. Then I slid the flange into place and screwed in the Tapcons. Then proceeded with a normal toilet installation. Concrete Flanges If you run into a flange that is going into a concrete floor, make sure you screw the new flange in with Tapcons, not drywall-type blanks and screws. If your flange is loose or deteriorating, it can leak and erode the surrounding flooring, causing significant damage over time. :-( No matter. I have used that too and will agree that it works very well. Replace the toilet and tank and secure the flange … There are no anchors connecting the flange to the concrete slab. if that is concrete under it like mine, after the bolts rusted out ,i just used my rechargeable hammer drill from Home Depot (50 bucks) and concrete bit ,for drilling out the old rusted bolts and on into the concrete ,the further you drill the longer the bolt you need, use two 1/4 inch concrete bolts (Blue) with toilet washers and was done.total of 30 minutes. That will be ugly. How to Cut Cement Board Around a Toilet Flange. . A leaky wax seal or a dripping water supply line can make the area around the toilet wet. I hacksawed the nubs so they were flush with the floor. Will doing the inside install cause my toilet to have more issues with clogging or it doesn't matter at … This made it easy to pull up the toilet, pull up a minimum of floor (about 8 "planks" total), and properly cut the floor so that it fits snugly around the toilet flange. Use Tapcon anchors or a similar type of masonry/concrete screws to fasten the toilet flange to the concrete slab. There is concrete floor . wide by 82 ft. length roll. The mouth of the terra cotta (or clay) drain pipe is about 7" in diameter. If that was mine I'd bust out the concrete, cut the straight pipe, install new hubless PVC to cast coupling, short piece of PVC, elbow and another piece of PVC that comes out above the finished floor. Again, note the grungy towel stuffed into the hole the keep sewer gases from coming into the house. It didn't leak but definitely needed some attention. They make toilet flange repair rings. Then drill a series of holes straight down, about 2"- 3" deep, all the way around the pipe about 1/2" apart from each other and 1/2"- 3/4" away from the pipe. However, installing the flange on a tile floor is different. The base of a toilet is held to the floor with two tee-bolts threaded up from the mounting ring through holes in the base of the toilet. The screws that attach the flange to the floor have rusted out and one is broken to a useless nub (circled in pic). To install a ring, remove the toilet by draining and removing the tank, then loosening the flange nuts on the bowl. Should I try to replace the floor piece or just spray mold spray an Notice that they installed their flange above the finished floor, not at the same level. You can see that I laid ceramic tile in the interim, so I was careful not to chip that. That would be a great tip, esp. Make sure the flange is set up correctly for the toilet t-bolts. http://www.ebay.com/itm/like/260646603526?lpid=82, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. What do you do if you remove an old toilet and discover that the closet bolts are rusted out, there is no closet flange, and the waste line is made of terra cotta? 12 years ago Thanks for your comments. The ceramic of the toilet will expand and contract at a similar rate to the concrete. However, installing the flange on a tile floor is different. With this in mind, the best toilet flange should have a good seal so as to prevent any smell from the sewer lines from entering your house. The toilet flange has two jobs; it is the pipe fitting that connects the drain of the toilet to the floor drain, and it holds the toilet securely to the floor. 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