Will I need to break concrete around the toilet drain pipe in the concrete in order to get the flange on or do they go on the inside of drain pipe?

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Originally Posted by mattp

Will I need to break concrete around the toilet drain pipe in the concrete in order to get the flange on or do they go on the inside of drain pipe?

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No, they make a inside flange. When we rough for a toilet in my area we install a styrafome closet wrapper. Sometimes the cement guys overpour this. Tap around the stubup with a hammer to see. If there is a overpour and a closet wrapper you can dig it out with a screwdriver. Regards, Tom