2022 NAICS industry in sector 31-33 Manufacturing
33291 Metal Valve Manufacturing
NAICS 33291 is the US industry code for metal valve manufacturing. It covers establishments primarily engaged in manufacturing one or more of the following metal valves: (1) industrial valves; (2) fluid power valves and hose fittings; (3) plumbing fixture fittings and trim; and (4) other metal valves and pipe fittings.
Official definition
This industry comprises establishments primarily engaged in manufacturing one or more of the following metal valves: (1) industrial valves; (2) fluid power valves and hose fittings; (3) plumbing fixture fittings and trim; and (4) other metal valves and pipe fittings.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing fluid power cylinders and pumps are classified in Industry 33399, All Other General Purpose Machinery Manufacturing.
- Manufacturing intake and exhaust valves for internal combustion engines are classified in Industry 33631, Motor Vehicle Gasoline Engine and Engine Parts Manufacturing.
- Manufacturing metal shower rods and metal couplings from purchased metal pipe are classified in Industry 33299, All Other Fabricated Metal Product Manufacturing.
- Manufacturing plastics aerosol spray nozzles are classified in Industry 32619, Other Plastics Product Manufacturing.
- Casting iron pipe fittings and couplings without machining are classified in Industry 33151, Ferrous Metal Foundries.
- Manufacturing plastics pipe fittings and couplings are classified in Industry 32612, Plastics Pipe, Pipe Fitting, and Unlaminated Profile Shape Manufacturing.
Codes in 33291
Data last changed November 14, 2026. How this page is built.