Local 421 Plumbers & Pipe Fitters

Local 421 Plumbers & Pipe Fitters is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Plumbing Contractors
• Welding Services

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Plumbing Contractors
• Commercial And Industrial Machinery And Equipment (Except Automotive And Electronic) Repair And Maintenance

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Plumbing Contractors
• Welding Repair