HELP!!! At 57 years old, and disabled, I'm a new do-it yourselfer out of necessity. Long story short, I'm rebuilding a fire damaged, totally gutted 1975 mobile home. After installing the two layers of flooring, I went by the standard of 12 1/2"x15" to install the toilet, drilling a center hole of 1/2", and discovered I was directly over the heat duct line. I have now purchased an offset toilet flange, but am at a loss as to how to install it-i.e., what size hole to cut into the floor, and how close I can get it to the heat duct. It is a 3"/4" toilet flange, and I have 4" schedule 40 PVC. My second pilot hole for the toilet is centered at 12 1/2" from the back wall, and 18" from the side wall, but that clears the heat duct lines by only 1", and the hot water tank is between the toilet and the other wall. At 15", the hot water tank just barely had enough clearance to remove it when necessary, but at 18", it will not be able to be removed for replacement, which is why I purchased the offset flange. Can anyone please help me? You can e-mail me directly at ect1222t@hotmail.com Thanks. -Ed.

This message has been edited. Last edited by: ECT,

Ed
You can use 3 inch closet flange and 3 inch pipe for a water closet. The heat duct does not have a clearance on it so you may be up next to it with your plastic pipe. If you have to use an offset flange just set the flange on the floor the way you want it and mark the floor just enough to allow the lower part of the flange to pass through, remenber you need some flooring around the flange to screw to.