| FOR IMMEDIATE RELEASE | Contact: Kent A. McKee | 
| Memphis, TN—July 20, 2010 | (901) 753-3208 | 
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 “Our Plumbing & Refrigeration segment posted operating earnings of $19.7 million on net sales of $285.7 million which compares with prior year earnings of $11.9 million on net sales of $229.8 million.  Improved results were due to better spreads partially offset by lower unit shipments. 
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   “Our OEM segment posted operating earnings of $16.9 million during the second quarter of 2010 on net sales of $257.8 million, which compares with operating earnings of $8.1 million on net sales of $139.9 million for the same period in 2009.  Much of the improvement was due to higher unit shipments. 
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  “Our financial condition remains strong.  We ended the quarter with $397.2 million in cash equal to $10.53 per share. 
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 “Total stockholders’ equity was $755.4 million which equates to a book value of $20.03 per share. 
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 Our current ratio remains solid at 4.0 to 1, and our financial leverage is conservative with a debt to total capitalization ratio of 20.3 percent. 
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  “The Comex average price of copper was $3.19 per pound in the second quarter of 2010, which compares with $2.15 in the second quarter of 2009.  Higher selling prices due to rising material values accounted for approximately $111 million of the increase in net sales primarily in the Plumbing & Refrigeration segment.  Approximately $50 million of the increase in net sales was attributable to increased unit volume primarily in the OEM segment. 
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  “We recognized a charge of $2.5 million for environmental matters related to Eureka Mills, a non-operating site. “ 
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 MUELLER INDUSTRIES, INC. 
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 CONDENSED CONSOLIDATED STATEMENTS OF INCOME 
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 (In thousands, except per share data) 
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 For the Quarter Ended 
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 For the Six Months Ended 
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 June 26, 
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 June 27, 
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 June 26, 
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 June 27, 
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 2010 
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 2009 
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 2010 
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 2009 
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 (Unaudited) 
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 (Unaudited) 
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 Net sales 
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$ | 540,388 | $ | 367,800 | $ | 1,025,656 | $ | 694,358 | ||||||||
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 Cost of goods sold 
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466,645 | 313,353 | 879,693 | 600,736 | ||||||||||||
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 Depreciation and amortization 
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10,090 | 10,355 | 20,438 | 20,835 | ||||||||||||
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 Selling, general, and administrative expense 
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33,468 | 30,316 | 70,791 | 61,474 | ||||||||||||
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 Insurance settlement 
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1,210 | — | (21,296 | ) | — | |||||||||||
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 Operating income 
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28,975 | 13,776 | 76,030 | 11,313 | ||||||||||||
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 Interest expense 
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(2,964 | ) | (2,482 | ) | (5,496 | ) | (5,118 | ) | ||||||||
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 Other (expense) income, net 
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(2,518 | ) | 385 | (2,378 | ) | 1,012 | ||||||||||
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 Income before income taxes 
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23,493 | 11,679 | 68,156 | 7,207 | ||||||||||||
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 Income tax expense 
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(7,456 | ) | (5,512 | ) | (17,320 | ) | (3,550 | ) | ||||||||
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 Consolidated net income 
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16,037 | 6,167 | 50,836 | 3,657 | ||||||||||||
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 Less: net income attributable to noncontrolling interest 
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(479 | ) | (139 | ) | (1,320 | ) | (121 | ) | ||||||||
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 Net income attributable to Mueller Industries, Inc. 
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$ | 15,558 | $ | 6,028 | $ | 49,516 | $ | 3,536 | ||||||||
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 Weighted average shares for basic earnings per share 
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37,674 | 37,143 | 37,631 | 37,143 | ||||||||||||
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 Effect of dilutive stock-based awards 
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43 | 120 | 69 | 97 | ||||||||||||
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 Adjusted weighted average shares for diluted earnings per share   
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37,717 | 37,263 | 37,700 | 37,240 | ||||||||||||
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 Basic earnings per share 
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$ | 0.41 | $ | 0.16 | $ | 1.32 | $ | 0.10 | ||||||||
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 Diluted earnings per share 
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$ | 0.41 | $ | 0.16 | $ | 1.31 | $ | 0.09 | ||||||||
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 Dividends per share 
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$ | 0.10 | $ | 0.10 | $ | 0.20 | $ | 0.20 | ||||||||
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 Summary Segment Data: 
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 Net sales: 
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 Plumbing & Refrigeration Segment 
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$ | 285,717 | $ | 229,763 | $ | 542,379 | $ | 420,156 | ||||||||
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 OEM Segment 
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257,780 | 139,885 | 489,984 | 278,277 | ||||||||||||
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 Elimination of intersegment sales 
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(3,109 | ) | (1,848 | ) | (6,707 | ) | (4,075 | ) | ||||||||
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 Net sales 
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$ | 540,388 | $ | 367,800 | $ | 1,025,656 | $ | 694,358 | ||||||||
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 Operating income: 
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 Plumbing & Refrigeration Segment 
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$ | 19,740 | $ | 11,882 | $ | 60,199 | $ | 22,213 | ||||||||
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 OEM Segment 
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16,932 | 8,052 | 33,063 | 1,786 | ||||||||||||
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 Unallocated expenses 
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(7,697 | ) | (6,158 | ) | (17,232 | ) | (12,686 | ) | ||||||||
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 Operating income 
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$ | 28,975 | $ | 13,776 | $ | 76,030 | $ | 11,313 | ||||||||
| MUELLER INDUSTRIES, INC. | ||||||||
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 CONDENSED CONSOLIDATED BALANCE SHEETS 
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 (In thousands) 
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 June 26, 
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 December 26, 
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 2010 
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 2009 
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 (Unaudited) 
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 ASSETS 
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 Cash and cash equivalents 
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$ | 397,155 | $ | 346,001 | ||||
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 Accounts receivable, net 
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286,578 | 228,739 | ||||||
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 Inventories 
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185,054 | 191,262 | ||||||
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 Other current assets 
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35,181 | 42,841 | ||||||
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 Total current assets 
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903,968 | 808,843 | ||||||
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 Property, plant, and equipment, net 
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237,743 | 250,395 | ||||||
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 Other assets 
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122,491 | 120,903 | ||||||
| $ | 1,264,202 | $ | 1,180,141 | |||||
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 LIABILITIES AND EQUITY 
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 Current portion of debt 
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$ | 40,765 | $ | 24,325 | ||||
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 Accounts payable 
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98,336 | 73,837 | ||||||
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 Other current liabilities 
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86,453 | 85,208 | ||||||
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 Total current liabilities 
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225,554 | 183,370 | ||||||
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 Long-term debt, less current portion 
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158,226 | 158,226 | ||||||
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 Pension and postretirement liabilities 
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43,082 | 44,320 | ||||||
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 Environmental reserves 
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25,630 | 23,268 | ||||||
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 Deferred income taxes 
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28,364 | 31,128 | ||||||
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 Other noncurrent liabilities 
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860 | 887 | ||||||
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 Total liabilities 
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481,716 | 441,199 | ||||||
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 Total Mueller Industries, Inc. stockholders' equity 
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755,436 | 713,167 | ||||||
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 Noncontrolling interest 
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27,050 | 25,775 | ||||||
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 Total equity 
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782,486 | 738,942 | ||||||
| $ | 1,264,202 | $ | 1,180,141 | |||||
| MUELLER INDUSTRIES, INC. | ||||||||
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 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS 
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 (In thousands) 
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 For the Six Months Ended 
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 June 26, 
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 June 27, 
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 2010 
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 2009 
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 (Unaudited) 
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 Operating activities: 
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 Consolidated net income 
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$ | 50,836 | $ | 3,657 | ||||
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 Reconciliation of consolidated net income to net cash provided by operating activities: 
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 Depreciation and amortization 
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20,554 | 20,946 | ||||||
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 Stock-based compensation expense 
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1,435 | 1,220 | ||||||
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 Insurance settlement 
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(21,296 | ) | — | |||||
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 Insurance proceeds - noncapital related 
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5,561 | — | ||||||
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 Loss on disposal of properties 
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164 | 260 | ||||||
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 Deferred income taxes 
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(4,370 | ) | (136 | ) | ||||
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 Income tax benefit from exercise of stock options 
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(88 | ) | — | |||||
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 Gain on early retirement of debt 
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— | (128 | ) | |||||
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 Changes in assets and liabilities: 
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 Receivables 
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(60,819 | ) | 16,831 | |||||
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 Inventories 
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4,796 | 45,209 | ||||||
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 Other assets 
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6,979 | 1,059 | ||||||
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 Current liabilities 
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26,129 | (21,741 | ) | |||||
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 Other liabilities 
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2,870 | (546 | ) | |||||
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 Other, net 
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(363 | ) | (101 | ) | ||||
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 Net cash provided by operating activities 
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32,388 | 66,530 | ||||||
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 Investing activities: 
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 Capital expenditures 
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(9,286 | ) | (8,725 | ) | ||||
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 Insurance proceeds for property and equipment 
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17,703 | — | ||||||
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 Net withdrawals from restricted cash balances 
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11 | 13,039 | ||||||
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 Proceeds from sales of properties 
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23 | 606 | ||||||
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 Net cash provided by investing activities 
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8,451 | 4,920 | ||||||
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 Financing activities: 
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 Dividends paid 
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(7,529 | ) | (7,428 | ) | ||||
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 Issuance (repayment) of debt by joint venture, net 
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16,431 | (14,567 | ) | |||||
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 Repayments of long-term debt 
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— | (370 | ) | |||||
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 Dividends paid to noncontrolling interest 
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— | (1,449 | ) | |||||
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 Acquisition of treasury stock 
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(75 | ) | — | |||||
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 Issuance of shares under incentive stock option plans from treasury 
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2,465 | — | ||||||
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 Income tax benefit from exercise of stock options 
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88 | — | ||||||
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 Net cash provided by (used in) financing activities 
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11,380 | (23,814 | ) | |||||
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 Effect of exchange rate changes on cash 
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(1,065 | ) | 7,463 | |||||
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 Increase in cash and cash equivalents 
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51,154 | 55,099 | ||||||
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 Cash and cash equivalents at the beginning of the period 
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346,001 | 278,860 | ||||||
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 Cash and cash equivalents at the end of the period 
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$ | 397,155 | $ | 333,959 | ||||
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 MUELLER INDUSTRIES, INC. 
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 RECONCILIATION OF NET INCOME AS REPORTED 
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 TO NET INCOME BEFORE INSURANCE SETTLEMENT 
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 (In thousands, except per share data) 
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| For the Six Months Ended June 26, 2010 | ||||||||||||
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 Pro forma 
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 Impact of 
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 Without 
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 As 
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 Insurance 
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 Insurance 
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 Reported 
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 Settlement 
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 Settlement 
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 (Unaudited) 
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 Operating income 
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$ | 76,030 | $ | (21,296 | ) | $ | 54,734 | |||||
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 Interest expense 
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(5,496 | ) | — | (5,496 | ) | |||||||
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 Other income, net 
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(2,378 | ) | — | (2,378 | ) | |||||||
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 Income before income taxes 
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68,156 | (21,296 | ) | 46,860 | ||||||||
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 Income tax expense (Note A) 
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(17,320 | ) | (618 | ) | (17,938 | ) | ||||||
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 Consolidated net income 
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50,836 | (21,914 | ) | 28,922 | ||||||||
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 Less net income attributable to noncontrolling interest 
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(1,320 | ) | — | (1,320 | ) | |||||||
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 Net income attributable to Mueller Industries, Inc. 
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$ | 49,516 | $ | (21,914 | ) | $ | 27,602 | |||||
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 Diluted earnings per share 
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$ | 1.31 | $ | (0.58 | ) | $ | 0.73 | |||||
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 (A)  Realization of this insurance settlement resulted in a tax benefit primarily from the utilization of U.K. net operating 
 
losses that were previously reserved. 
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