- 423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
- 423510 Metal Service Centers and Other Metal Merchant Wholesalers
- 423720 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
- 423850 Service Establishment Equipment and Supplies Merchant Wholesalers
- 424130 Industrial and Personal Service Paper Merchant Wholesalers
- 444190 Other Building Material Dealers-Plumbing Supply Stores
- 424950 Paint, Varnish, and Supplies Merchant Wholesalers
- 423730 Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers