NAICS 33391 is the North American Industry Classification System code for Pump and Compressor Manufacturing, a NAICS industry in the Other General Purpose Machinery Manufacturing industry group (3339) of the Manufacturing sector (31-33). It divides into 2 more specific codes, including Air and Gas Compressor Manufacturing (333912) and Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914).
NAICS 33391 is the code for Pump and Compressor Manufacturing, a NAICS industry in the North American Industry Classification System (NAICS 2022), under 3339 (Other General Purpose Machinery Manufacturing). It has 2 more specific codes: 333912 and 333914.
The parent of NAICS 33391 is 3339, Other General Purpose Machinery Manufacturing. Every company under 33391 is also counted under 3339.