| 
                 FOR IMMEDIATE RELEASE 
               | 
              
                 Contact: 
               | 
              
                 Kent A. McKee 
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| 
                 Memphis, TN—April 20, 2010 
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                 (901) 753-3208 
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                   · 
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                   “Net
      sales increased to $485.3 million primarily due to higher selling prices
      that reflect increased raw material costs.  The Comex average
      price of copper was $3.28 per pound in the first quarter of 2010, which
      compares with $1.57 in the first quarter of 2009.  Gross profit
      was $72.2 million in the first quarter which is the best of the last six
      consecutive quarters. 
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                   · 
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                   “Our
      Plumbing & Refrigeration segment posted operating earnings of $40.5
      million that includes a $22.5 million gain on the settlement of an
      insurance claim as discussed above.  Net sales for the first
      quarter of 2010 were $256.7 million.  In the same period a year
      ago, segment earnings were $10.3 million on net sales of $190.4
      million.  Volumes were mixed; tube volumes were lower, while
      fittings volume improved
slightly. 
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| 
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                 · 
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                 “Our
      OEM segment posted operating earnings of $16.1 million during the first
      quarter of 2010 on net sales of $232.2 million, which compares with an
      operating loss of $6.3 million on net sales of $138.4 million for the same
      period in 2009.  The increase in earnings was primarily due to
      higher volume and better spreads as demand
  improved. 
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                 · 
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                 “Stockholders’
      equity was $740.8 million which equates to a book value per share of
      $19.66 of which $10.54 per share was
cash. 
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                 · 
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                 “Our
      current ratio remained solid at 4.0 to 1.  We ended the quarter
      with $397.2 million in cash and $657.3 million in working
      capital. 
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                 · 
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                 “As
      of quarter end, our financial leverage was modest with a debt to total
      capitalization ratio of 19.5
percent.” 
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                           For the Quarter Ended 
                         | 
                        ||||||||
| 
                           March 27, 
                         | 
                        
                           March 28, 
                         | 
                        |||||||
| 
                           2010 
                         | 
                        
                           2009 
                         | 
                        |||||||
| 
                           (Unaudited) 
                         | 
                        ||||||||
| 
                           Net
      sales 
                         | 
                        $ | 485,268 | $ | 326,558 | ||||
| 
                           Cost
      of goods sold 
                         | 
                        413,048 | 287,383 | ||||||
| 
                           Depreciation
      and amortization 
                         | 
                        10,348 | 10,480 | ||||||
| 
                           Selling,
      general, and administrative expense 
                         | 
                        37,323 | 31,158 | ||||||
| 
                           Insurance
      gain 
                         | 
                        (22,506 | ) | - | |||||
| 
                           Operating
      income (loss) 
                         | 
                        47,055 | (2,463 | ) | |||||
| 
                           Interest
      expense 
                         | 
                        (2,532 | ) | (2,636 | ) | ||||
| 
                           Other
      income, net 
                         | 
                        140 | 627 | ||||||
| 
                           Income
      (loss) before income taxes 
                         | 
                        44,663 | (4,472 | ) | |||||
| 
                           Income
      tax (expense) benefit 
                         | 
                        (9,864 | ) | 1,962 | |||||
| 
                           Consolidated
      net income (loss) 
                         | 
                        34,799 | (2,510 | ) | |||||
| 
                           Less
      net (income) loss attributable to noncontrolling interest 
                         | 
                        (841 | ) | 18 | |||||
| 
                           Net
      income (loss) attributable to Mueller Industries, Inc. 
                         | 
                        $ | 33,958 | $ | (2,492 | ) | |||
| 
                           Weighted
      average shares 
                         | 
                        ||||||||
| 
                           for
      basic earnings (loss) per share 
                         | 
                        37,588 | 37,143 | ||||||
| 
                           Effect
      of dilutive stock-based awards 
                         | 
                        94 | - | ||||||
| 
                           Adjusted
      weighted average shares 
                         | 
                        ||||||||
| 
                           for
      diluted earnings (loss) per share 
                         | 
                        37,682 | 37,143 | ||||||
| 
                           Basic
      earnings (loss) per share 
                         | 
                        $ | 0.90 | $ | (0.07 | ) | |||
| 
                           Diluted
      earnings (loss) per share 
                         | 
                        $ | 0.90 | $ | (0.07 | ) | |||
| 
                           Dividends
      per share 
                         | 
                        $ | 0.10 | $ | 0.10 | ||||
| 
                           Summary Segment Data: 
                         | 
                        ||||||||
| 
                           Net
      sales: 
                         | 
                        ||||||||
| 
                           Plumbing
      & Refrigeration Segment 
                         | 
                        $ | 256,662 | $ | 190,393 | ||||
| 
                           OEM
      Segment 
                         | 
                        232,204 | 138,392 | ||||||
| 
                           Elimination
      of intersegment sales 
                         | 
                        (3,598 | ) | (2,227 | ) | ||||
| 
                           Net
      sales 
                         | 
                        $ | 485,268 | $ | 326,558 | ||||
| 
                           Operating
      income (loss): 
                         | 
                        ||||||||
| 
                           Plumbing
      & Refrigeration Segment 
                         | 
                        $ | 40,459 | $ | 10,331 | ||||
| 
                           OEM
      Segment 
                         | 
                        16,131 | (6,266 | ) | |||||
| 
                           Unallocated
      expenses 
                         | 
                        (9,535 | ) | (6,528 | ) | ||||
| 
                           Operating
      income (loss) 
                         | 
                        $ | 47,055 | $ | (2,463 | ) | |||
| 
                   March
      27, 
                 | 
                
                   December
      26, 
                 | 
                |||||||
| 
                   2010 
                 | 
                
                   2009 
                 | 
                |||||||
| 
                   (Unaudited) 
                 | 
                ||||||||
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                   ASSETS 
                 | 
                ||||||||
| 
                   Cash
      and cash equivalents 
                 | 
                $ | 397,180 | $ | 346,001 | ||||
| 
                   Accounts
      receivable, net 
                 | 
                256,950 | 228,739 | ||||||
| 
                   Inventories 
                 | 
                185,828 | 191,262 | ||||||
| 
                   Other
      current assets 
                 | 
                33,478 | 42,841 | ||||||
| 
                   Total
      current assets 
                 | 
                873,436 | 808,843 | ||||||
| 
                   Property,
      plant, and equipment, net 
                 | 
                242,796 | 250,395 | ||||||
| 
                   Other
      assets 
                 | 
                121,902 | 120,903 | ||||||
| $ | 1,238,134 | $ | 1,180,141 | |||||
| 
                   LIABILITIES
      AND EQUITY 
                 | 
                ||||||||
| 
                   Current
      portion of debt 
                 | 
                $ | 27,739 | $ | 24,325 | ||||
| 
                   Accounts
      payable 
                 | 
                89,061 | 73,837 | ||||||
| 
                   Other
      current liabilities 
                 | 
                99,306 | 85,208 | ||||||
| 
                   Total
      current liabilities 
                 | 
                216,106 | 183,370 | ||||||
| 
                   Long-term
      debt, less current portion 
                 | 
                158,226 | 158,226 | ||||||
| 
                   Pension
      and postretirement liabilities 
                 | 
                42,843 | 44,320 | ||||||
| 
                   Environmental
      reserves 
                 | 
                23,862 | 23,268 | ||||||
| 
                   Deferred
      income taxes 
                 | 
                28,675 | 31,128 | ||||||
| 
                   Other
      noncurrent liabilities 
                 | 
                923 | 887 | ||||||
| 
                   Total
      liabilities 
                 | 
                470,635 | 441,199 | ||||||
| 
                   Total
      Mueller Industries, Inc. stockholders' equity 
                 | 
                740,815 | 713,167 | ||||||
| 
                   Noncontrolling
      interest 
                 | 
                26,684 | 25,775 | ||||||
| 
                   Total
      equity 
                 | 
                767,499 | 738,942 | ||||||
| $ | 1,238,134 | $ | 1,180,141 | |||||
| 
                         For the Quarter Ended 
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                      ||||||||
| 
                         March 27, 
                       | 
                      
                         March 28, 
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                      |||||||
| 
                         2010 
                       | 
                      
                         2009 
                       | 
                      |||||||
| 
                         (Unaudited) 
                       | 
                      ||||||||
| 
                         Operating
      activities: 
                       | 
                      ||||||||
| 
                         Net
      income (loss) attributable to Mueller Industries, Inc. 
                       | 
                      $ | 33,958 | $ | (2,492 | ) | |||
| 
                         Reconciliation
      of net income (loss) attributable to Mueller Industries, 
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                      ||||||||
| 
                         Inc.
      to net cash provided by operating activities: 
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                      ||||||||
| 
                         Depreciation
      and amortization 
                       | 
                      10,389 | 10,521 | ||||||
| 
                         Stock-based
      compensation expense 
                       | 
                      704 | 607 | ||||||
| 
                         Gain
      on disposal of properties 
                       | 
                      (6 | ) | (87 | ) | ||||
| 
                         Insurance
      gain 
                       | 
                      (22,506 | ) | - | |||||
| 
                         Insurance
      proceeds - noncapital related 
                       | 
                      5,561 | - | ||||||
| 
                         Deferred
      income taxes 
                       | 
                      (3,623 | ) | (248 | ) | ||||
| 
                         Income
      tax benefit from exercise of stock options 
                       | 
                      (11 | ) | - | |||||
| 
                         Net
      income (loss) attributable to noncontrolling interest 
                       | 
                      841 | (18 | ) | |||||
| 
                         Changes
      in assets and liabilities: 
                       | 
                      ||||||||
| 
                         Receivables 
                       | 
                      (30,689 | ) | 28,010 | |||||
| 
                         Inventories 
                       | 
                      3,748 | 38,657 | ||||||
| 
                         Other
      assets 
                       | 
                      6,938 | 3,070 | ||||||
| 
                         Current
      liabilities 
                       | 
                      30,899 | (42,167 | ) | |||||
| 
                         Other
      liabilities 
                       | 
                      155 | (620 | ) | |||||
| 
                         Other,
      net 
                       | 
                      280 | (261 | ) | |||||
| 
                         Net
      cash provided by operating activities 
                       | 
                      36,638 | 34,972 | ||||||
| 
                         Investing
      activities: 
                       | 
                      ||||||||
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                         Capital
      expenditures 
                       | 
                      (4,479 | ) | (4,842 | ) | ||||
| 
                         Insurance
      proceeds for property and
      equipment 
                       | 
                      17,703 | - | ||||||
| 
                         Proceeds
      from sales of properties 
                       | 
                      8 | 402 | ||||||
| 
                         Net
      withdrawals from restricted cash balances 
                       | 
                      2,524 | 5,852 | ||||||
| 
                         Net
      cash provided by investing activities 
                       | 
                      15,756 | 1,412 | ||||||
| 
                         Financing
      activities: 
                       | 
                      ||||||||
| 
                         Dividends
      paid 
                       | 
                      (3,759 | ) | (3,714 | ) | ||||
| 
                         Issuance
      of shares under incentive stock option plans 
                       | 
                      ||||||||
| 
                         from
      treasury 
                       | 
                      720 | - | ||||||
| 
                         Income
      tax benefit from exercise of stock options 
                       | 
                      11 | - | ||||||
| 
                         Issuance
      (repayment) of debt by joint venture, net 
                       | 
                      3,436 | (10,152 | ) | |||||
| 
                         Net
      cash provided by (used in) financing activities 
                       | 
                      408 | (13,866 | ) | |||||
| 
                         Effect
      of exchange rate changes on cash 
                       | 
                      (1,623 | ) | (1,042 | ) | ||||
| 
                         Increase
      in cash and cash equivalents 
                       | 
                      51,179 | 21,476 | ||||||
| 
                         Cash
      and cash equivalents at the beginning of the period 
                       | 
                      346,001 | 278,860 | ||||||
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                         Cash
      and cash equivalents at the end of the period 
                       | 
                      $ | 397,180 | $ | 300,336 | ||||
| 
                           For the Quarter Ended March 27, 2010 
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                        ||||||||||||
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                           Pro forma 
                         | 
                        ||||||||||||
| 
                           Impact of 
                         | 
                        
                           Without 
                         | 
                        |||||||||||
| 
                           As 
                         | 
                        
                           Insurance 
                         | 
                        
                           Insurance 
                         | 
                        ||||||||||
| 
                           Reported 
                         | 
                        
                           Gain 
                         | 
                        
                           Gain 
                         | 
                        ||||||||||
| 
                           (Unaudited) 
                         | 
                        ||||||||||||
| 
                           Operating
      income 
                         | 
                        $ | 47,055 | $ | (22,506 | ) | $ | 24,549 | |||||
| 
                           Interest
      expense 
                         | 
                        (2,532 | ) | - | (2,532 | ) | |||||||
| 
                           Other
      income, net 
                         | 
                        140 | - | 140 | |||||||||
| 
                           Income
      before income taxes 
                         | 
                        44,663 | (22,506 | ) | 22,157 | ||||||||
| 
                           Income
      tax expense (Note A) 
                         | 
                        (9,864 | ) | (819 | ) | (10,683 | ) | ||||||
| 
                           Consolidated
      net income 
                         | 
                        34,799 | (23,325 | ) | 11,474 | ||||||||
| 
                           Less
      net income attributable to noncontrolling interest 
                         | 
                        (841 | ) | - | (841 | ) | |||||||
| 
                           Net
      income attributable to Mueller Industries, Inc. 
                         | 
                        $ | 33,958 | $ | (23,325 | ) | $ | 10,633 | |||||
| 
                           Diluted
      earnings per share 
                         | 
                        $ | 0.90 | $ | (0.62 | ) | $ | 0.28 | |||||
| 
               (A) 
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               Realization
      of this insurance gain resulted in a tax benefit primarily from the
      utilization of U.K. net operating losses that were previously
      reserved. 
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