Includes
Concrete Pipe and Conduit; Clay Pipe and Conduit for underground use; Drain Tile; Nonmetallic Pipe Fittings for underground use.

Excludes
Nonmetallic Pipe, Conduit, and Fittings for laboratory or electrical use; Hose and Tubing, Flexible Nonmetallic.

Possible NAICS Codes
326122 – Plastics Pipe and Pipe Fitting Manufacturing
332510 – Hardware Manufacturing
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
332996 – Fabricated Pipe and Pipe Fitting Manufacturing
236220 – Commercial and Institutional Building Construction
237110 – Water and Sewer Line and Related Structures Construction
331210 – Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
332919 – Other Metal Valve and Pipe Fitting Manufacturing
444140 – Hardware Retailers
237310 – Highway, Street, and Bridge Construction