Plumbing, heating and electrical supplies generate $200 bln a year

The wholesale distribution of hardware, plumbing, heating, and electrical supplies is a $200 bln industry with about 30,000 outlets. Big distributors have annual sales of several bln, including Graybar, TruServ, and Wesco. But hundreds of midsized firms have sales of $20 to $100 mln, and more than 50% of industry volume passes through firms with annual sales less than $20 mln, Research and Markets found.