Description
Equipment and Materials Testing: Plumbing, Heating, and Waste Disposal Equipment

Possible NAICS Codes
238220 – Plumbing, Heating, and Air-Conditioning Contractors
541990 – All Other Professional, Scientific, and Technical Services
541380 – Testing Laboratories and Services
541350 – Building Inspection Services
541330 – Engineering Services
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
562211 – Hazardous Waste Treatment and Disposal
541690 – Other Scientific and Technical Consulting Services
423720 – Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
238990 – All Other Specialty Trade Contractors