Industry: 1711—Plumbing, Heating and Air-Conditioning
Special trade contractors primarily engaged in plumbing, heating, air-conditioning, and similar work. Sheet metal work performed by plumbing, heating, and air-conditioning contractors in conjunction with the installation of plumbing, heating, and air-conditioning equipment is included here, but roofing and sheet metal work contractors are classified in Industry 1761. Special trade contractors primarily engaged in electrical work are classified in Industry 1731.

Air system balancing and testing—contractorsPlumbing and heating—contractors
Air-conditioning, with or without sheet metal work—contractorsPlumbing repair—contractors
Boiler erection and installation—contractorsPlumbing, with or without sheet metal work—contractors
Drainage system installation, cesspool and septic tank—contractorsRefrigeration and freezer work—contractors
Dry well construction, cesspool—contractorsSewer hookups and connections for buildings—contractors
Fuel oil burner installation and servicing—contractorsSheet metal work combined with heating or air-conditioning—contractors
Furnace repair—contractorsSolar heating apparatus—contractors
Gas line hookup—contractorsSprinkler system installation—contractors
Heating equipment installation—contractorsSteam fitting—contractors
Heating, with or without sheet metal work—contractorsSump pump installation and servicing—contractors
Lawn sprinkler system installation—contractorsVentilating work, with or without sheet metal work—contractors
Mechanical contractorsWater pump installation and servicing—contractors
Piping, plumbing—contractorsWater system balancing and testing—contractors
Codes Titles Number of US Businesses
1711Plumbing, Heating, Air-conditioning167,104
171100Plumbing, heating, air-conditioning23,366
17110000Plumbing, heating, air-conditioning23,366
171101Boiler and furnace contractors3,530
17110100Boiler and furnace contractors313
17110101Boiler maintenance contractor142
17110102Boiler setting contractor33
17110103Heating systems repair and maintenance2,928
17110104Hydronics heating contractor114
171102Plumbing contractors61,189
17110200Plumbing contractors58,978
17110201Septic system construction2,211
171103Sprinkler contractors4,477
17110300Sprinkler contractors1,545
17110301Fire sprinkler system installation1,688
17110302Irrigation sprinkler system installation1,244
171104Heating and air conditioning contractors70,614
17110400Heating and air conditioning contractors28,875
17110401Mechanical contractor12,275
17110402Process piping contractor143
17110403Solar energy contractor2,246
17110404Ventilation and duct work contractor648
17110405Warm air heating and air conditioning contractor26,427
171199Plumbing, heating, air-conditioning, nec3,928
17119901Refrigeration contractor3,928