NAIC - SIC Codes Crosswalk » NAICS Code-423720-Plumbing-and-Heating-Equipment-and-Supplies-Hydronics-Merchant-Wholesalers-1207
NAIC 423720 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers = SIC 5074 Plumbing and Hydronic Heating Supplies