Trying to track down a leak from our bathroom, I ended up removing the toilet and surrounding floor down to the floor rafters. Discovered a pretty rusted and messed up iron flange apparently screwed on to the 4 inch waste pipe. All replacement pvc flange packages including the "Super Flange" brand said to first remove the old flange. Rigged a device to try to unscrew the rusted flange but couldnt budge it. Right now the old flange is abt 1/2 inch above the floor level.
First, what's the trick to unscrewing the old flange and, second, if I cant get it off, will the addition of a super flange on top create too much height for the toilet? Cant really raise the sub floor either. Appreciate your suggestions.
Most cast iron flanges are held on with lead that has been melted and poured into the space between the flange and the pipe. The Super Flanges I have seen are installed over the existing flange (even broken ones) and screwed to the floor. Only about 1/16 to 1/8" thick.
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