Analysis
NAICS 33391 is the 2022 NAICS industry for pump and compressor manufacturing, part of 3339 (Other General Purpose Machinery Manufacturing). Census lists 19 example activities under it in the official index.
Between 2018 and 2023 the number of establishments fell 16% and employment fell 5%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
County Business Patterns counts 827 US establishments in this code in 2023, employing 57,688 people at an average annual payroll of $83,579 per employee (72nd percentile of national industries). 23% of the establishments have fewer than five employees, which points to larger operations.
By establishments it ranks 3rd of the 3 codes at this level within Other General Purpose Machinery Manufacturing, with 13.9% of them.
Census lists 5 related activities that belong elsewhere, most often in 33399, 33311, 33911 and 3363. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.
Across its national industries Census lists 19 index entries; typical ones are air compressors (except air-conditioning, refrigeration)… and centrifugal pumps manufacturing.
Official definition
This industry comprises establishments primarily engaged in manufacturing pumps and compressors, such as general purpose air and gas compressors, nonagricultural spraying and dusting equipment, general purpose pumps and pumping equipment (except fluid power pumps and motors), and measuring and dispensing pumps.
Source: US Census Bureau, NAICS 2022 Manual.
Not this code if…
| The business mainly does | Use instead |
|---|---|
| Manufacturing fluid power pumps and motors and handheld pneumatic spray guns | 33399 All Other General Purpose Machinery Manufacturing |
| Manufacturing agricultural spraying and dusting equipment | 33311 Agricultural Implement Manufacturing |
| Manufacturing laboratory vacuum pumps | 33911 Medical Equipment and Supplies Manufacturing |
| Manufacturing pumps and air-conditioning systems and compressors for motor vehicles | 3363 Motor Vehicle Parts Manufacturing |
| Manufacturing air-conditioning systems and compressors (except motor vehicle) | 33341 Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing |
Index entries (19)
- Air compressors (except air-conditioning, refrigeration) manufacturing
- Centrifugal pumps manufacturing