| 
                     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 
             | 
          ||
| 
               Date:
      October 20, 2009 
             | 
            ||
| 
                 Exhibit No. 
               | 
              
                 Description 
               | 
            |
| 
                 99.1  
               | 
              
                 Press
      release, dated October 20,
2009. 
               |