MUELLER INDUSTRIES, INC. List of Subsidiaries State or Country Subsidiary* of Incorporation Mueller Brass Co. (Assumed name: Mueller Brass Products) Michigan Mueller Industrial Realty Co. Michigan Itawamba Industrial Gas Company, Inc. Mississippi Streamline Copper & Brass Ltd. Canada Mueller Plastics Holding Company, Inc. Ohio Mueller Plastics Corporation, Inc. Delaware MPC Foundry, Inc. Delaware MPC Machine Shop, Inc. Delaware Mueller Brass Forging Company, Inc. Delaware Mueller Copper Fittings Company, Inc. Delaware Mueller Fittings Company, Inc. Michigan Mueller Copper Tube Company, Inc. Delaware Mueller East, Inc. Delaware Mueller Fittings, L.P. (1) Mueller Formed Tube Company, Inc. Delaware Mueller Impacts Company, Inc. Delaware Mueller Line Set Inc. Delaware Mueller Refrigeration Products Company, Inc. Delaware Mueller Refrigeration Company, Inc. Michigan Mueller Refrigeration Holding Co., Inc. Delaware Mueller Refrigeration Products L.P. (2) Mueller Streamline Co. Delaware Precision Tube Company, Inc. Pennsylvania Mueller Tool and Machine, Inc. Delaware Mueller Casting Company, Inc. Delaware WTC Holding Company, Inc. Michigan Wednesbury Tube & Fittings Company Limited United Kingdom DENO Investment Company, Inc. Michigan DENO Holding Company, Inc. Michigan DENO Acquisition France Desnoyers, S.A. France Toutubes, S.A.R.L. France Mueller Streamline FSC Ltd. Virgin Islands Arava Natural Resources Company, Inc. Delaware United States Fuel Company Nevada King Coal Company Utah Utah Railway Company Utah Canco Oil & Gas Ltd. Canada Aegis Oil & Gas Leasing Ltd. Canada Bayard Mining Corporation Delaware Washington Mining Company Maine -1- List of Subsidiaries (continued) State or Country Subsidiary* of Incorporation Amwest Exploration Company Delaware USSRAM Exploration Company Maine Richmond-Eureka Mining Company (81%) Maine Ruby Hill Mining Company (75%) Maine White Knob Mining Company Idaho Arava Exploration Company Colorado Summit Systems, Inc. Delaware Kennet Company Limited Bermuda Mining Remedial Recovery Company Delaware Carpentertown Coal & Coke Company Pennsylvania USS Lead Refinery, Inc. Maine Leon Water Enterprises, Inc. (50%) Texas Alaska Gold Company Delaware Macomber Construction Company Ohio Macomber Incorporated Ohio Macomber Building and Land Corporation Delaware * All subsidiaries are 100% owned, except as shown. (1) Tennessee Limited Partnership between Mueller East, Inc. and Mueller Fittings Company, Inc. (2) Tennessee Limited Partnership between Mueller Refrigeration Holding Co., Inc. and Mueller Refrigeration Company, Inc. -2-