• Central Brass Manufacturing Company

• Central Sprinkler Company

• Cesco Brass, Ltd.

• Circle Seal Controls, Inc.

• Civacon

• Cla-Val Canada Ltd.

• Cla-Val Co.

• Clark-Reliance Corp.

• Cole-Parmer Instrument Co.

• Colonial Engineering, Inc.

• Conbraco Industries

• Conley Corporation

• Control Power- Reliance

• Cooper-Cameron Corp

• Copper Development Association Inc.

• Crane Co. Valves

• Danfoss Fluid Power, Inc.

• Danze, Inc.

• DeZURIK/Copes-Vulcan

• DeZURIK/Copes-Vulcan - Canada

• Delta Control Products

• Dema Engrg. Co.

• Discount Fence Co. Inc.

• Dixon Valve & Coupling Co.

• Dormont Mfg. Co.

• Dwyer Instruments