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-   -   cast iron flange (http://www.diychatroom.com/f7/cast-iron-flange-26332/)

Jrebhun 09-05-2008 07:38 PM

cast iron flange
 
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.

SD515 09-05-2008 10:45 PM

Good luck unscrewing the old flange. You'd be one of the few I'd ever know to be able to do such.

I've used a 4" angle grinder with a metal cutting wheel before to cut the old flange off. Might consider that. Don't forget safety glasses and a good dust mask.

majakdragon 09-06-2008 01:45 PM

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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