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

    Mar 21, 2012, 05:52 PM
    How can I reduce a 4" cast iron pipe opening to 2" pvc pipe>
    The last owner put a 2' pvc pipe into a 4" cast iron opening -- it looks like they just filled the opening with plumbers putty - i am looking to repair it properly - what can I use to go into the cast iron 4"opening to reduce it to 2" opening which I can then attach 3? Thank you
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #2

    Mar 21, 2012, 09:27 PM
    You purchase Fernco coupling that has 4" opening on one side and 2" opening on the other side. Home Depot carries it. Cost: about $10.00.

    Now, I don't understand the last part of your question: why would you want to go from 4" to 2" to 3" ? Please, elaborate.

    Back to you. Milo
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #3

    Mar 22, 2012, 04:37 AM
    I'm with Milo, It makes no sense to choke down to 2" only to increase to 3". Why not simply caulk in a 4X3 cast iron reducer and be done with it? Please explain? Cheers, Tom
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