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-conditioning173,713
171100Plumbing, heating, air-conditioning0
17110000Plumbing, heating, air-conditioning19,497
171101Boiler and furnace contractors0
17110100Boiler and furnace contractors245
17110101Boiler maintenance contractor136
17110102Boiler setting contractor32
17110103Heating systems repair and maintenance3,111
17110104Hydronics heating contractor108
171102Plumbing contractors0
17110200Plumbing contractors64,107
17110201Septic system construction2,423
171103Sprinkler contractors0
17110300Sprinkler contractors1,186
17110301Fire sprinkler system installation1,881
17110302Irrigation sprinkler system installation1,486
171104Heating and air conditioning contractors0
17110400Heating and air conditioning contractors24,272
17110401Mechanical contractor13,399
17110402Process piping contractor144
17110403Solar energy contractor2,590
17110404Ventilation and duct work contractor650
17110405Warm air heating and air conditioning contractor34,081
171199Plumbing, heating, air-conditioning, nec0
17119901Refrigeration contractor4,365