| 
                     Delaware 
                   | 
                  
                     1-6770 
                   | 
                  
                     25-0790410 
                   | 
                
| 
                     (State
      or other 
                   | 
                  
                     (Commission
      File 
                   | 
                  
                     (IRS
      Employer 
                   | 
                
| 
                     jurisdiction 
                   | 
                  
                     Number) 
                   | 
                  
                     Identification
      No.) 
                   | 
                
| 
                     of
      incorporation) 
                   | 
                  
| 
                     8285
      Tournament Drive 
                   | 
                  ||
| 
                     Suite
      150 
                   | 
                  ||
| 
                     Memphis, Tennessee 
                   | 
                  
                     38125 
                   | 
                |
| 
                     (Address
      of principal 
                   | 
                  
                     Zip
      Code 
                   | 
                |
| 
                     executive
      offices) 
                   | 
                  
| 
                 | 
              
                 ¨ 
               | 
              
                 Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425) 
               | 
            
| 
                 | 
              
                 ¨ 
               | 
              
                 Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12) 
               | 
            
| 
                 | 
              
                 ¨ 
               | 
              
                 Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b)) 
               | 
            
| 
                 | 
              
                 ¨ 
               | 
              
                 Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c)) 
               | 
            
| 
                   MUELLER
      INDUSTRIES, INC. 
                 | 
              ||
| 
                   By: 
                 | 
                
                   /s/ Kent A. McKee 
                 | 
              |
| 
                   Name: 
                 | 
                
                   Kent
      A. McKee 
                 | 
              |
| 
                   Title: 
                 | 
                
                   Executive
      Vice President 
                 | 
              |
| 
                   and
      Chief Financial Officer 
                 | 
              ||
| 
                                   Exhibit No. 
                                 | 
                                Description | |
| 
                                   99.1 
                                 | 
                                Press release, dated July 21, 2009. |