List of Specific Industries
To the right, click on the [+] or [-] graphics beside an industry category to expand or collapse that list.
North American Industry Classification System (NAICS) codes for this industry
[ 238220 ] = Plumbing, Heating, and Air-Conditioning Contractors – Water system balancing and testing contractors
Potable (drinking) water and DWV (Drain Waste Vent) companies that provide design, specification, and installation services for home construction.