  • Garbage disposal repairs & replacements
  • Water filters for faucets or refrigerators
  • Well pump systems repaired or replaced - Damascus
    Montgomery County
  • Gas piping experts - Natural or Liquid Propane
  • Whole house humidifiers installed or repaired
  • Hot water heaters
  • Clogged Pipes and Drains Snaked & Cleared
  • Ice makers repaired or replaced
  • Backflow preventers installed
  • Sump Pump repair & installation
  • Instant hot water systems - Bethesda, Silver Spring
  • Leaking faucets and fixture repairs
  • Leaking water lines repaired or replaced
  • Toilets - All brands serviced
  • Drain cleaning and unclogging
  • Sewer line cleaning or repairs or replaced
  • All plumbing repairs
  • Whole House re-piping
  • Air Conditioning / AC Repair - New Energy Efficient Systems Available
  • Furnaces - Quiet, Energy Efficient Gas or Oil Furnace Installation
  • Heat Pumps - Repaired or Replaced - All Brands Serviced
  • Boilers repaired or replaced for Commercial Businesses Rockville
  • Roof Top Units and Ductless Systems Bethesda
  • Thru The Wall Air Conditioning Units
  • Radiant (in floor) Heat Systems
  • Energy Efficient Programmable Thermostats
  • Ventilation Systems for Residential or Commercial
  • Energy Star Products Available
  • Service Agreements and Extended Warranties Available
  • All HVAC repairs done by qualified professionals
  • We service all manufacturers

Licensed - Bonded - Insured - Plumbers & HVAC Contractors
MD Plumbers License: #66363
Contractor’s License: #WSSC #70980