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    hudmike1's Avatar
    hudmike1 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 11, 2013, 07:49 PM
    3 inch white pvc cannot connect to black pvc
    I have waste line, black abs under mobile home and needed to replace a section, bought white pvc, I thought the black was 3 inch and I bought 3 inch pvc, but the
    White is larger in diameter by just a little but enough so you cannot cement together, is there a bushing or a transition piece to bring the black abs to the correct diameter of the 3 inch white pvc.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Jan 11, 2013, 10:17 PM
    Plumbing code does not allow cementing different plastics together. Get 2 Fernco fittings and join them that way.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #3

    Jan 12, 2013, 06:55 AM
    Brian nailed it! Code does not permit commingling PVC and ABS. Use metal shielded couplings (see image) to make the connbe3ction. Good luck, Toim
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    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #4

    Jan 12, 2013, 09:58 AM
    Plastic pipes expand and contract at different temps so a cement joint would be a weak spot and likely to fail. Code is frequently there for a good reason.
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